Message/Markup/Atom.dis

Module:
  @QName: Markup|Atom
  @enFN:
    Atom DOM
  @enDesc:
    The <DFN::Atom DOM> is a language and platform independent
    programming language interface to Atom 1.0 documents
    built on the W3C Document Object Model (DOM).  It defines
    a number of interfaces that provide convenience
    methods and attributes to process Atom 1.0 documents.

      {TODO::
        - Move descriptions below to somewhere.

        - Formal definition for <IF::StaticNodeList> (reference
          to Selectors API?) is necessary.
      }

    Some attributes are defined to contain a <IF::StaticNodeList>.
    Multiple invocations for such an attribute don't have
    to return exactly same object, even if no changes are made
    on the underlying DOM structure.

      {NOTE::
        The equality of <IF::StaticNodeList> objects as per
        the <M::Node.isEqualNode> method, however, is
        preserved as long as the underlying DOM structure
        and the configuration parameters are not changed.
      }

    Methods and attributes defined in this module does <EM::not>
    support <IF::tx|EntityReference>s; for example, an element
    node that is a child node of an entity reference node
    that is a child node of another element node is <EM::not> considered
    as a child element node of the other element node.  As a
    result, applications written using this module might ignore
    parts of Atom documents unless they configures their XML
    parser not to expose entity references in the result DOM tree.

  @Namespace:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Markup/Atom/

  @DISCore:author: DISCore|Wakaba
  @License: license|Perl+MPL
  @Date:
    $Date: 2006/05/13 05:40:58 $

  @Require:
    @@Module:
      @@@QName: Markup|common
    @@Module:
      @@@QName: MDOM|TreeCore
      @@@WithFor: ManakaiDOM|ManakaiDOMLatest
    @@Module:
      @@@WithFor: ManakaiDOM|ManakaiDOM
    @@Module:
      @@@WithFor: ManakaiDOM|ManakaiDOMLatest
  @DefaultFor: ManakaiDOM|ManakaiDOMLatest

Namespace:
  @atom:
    http://www.w3.org/2005/Atom
  @c:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/dom-core#
  @cfg:
    http://suika.fam.cx/www/2006/dom-config/
  @dis:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/lang#dis--
  @dlp:
    http://suika.fam.cx/~wakaba/archive/2004/dis/Perl#
  @doc:
    http://suika.fam.cx/~wakaba/archive/2005/7/tutorial#
  @d:
    http://suika.fam.cx/~wakaba/archive/2004/dom/xdt#
  @DOMMain:
    http://suika.fam.cx/~wakaba/archive/2004/dom/main#
  @dx:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/Error/DOMException#
  @ecore:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/Error/Core/
  @f:
    http://suika.fam.cx/~wakaba/archive/2004/dom/feature#
  @fe:
    http://suika.fam.cx/www/2006/feature/
  @html:
    http://www.w3.org/1999/xhtml
  @idl:
    http://suika.fam.cx/~wakaba/archive/2004/dis/IDL#
  @kwd:
    http://suika.fam.cx/~wakaba/archive/2005/rfc2119/
  @lang:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/lang#
  @license:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/license#
  @m12n: 
    http://suika.fam.cx/www/2006/05/m12n/
  @ManakaiDOM:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/manakai-dom#
  @Markup:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Markup#
  @mat:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Markup/Atom/
  @MDOM:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/manakai-dom#ManakaiDOM.
  @MDOMX:
    http://suika.fam.cx/~wakaba/archive/2004/8/4/manakai-dom-exception#
  @mv: 
    http://suika.fam.cx/www/2006/05/mv/
  @rel:
    http://www.iana.org/assignments/relation/
  @s:
    http://suika.fam.cx/~wakaba/archive/2004/dis/Markup#
  @tc:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/DOM/TreeCore/
  @td:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/DOM/Document/
  @te:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/DOM/Element/
  @test:
    http://suika.fam.cx/~wakaba/archive/2004/dis/Test#
  @tx:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/DOM/XML/
  @urigen:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/URI/Generic/
  @xml:
    http://www.w3.org/XML/1998/namespace

ElementTypeBinding:
  @Name: CODE
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: dlp|BlockCode
    @@ForCheck: ManakaiDOM|ForClass

ElementTypeBinding:
  @Name: Method
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: DISLang|Method
    @@ForCheck: !=ManakaiDOM|ManakaiDOM

ElementTypeBinding:
  @Name: Param
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: DISLang|MethodParameter

ElementTypeBinding:
  @Name: Return
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: DISLang|MethodReturn

ElementTypeBinding:
  @Name: Attr
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: DISLang|Attribute
    @@ForCheck: !=ManakaiDOM|ManakaiDOM

ElementTypeBinding:
  @Name: Get
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: DISLang|AttributeGet

ElementTypeBinding:
  @Name: Set
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: DISLang|AttributeSet

ElementTypeBinding:
  @Name: nullCase
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: ManakaiDOM|InCase
    @@Value:
      @@@is-null:1

ElementTypeBinding:
  @Name: PerlDef
  @ElementType:
    dis:Def
  @ShadowContent:
    @@ContentType: lang|Perl
    @@ForCheck: ManakaiDOM|ForClass

ElementTypeBinding:
  @Name: PerlCDef
  @ElementType:
    dis:Def
  @ShadowContent:
    @@ContentType: lang|Perl

ElementTypeBinding:
  @Name: enImplNote
  @ElementType:
    dis:ImplNote
  @ShadowContent:
    @@lang:en

ElementTypeBinding:
  @Name: enFN
  @ElementType:
    dis:FullName
  @ShadowContent:
    @@lang:en

ElementTypeBinding:
  @Name: IFClsETDef
  @ElementType: 
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType:
      @@@@: dis|MultipleResource
      @@@ForCheck: !ManakaiDOM|ForIF !ManakaiDOM|ForClass !s|ForML
    @@resourceFor: ManakaiDOM|ForIF
    @@resourceFor: ManakaiDOM|ForClass
    @@resourceFor: s|ForML
    @@For: ManakaiDOM|ManakaiDOM

    @@DISCore:resourceType:
      @@@@: DISLang|Interface
      @@@ForCheck: ManakaiDOM|ForIF

    @@DISCore:resourceType:
      @@@@: DISLang|Class
      @@@ForCheck: ManakaiDOM|ForClass
    @@Implement:
      @@@@: ||ManakaiDOM|ManakaiDOM||ManakaiDOM|ForIF
      @@@ContentType: DISCore|TFPQNames
      @@@ForCheck: ManakaiDOM|ForClass ManakaiDOM|ManakaiDOM
    @@Implement:
      @@@@: ||ManakaiDOM|ManakaiDOMLatest||ManakaiDOM|ForIF
      @@@ContentType: DISCore|TFPQNames
      @@@ForCheck: ManakaiDOM|ForClass ManakaiDOM|ManakaiDOMLatest

    @@s:elementType:
      @@@@: ||+||s|ForML
      @@@ContentType: DISCore|TFPQNames
      @@@DISCore:stopISARecursive:1

    @@DISCore:resourceType:
      @@@@: s|ElementType
      @@@ForCheck: s|ForML

    @@f:implements: AtomFeature10

ElementTypeBinding:
  @Name: IFClsDef
  @ElementType: 
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType:
      @@@@: dis|MultipleResource
      @@@ForCheck: !ManakaiDOM|ForIF !ManakaiDOM|ForClass !s|ForML
    @@resourceFor: ManakaiDOM|ForIF
    @@resourceFor: ManakaiDOM|ForClass
    @@For: ManakaiDOM|ManakaiDOM

    @@DISCore:resourceType:
      @@@@: DISLang|Interface
      @@@ForCheck: ManakaiDOM|ForIF

    @@DISCore:resourceType:
      @@@@: DISLang|Class
      @@@ForCheck: ManakaiDOM|ForClass
    @@Implement:
      @@@@: ||ManakaiDOM|ManakaiDOM||ManakaiDOM|ForIF
      @@@ContentType: DISCore|TFPQNames
      @@@ForCheck: ManakaiDOM|ForClass ManakaiDOM|ManakaiDOM
    @@Implement:
      @@@@: ||ManakaiDOM|ManakaiDOMLatest||ManakaiDOM|ForIF
      @@@ContentType: DISCore|TFPQNames
      @@@ForCheck: ManakaiDOM|ForClass ManakaiDOM|ManakaiDOMLatest

    @@f:implements: AtomFeature10

ElementTypeBinding:
  @Name: IFQName
  @ElementType:
    dis:QName
  @ShadowContent:
    @@ForCheck: ManakaiDOM|ForIF

ElementTypeBinding:
  @Name: ClsQName
  @ElementType:
    dis:QName
  @ShadowContent:
    @@ForCheck: ManakaiDOM|ForClass

ElementTypeBinding:
  @Name: ETRQName
  @ElementType:
    dis:QName
  @ShadowContent:
    @@ForCheck: s|ForML

ElementTypeBinding:
  @Name: ETQName
  @ElementType:
    dis:AppName
  @ShadowContent:
    @@ForCheck: s|ForML
    @@ContentType: DISCore|QName

ElementTypeBinding:
  @Name: IFISA
  @ElementType:
    dis:ISA
  @ShadowContent:
    @@ForCheck: ManakaiDOM|ForIF

ElementTypeBinding:
  @Name: ClsISA
  @ElementType:
    dis:ISA
  @ShadowContent:
    @@ForCheck: ManakaiDOM|ForClass

ElementTypeBinding:
  @Name: disDef
  @ElementType:
    dis:Def
  @ShadowContent:
    @@ContentType:
      lang:dis
    @@ForCheck: ManakaiDOM|ForClass

ElementTypeBinding:
  @Name: Code
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: dlp|InlineCode
    @@ForCheck: ManakaiDOM|ForClass

ElementTypeBinding:
  @Name: Test
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: test|StandaloneTest
    @@ForCheck: ManakaiDOM|ForClass

ElementTypeBinding:
  @Name: TestC
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: test|StandaloneTest

ResourceDef:
  @QName: Document
  @AliasFor: td|Document
  @For: ManakaiDOM|DOM

ResourceDef:
  @QName: Element
  @AliasFor: te|Element
  @For: ManakaiDOM|DOM

ResourceDef:
  @QName: Attr
  @AliasFor: te|Attr
  @For: ManakaiDOM|DOM

ResourceDef:
  @QName: DOMString
  @AliasFor: DOMMain|DOMString
  @For: ManakaiDOM|DOM

ResourceDef:
  @QName: DOMURI
  @AliasFor: ManakaiDOM|ManakaiDOMURI
  @For: ManakaiDOM|DOM3

ResourceDef:
  @QName: DOMTimeStamp
  @AliasFor: DOMMain|DOMTimeStamp
  @For: ManakaiDOM|DOM2

ResourceDef:
  @QName: boolean
  @AliasFor: idl|boolean||ManakaiDOM|all

ResourceDef:
  @QName: Node
  @AliasFor: tc|Node
  @For: ManakaiDOM|ManakaiDOM

ResourceDef:
  @QName: NodeList
  @AliasFor: tc|NodeList
  @For: ManakaiDOM|ManakaiDOM

ResourceDef:
  @QName: StaticNodeList
  @AliasFor: tc|StaticNodeList
  @For: ManakaiDOM|ManakaiDOM

ElementTypeBinding:
  @Name: enDesc
  @ElementType:
    dis:Description
  @ShadowContent:
    @@lang:en

ElementTypeBinding:
  @Name: enLN
  @ElementType:
    mv:longName
  @ShadowContent:
    @@lang:en

ElementTypeBinding:
  @Name: TrueCase
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType:
      ManakaiDOM:InCase
    @@Value:
      @@@@: 1
      @@@ContentType: DISCore|Boolean
    @@Type: idl|boolean||ManakaiDOM|all

ElementTypeBinding:
  @Name: FalseCase
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType:
      ManakaiDOM:InCase
    @@Value:
      @@@@: 0
      @@@ContentType: DISCore|Boolean
    @@Type: idl|boolean||ManakaiDOM|all

## -- Features

ElementTypeBinding:
  @Name: FeatureDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: f|Feature
    @@For: =ManakaiDOM|all

ElementTypeBinding:
  @Name: FeatureVerDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: f|Feature

ElementTypeBinding:
  @Name: featureQName
  @ElementType:
    f:name
  @ShadowContent:
    @@ContentType: DISCore|QName

FeatureDef:
  @featureQName: fe|Atom
  @QName: AtomFeature
  @FeatureVerDef:
    @@QName: AtomFeature10
    @@Version: 1.0
    @@f:instanceOf: AtomFeature
    @@f:requires: tx|XMLFeature30
    @@enDesc:
      The Atom DOM, version 1.0.

## -- Modules

ModuleSetDef:
  @QName: Atom
  @mv:id: atom
  @enLN: Atom
  @mv:version: 1.0
  @mv:contains: AtomFeed
  @mv:contains: AtomEntry
  @mv:contains: AtomProperty

ModuleDef:
  @QName: AtomFeed
  @mv:id: feed
  @enLN: Feed
  @mv:contains: atom|feed

ModuleDef:
  @QName: AtomEntry
  @mv:id: entry
  @enLN: Entry
  @mv:contains: atom|entry

ModuleDef:
  @QName: AtomProperty
  @mv:id: prop
  @enLN: Property
  @mv:contains: atom|content
  @mv:contains: atom|category
  @mv:contains: atom|generator
  @mv:contains: atom|source
  @mv:contains: atom|link
  @mv:contains: atom|author
  @mv:contains: atom|published
  @mv:contains: atom|updated
  @mv:contains: atom|id
  @mv:contains: atom|title
  @mv:contains: atom|email
  @mv:contains: atom|uri
 
ElementTypeBinding:
  @Name: ModuleSetDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: mv|XMLDTDModuleSet
    @@For: =ManakaiDOM|ManakaiDOMLatest

ElementTypeBinding:
  @Name: ModuleDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType: mv|XMLDTDModule
    @@For: =ManakaiDOM|ManakaiDOMLatest

## -- Implementation

IFClsDef:
  @IFQName: AtomImplementation
  @ClsQName: ManakaiAtomImplementation

  @IFISA: c|DOMImplementation
  @ClsISA: c|ManakaiDOMImplementation

  @enDesc:
    The <IF::AtomImplementation> interface provides convenience
    methods to create Atom documents.

  @f:provides: AtomFeature10

  @Test:
    @@QName: AtomImplementation.interface.test
    @@PerlDef:
      for my $interface (
        <IFName::AtomImplementation>,
        <IFName::AtomImplementation||ManakaiDOM|ManakaiDOM>,
        <IFName::c|DOMImplementation>,
        <IFName::urigen|URIImplementation>,
        <IFName::f|MinimumImplementation>,
        <IFName::f|GetFeature>,
      ) {
        $test->id ($interface);
        $test->assert_true
                 (<Class::ManakaiAtomImplementation>->isa ($interface));
      }
  @Test:
    @@QName: ImplementationRegistry.AtomImplementation.1.test
    @@PerlDef:
      require Message::Markup::Atom;
      my $impl = $Message::DOM::ImplementationRegistry
                   ->get_implementation ({
                       <Q::fe|Atom> => '1.0',
                     });

      $test->assert_isa ($impl, <IFName::AtomImplementation>);
  @Test:
    @@QName: ImplementationRegistry.AtomImplementation.2.test
    @@PerlDef:
      require Message::Markup::Atom;
      my $impl = $Message::DOM::ImplementationRegistry
                   ->get_implementation ({
                       Core => '3.0',
                       <Q::fe|Atom> => '1.0',
                     });

      $test->assert_isa ($impl, <IFName::AtomImplementation>);
  @Test:
    @@QName: ImplementationRegistry.AtomImplementation.3.test
    @@PerlDef:
      require Message::Markup::Atom;
      my $impl = $Message::DOM::ImplementationRegistry
                   ->get_implementation ({
                       XML => '3.0',
                       <Q::fe|Atom> => '1.0',
                     });

      $test->assert_isa ($impl, <IFName::AtomImplementation>);

  @Method:
    @@Name: createAtomFeedDocument
    @@enDesc:
      Creates an Atom Feed Document object.
    @@Param:
      @@@Name: id
      @@@Type: DOMString
      @@@actualType: DOMURI
      @@@enDesc:
        The <XE::atom|id> of the feed.
    @@Param:
      @@@Name: title
      @@@Type: DOMString
      @@@enDesc:
        The <XE::atom|title> of the feed.
      @@@nullCase:
        @@@@enDesc:
          The implementation <kwd:MUST> treate <DOM::null>
          as if an empty string is specified.
    @@Param:
      @@@Name: lang
      @@@Type: DOMString
      @@@enDesc:
        The default natural language of the feed.
      @@@nullCase:
        @@@@enDesc:
          The implementation <kwd:MUST> treate <DOM::null>
          as if an empty string is specified.
    @@Return:
      @@@Type: AtomFeedDocument
      @@@enDesc:
        The newly created Atom Feed Document.

        {P:: The returned object <kwd:MUST> be a <IF::Document> node
             with attributes:

           - <A::Node.childNodes>::: A <IF::NodeList> containing
                                     a new <XE::atom|feed> element node.

           - <A::Document.xmlVersion>::: <XML::1.0>.

        }

        {P:: The newly created <XE::atom|feed> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.attributes>::: A <IF::NamedNodeMap> that contains
                                     at least a new <XA::xml|lang>
                                     attribute node.

           - <A::Node.childNodes>::: A <IF::NodeList> containing
                                     a new <XE::atom|id> element node,
                                     a new <XE::atom|title> element node, and
                                     a new <XE::atom|updated> element node
                                     in any order.

        }

        {P:: The newly created <XA::xml|lang> attribute node <kwd:MUST>
             have attributes set as:

           - <A::Node.nodeValue>::: <P::lang>.

           - <A::Attr.specified>::: <DOM::true>.

        }

        {P:: The newly created <XE::atom|id> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.textContent>::: <P::id>.

        }

        {P:: The newly created <XE::atom|title> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.textContent>::: <P::title>.

        }

        The <XA::type> attribute node <kwd:MUST-NOT> be attached
        to the <XE::atom|title> element node.

        {P:: The newly created <XE::atom|updated> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.textContent>::: A uppercase RFC 3339 <CODE::date-time>
             representation of the time when the method is invoked.
             The implementation <kwd:MAY> align its timezone to
             that of the environment in which the method is invoked.

        }
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::c|DOMImplementation.createDocument>
                        (<Q::atom|>, 'feed');
          $r-><AS::Document.xmlVersion> ('1.0');

          my $feede = $r-><AG::Document.documentElement>;
          $feede-><AS::Node.manakaiLanguage> (defined $lang ? $lang : '');

          $feede-><AS::AtomFeedElement.id> ($id);

          my $titlee = $r-><M::Document.createElementNS> (<Q::atom|>, 'title');
          $titlee-><AS::Node.textContent> (defined $title ? $title : '');
          $feede-><M::Node.appendChild> ($titlee);

          my $updatede = $r-><M::Document.createElementNS>
                               (<Q::atom|>, 'updated');
          $updatede-><AS::AtomDateConstruct.value> (scalar time);
          $feede-><M::Node.appendChild> ($updatede);
        }__;

    @@Test:
      @@@QName: AtomImplementation.createAtomFeedDocument.test
      @@@PerlDef:
        my $impl;
        __CODE{tc|createImplForTest:: $impl => $impl}__;
        $impl = $impl->get_feature (<Q::fe|Atom> => '1.0');

        my $doc = $impl-><M::AtomImplementation.createAtomFeedDocument>
                           ('about:id', 'feed title', 'en');

        $test->id ('document.interface');
        $test->assert_isa ($doc, <IFName::Document>);

        $test->id ('document.xmlVersion');
        $test->assert_equals ($doc-><AG::Document.xmlVersion>, '1.0');

        my $feed = $doc-><AG::Document.documentElement>;

        $test->id ('feed.namespaceURI');
        $test->assert_equals ($feed-><AG::Node.namespaceURI>, <Q::atom|>);

        $test->id ('feed.localName');
        $test->assert_equals ($feed-><AG::Node.localName>, 'feed');

        $test->id ('feed.lang');
        $test->assert_equals ($feed-><M::Element.getAttributeNS>
                                         (<Q::xml|>, 'lang'),
                              'en');

        my $id;
        my $title;
        my $updated;

        for my $cn (@{$feed-><AG::Node.childNodes>}) {
          if ($cn-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
              $cn-><AG::Node.namespaceURI> eq <Q::atom|>) {
            if ($cn-><AG::Node.localName> eq 'id') {
              $id = $cn;
            } elsif ($cn-><AG::Node.localName> eq 'title') {
              $title = $cn;
            } elsif ($cn-><AG::Node.localName> eq 'updated') {
              $updated = $cn;
            }
          }
        }
   
        $test->id ('id');
        $test->assert_not_null ($id);

        $test->id ('id.value');
        $test->assert_equals ($id-><AG::Node.textContent>, 'about:id');
   
        $test->id ('title');
        $test->assert_not_null ($title);

        $test->id ('title.value');
        $test->assert_equals ($title-><AG::Node.textContent>, 'feed title');

        $test->id ('title.type');
        $test->assert_null ($title-><M::Element.getAttributeNS> (null, 'type'));
   
        $test->id ('updated');
        $test->assert_not_null ($updated);

        $test->id ('updated.value');
        $test->assert_num_not_equals
                 (actual_value => $updated-><AG::AtomDateConstruct.value>,
                  expected_value => 0);

  @Method:
    @@Name: createAtomEntryDocument
    @@enDesc:
      Creates an Atom Entry Document object.
    @@Param:
      @@@Name: id
      @@@Type: DOMString
      @@@actualType: DOMURI
      @@@enDesc:
        The <XE::atom|id> of the entry.
    @@Param:
      @@@Name: title
      @@@Type: DOMString
      @@@enDesc:
        The <XE::atom|title> of the entry.
      @@@nullCase:
        @@@@enDesc:
          The implementation <kwd:MUST> treate <DOM::null>
          as if an empty string is specified.
    @@Param:
      @@@Name: lang
      @@@Type: DOMString
      @@@enDesc:
        The natural language of the entry.
      @@@nullCase:
        @@@@enDesc:
          The implementation <kwd:MUST> treate <DOM::null>
          as if an empty string is specified.
    @@Return:
      @@@Type: AtomEntryDocument
      @@@enDesc:
        The newly created Atom Entry Document.

        {P:: The returned object <kwd:MUST> be a <IF::Document> node
             with attributes:

           - <A::Node.childNodes>::: A <IF::NodeList> containing
                                     a new <XE::atom|entry> element node.

           - <A::Document.xmlVersion>::: <XML::1.0>.

        }

        {P:: The newly created <XE::atom|entry> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.attributes>::: A <IF::NamedNodeMap> that contains
                                     at least a new <XA::xml|lang>
                                     attribute node.

           - <A::Node.childNodes>::: A <IF::NodeList> containing
                                     a new <XE::atom|id> element node,
                                     a new <XE::atom|title> element node, and
                                     a new <XE::atom|updated> element node
                                     in any order.

        }

        {P:: The newly created <XA::xml|lang> attribute node <kwd:MUST>
             have attributes set as:

           - <A::Node.nodeValue>::: <P::lang>.

           - <A::Attr.specified>::: <DOM::true>.

        }

        {P:: The newly created <XE::atom|id> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.textContent>::: <P::id>.

        }

        {P:: The newly created <XE::atom|title> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.textContent>::: <P::title>.

        }

        The <XA::type> attribute node <kwd:MUST-NOT> be attached
        to the <XE::atom|title> element node.

        {P:: The newly created <XE::atom|updated> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.textContent>::: A uppercase RFC 3339 <CODE::date-time>
             representation of the time when the method is invoked.
             The implementation <kwd:MAY> align its timezone to
             that of the environment in which the method is invoked.

        }
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::c|DOMImplementation.createDocument>
                        (<Q::atom|>, 'entry');
          $r-><AS::Document.xmlVersion> ('1.0');

          my $feede = $r-><AG::Document.documentElement>;
          $feede-><AS::Node.manakaiLanguage> (defined $lang ? $lang : '');

          $feede-><AS::AtomFeedElement.id> ($id);

          my $titlee = $r-><M::Document.createElementNS> (<Q::atom|>, 'title');
          $titlee-><AS::Node.textContent> (defined $title ? $title : '');
          $feede-><M::Node.appendChild> ($titlee);

          my $updatede = $r-><M::Document.createElementNS>
                               (<Q::atom|>, 'updated');
          $updatede-><AS::AtomDateConstruct.value> (scalar time);
          $feede-><M::Node.appendChild> ($updatede);
        }__;

    @@Test:
      @@@QName: AtomImplementation.createAtomEntryDocument.test
      @@@PerlDef:
        my $impl;
        __CODE{tc|createImplForTest:: $impl => $impl}__;
        $impl = $impl->get_feature (<Q::fe|Atom> => '1.0');

        my $doc = $impl-><M::AtomImplementation.createAtomEntryDocument>
                           ('about:id', 'entry title', 'en');

        $test->id ('document.interface');
        $test->assert_isa ($doc, <IFName::Document>);

        $test->id ('document.xmlVersion');
        $test->assert_equals ($doc-><AG::Document.xmlVersion>, '1.0');

        my $feed = $doc-><AG::Document.documentElement>;

        $test->id ('feed.namespaceURI');
        $test->assert_equals ($feed-><AG::Node.namespaceURI>, <Q::atom|>);

        $test->id ('feed.localName');
        $test->assert_equals ($feed-><AG::Node.localName>, 'entry');

        $test->id ('feed.lang');
        $test->assert_equals ($feed-><M::Element.getAttributeNS>
                                         (<Q::xml|>, 'lang'),
                              'en');

        my $id;
        my $title;
        my $updated;

        for my $cn (@{$feed-><AG::Node.childNodes>}) {
          if ($cn-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
              $cn-><AG::Node.namespaceURI> eq <Q::atom|>) {
            if ($cn-><AG::Node.localName> eq 'id') {
              $id = $cn;
            } elsif ($cn-><AG::Node.localName> eq 'title') {
              $title = $cn;
            } elsif ($cn-><AG::Node.localName> eq 'updated') {
              $updated = $cn;
            }
          }
        }
   
        $test->id ('id');
        $test->assert_not_null ($id);

        $test->id ('id.value');
        $test->assert_equals ($id-><AG::Node.textContent>, 'about:id');
   
        $test->id ('title');
        $test->assert_not_null ($title);

        $test->id ('title.value');
        $test->assert_equals ($title-><AG::Node.textContent>, 'entry title');

        $test->id ('title.type');
        $test->assert_null ($title-><M::Element.getAttributeNS> (null, 'type'));
   
        $test->id ('updated');
        $test->assert_not_null ($updated);

        $test->id ('updated.value');
        $test->assert_num_not_equals
                 (actual_value => $updated-><AG::AtomDateConstruct.value>,
                  expected_value => 0);

  @enImplNote:
    @@ddid: imt
    @@@:
      {ISSUE::
        The <CODE::contentType> attribute of the created document
        should be set to <CODE::application/atom+xml>?
      }

  @CODE:
    @@QName: returnChildElement
    @@enDesc:
      {P:: The algorithm to <DFN::return <VAR::element-type> child
           element> of the element node <VAR::E> is defined as:

        = If <VAR::E> contains one or more child element node
          whose element type is <VAR::element-type>, 
          it <kwd:MUST> return the first such element node
          in document order.

        {OLI:: Otherwise,

          {OLI:: If the <cfg::cfg|create-child-element> configuration
                 parameter is set to <DOM::true>,

             = Create an element node <VAR::N> whose element type 
               is <VAR::element-type>.

             = Append <VAR::N> to <VAR::E> as if the <M::Node.appendChild>
               method were called for <VAR::E> with its parameter
               set to <VAR::N>.  Note that this might throw an exception.

             = Then, <VAR::N> <kwd:MUST> be returned.

          }

          = Otherwise, <DOM::null> <kwd:MUST> be returned.

        }

      }
    @@PerlDef:
      __DEEP{
        E: {
          no warnings 'uninitialized';
          for my $__el (@{$node-><AG::Node.childNodes>}) {
            if ($__el-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                $__el-><AG::Node.localName> eq $localName and
                $__el-><AG::Node.namespaceURI> eq $namespaceURI) {
              $r = $__el;
              last E;
            }
          }
  
          my $od = $node-><AG::Node.ownerDocument>;
          if ($od-><AG::Document.domConfig>
                 -><M::CFG.getParameter> (<Q::cfg|create-child-element>)) {
            $r = $od-><M::Document.createElementNS> ($namespaceURI, $localName);
            $node-><M::Node.appendChild> ($r);
          }
        } # E
      }__;

  @CODE:
    @@QName: returnChildElementList
    @@enDesc:
      {P:: The algorithm to <DFN::return <VAR::element-type> child
           element list> of the element node <VAR::E> is defined as:

         = Creates an empty <IF::StaticNodeList> object <VAR::L>
           that is <EM::not> read-only.

         = For each child element node of <VAR::E>,
           add that element node to <VAR::L> in document order
           if its element type is <VAR::element-type>.

         = Returns <VAR::E>.

      }
    @@PerlDef:
      __DEEP{
        no warnings 'uninitialized';
        __CODE{tc|createStaticNodeList:: $r => $r}__;
        for my $__el (@{$node-><AG::Node.childNodes>}) {
          if ($__el-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
              $__el-><AG::Node.localName> eq $localName and
              $__el-><AG::Node.namespaceURI> eq $namespaceURI) {
            push @{$r}, $__el;
          }
        }
      }__;

  @CODE:
    @@QName: getReflectStringValue
    @@enDesc:
      {P:: If a DOM attribute is defined to <DFN::reflect the string value
           of the <VAR::element-type> child element> of the node <VAR::E>,
           the getter of the attribute <kwd:MUST> return the value
           defined by the algorithm:

        = If the <VAR::E> contains a child element node <VAR::C> whose element
          type is <VAR::element-type>, it <kwd:MUST> return
          the <A::Node.textContent> value of the <VAR::C>.

        = Otherwise, it <kwd:MUST> return <DOM::null>.

      }
    @@PerlDef:
      __DEEP{
        E: {
          no warnings 'uninitialized';
          for my $__cn (@{$node-><AG::Node.childNodes>}) {
            if ($__cn-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                $__cn-><AG::Node.localName> eq $localName and
                $__cn-><AG::Node.namespaceURI> eq $namespaceURI) {
              $r = $__cn-><AG::Node.textContent>;
              last E;
            }
          }
          $r = null;
        } # E
      }__;

  @CODE:
    @@QName: setReflectStringValue
    @@enDesc:
      {P:: If a DOM attribute is defined to <DFN::reflect the string value
           of the <VAR::element-type> child element> of the node <VAR::E>,
           the setter of the attribute <kwd:MUST> modify the node as
           defined by the algorithm:

        = If the given value is <DOM::null>, any child elements
          whose element types are <VAR::element-type> <kwd:MUST>
          be removed from the list of child nodes.

        = Otherwise, if there is no <VAR::element-type> child element
          node in the child node list of the <VAR::E>, it
          <kwd:MUST> create an element node whose element type
          is <VAR::element-type>, append it to the <VAR::E> as
          if the <M::Node.appendChild> method were invoked, and
          set the <A::Node.textContent> of the newly created
          element node to the given value.

        = Otherwise, it <kwd:MUST> set the <A::Node.textContent>
          of the first <VAR::element-type> child element node 
          in the child node list of the <VAR::E> to the given value.

      }

        {NOTE::
          It might throw an exception.
        }
    @@PerlDef:
      __DEEP{
        no warnings 'uninitialized';
        if (defined $given) {
          my $__target;
          E: {
            for my $__cl (@{$node-><AG::Node.childNodes>}) {
              if ($__cl-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                  $__cl-><AG::Node.localName> eq $localName and
                  $__cl-><AG::Node.namespaceURI> eq $namespaceURI) {
                $__target = $__cl;
                last E;
              }
            }

            $__target = $node-><AG::Node.ownerDocument>
                             -><M::Document.createElementNS>
                                 ($namespaceURI, $localName);
            $node-><M::Node.appendChild> ($__target);
          } # E
 
          $__target-><AS::Node.textContent> ($given);
        } else {
          my @__remove;
          for my $__cl (@{$node-><AG::Node.childNodes>}) {
            if ($__cl-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                $__cl-><AG::Node.localName> eq $localName and
                $__cl-><AG::Node.namespaceURI> eq $namespaceURI) {
              push @__remove, $__cl;
            }
          }
          $node-><M::Node.removeChild> ($_) for @__remove;
        }
      }__;

  @CODE:
    @@QName: getReflectAttrStringValue
    @@enDesc:
      {P:: If a DOM attribute is defined to <DFN::reflect the string value
           of the <VAR::attr-name> attribute> of the node <VAR::E>,
           the getter of the attribute <kwd:MUST> return the value
           defined by the algorithm:

        = If the <VAR::E> contains an attribute node <VAR::A> whose name
          is <VAR::attr-name>, it <kwd:MUST> return
          the <A::Node.nodeValue> of the <VAR::A>.

        = If a default value is explicitly defined
          where this algorithm is referenced, it <kwd:MUST>
          return the default value.

        = Otherwise, it <kwd:MUST> return <DOM::null>.

      }
    @@PerlDef:
      __DEEP{
        E: {
          $r = $node-><M::Element.getAttributeNS> ($namespaceURI, $localName);
          last E if defined $r;

          $r = $defaultValue;
        } # E
      }__;

  @CODE:
    @@QName: setReflectAttrStringValue
    @@enDesc:
      {P:: If a DOM attribute is defined to <DFN::reflect the string value
           of the <VAR::attr-name> attribute> of the node <VAR::E>,
           the setter of the attribute <kwd:MUST> modify the node as
           defined by the algorithm:

        = If the given value is <DOM::null>, it <kwd:MUST>
          remove the <VAR::attr-name> attribute node, if any,
          from the list of attribute nodes of <VAR::E>.

        = Otherwise, it <kwd:MUST> set the <VAR::attr-name>
          attribute node value to the given value as if 
          the <M::Element.setAttributeNS> method were invoked.

      }

        {NOTE::
          It might throw an exception.
        }
    @@PerlDef:
      __DEEP{
        if (defined $given) {
          $node-><M::Element.setAttributeNS> ($namespaceURI, $localName, $given);
        } else {
          $node-><M::Element.removeAttributeNS> ($namespaceURI, $localName);
        }
      }__;

  @CODE:
    @@QName: getReflectURIValue
    @@enDesc:
      {P:: If a DOM attribute is defined to <DFN::reflect the URI value
           of the <VAR::element-type> child element> of the node <VAR::E>,
           the getter of the attribute <kwd:MUST> return the value
           defined by the algorithm:

         = Get the string <VAR::S> that would be returned
           if the DOM attribute <I::reflects the string value
           of the <VAR::element-type> child element> of the <VAR::E>.

         = If the <VAR::S> is <DOM::null>, it <kwd:MUST> return
           <DOM::null>.

         = Otherwise, if the <A::Node.baseURI> of the node
           from which the <VAR::S> comes is <DOM::null>,
           it <kwd:MUST> return the <VAR::S>.

         = Otherwise, a string that would be returned by the
           <M::urigen|URIReference.getAbsoluteReference>
           method on a <IF::urigen|URIReference> object whose
           <A::urigen|URIReference.uriReference> value
           equals to <A::Node.textContent> with the <CODE::base> parameter
           set to the <A::Node.baseURI> of the node
           from which the <VAR::S> comes and the <CODE::nonStrict>
           parameter set to <DOM::false>.

      }
    @@PerlDef:
      __DEEP{
        E: {
          no warnings 'uninitialized';
          for my $__cn (@{$node-><AG::Node.childNodes>}) {
            if ($__cn-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                $__cn-><AG::Node.localName> eq $localName and
                $__cn-><AG::Node.namespaceURI> eq $namespaceURI) {
              my $__ref_buri = $__cn-><AG::Node.baseURI>;
              if (defined $__ref_buri) {
                $r = $node-><AG::Node.ownerDocument>
                          -><AG::Document.implementation>
                          -><M::urigen|URIImplementation.createURIReference>
                              ($__cn-><AG::Node.textContent>)
                          -><M::urigen|URIReference.getAbsoluteReference>
                              ($__ref_buri)
                          -><AG::urigen|URIReference.uriReference>;
              } else {
                $r = $__cn-><AG::Node.textContent>;
              }
              last E;
            }
          }
          $r = null;
        } # E
      }__;

  @CODE:
    @@QName: setReflectURIValue
    @@enDesc:
      If a DOM attribute is defined to <DFN::reflect the URI value
      of the <VAR::element-type> child element> of the node <VAR::E>,
      the setter of the attribute <kwd:MUST> modify the node as
      if the DOM attribute <I::reflects the string value of
      the <VAR::element-type> child element> of the <VAR::E>.

        {NOTE::
          It might throw an exception.
        }
    @@PerlDef:
      __CODE{setReflectStringValue}__;

  @CODE:
    @@QName: getReflectAttrURIValue
    @@enDesc:
      {P:: If a DOM attribute is defined to <DFN::reflect the URI value
           of the <VAR::attr-name> attribute> of the node <VAR::E>,
           the getter of the attribute <kwd:MUST> return the value
           defined by the algorithm:

         = Get the string <VAR::S> that would be returned
           if the DOM attribute <I::reflects the string value
           of the <VAR::attr-name> attribute> of the <VAR::E>.

         = If the <VAR::S> is <DOM::null>, it <kwd:MUST> return
           <DOM::null>.

         = Otherwise, if the <A::Node.baseURI> of the node
           from which the <VAR::S> comes is <DOM::null>,
           it <kwd:MUST> return the <VAR::S>.

         = Otherwise, a string that would be returned by the
           <M::urigen|URIReference.getAbsoluteReference>
           method on a <IF::urigen|URIReference> object whose
           <A::urigen|URIReference.uriReference> value
           equals to <A::Node.textContent> with the <CODE::base> parameter
           set to the <A::Node.baseURI> of the node
           from which the <VAR::S> comes and the <CODE::nonStrict>
           parameter set to <DOM::false>.

      }
    @@PerlDef:
      __DEEP{
        my $__attr = $node-><M::Element.getAttributeNodeNS> 
                              ($namespaceURI, $localName);
        if (defined $__attr) {
          my $__attr_base = $__attr-><AG::Node.baseURI>;
          if (defined $__attr_base) {
            $r = $node-><AG::Node.ownerDocument>
                      -><AG::Document.implementation>
                      -><M::urigen|URIImplementation.createURIReference>
                          ($__attr-><AG::Node.nodeValue>)
                      -><M::urigen|URIReference.getAbsoluteReference>
                          ($__attr_base)
                      -><AG::urigen|URIReference.uriReference>;
          } else {
            $r = $__attr-><AG::Node.nodeValue>;
          }
        } else {
          $r = null;
        }
      }__;

  @CODE:
    @@QName: setReflectAttrURIValue
    @@enDesc:
      If a DOM attribute is defined to <DFN::reflect the URI value
      of the <VAR::attr-name> attribute> of the node <VAR::E>,
      the setter of the DOM attribute <kwd:MUST> modify the node as
      if the DOM attribute <I::reflects the string value of
      the <VAR::attr-name> attribute> of the <VAR::E>.

        {NOTE::
          It might throw an exception.
        }
    @@PerlDef:
      __CODE{setReflectAttrStringValue}__;

  @enImplNote:
    @@ddid: datereflect
    @@@:
      {ISSUE::
        <QUOTE::reflecting Date child element> attribute should
        be provided for published and created?
      }
##AtomImplementation

IFClsDef:
  @IFQName: AtomDocument
  @ClsQName: ManakaiAtomDocument

  @IFISA: Document
  @ClsISA: td|ManakaiDOMDocument

  @s:rootElementType: AnyAtomElement||ManakaiDOM|all

  @enDesc:
    If the <Feature::fe|Atom> feature version <FeatureVer::1.0>
    is supported, a <IF::Document> object whose <A::Document.documentElement>'s
    <A::Node.namespaceURI>, if any, is <URI^^DISCore|QName::atom|> at least
    at the time of creation <kwd:MUST> also
    implement the <IF::AtomDocument> interface.  Other
    <IF:Document> objects <kwd:MAY> also implement
    the <IF::AtomDocument> interface.

  @Test:
    @@QName: createDocument.AtomDocument.test
    @@PerlDef:
      my $impl;
      __CODE{tc|createImplForTest:: $impl => $impl}__;
    
      my $doc = $impl-><M::c|DOMImplementation.createDocument>
                         (<Q::atom|>, 'unknown');

      $test->id ('interface');
      $test->assert_isa ($doc, <IFName::AtomDocument>);
##AtomDocument

IFClsDef:
  @IFQName: AtomFeedDocument
  @ClsQName: ManakaiFeedEntryDocument

  @IFISA: AtomDocument
  @ClsISA: ManakaiAtomDocument

  @s:rootElementType:
    @@@: atom|feed
    @@DISCore:stopISARecursive: 1

  @enDesc:
    The <IF::AtomFeedDocument> interface provides convenience
    methods and attributes for an Atom
    Feed Document, i.e. representation of an Atom feed.

    If the <Feature::fe|Atom> feature version <FeatureVer::1.0>
    is supported, a <IF::Document> object whose <A::Document.documentElement>'s
    element type, if any, is <XE::atom|feed> at least at 
    the time of creation <kwd:MUST> also
    implement the <IF::AtomFeedDocument> interface.  Other
    <IF::Document> objects <kwd:MAY> also implement
    the <IF::AtomFeedDocument> interface.

  @Test:
    @@QName: createDocument.AtomFeedDocument.test
    @@PerlDef:
      my $impl;
      __CODE{tc|createImplForTest:: $impl => $impl}__;
    
      my $doc = $impl-><M::c|DOMImplementation.createDocument>
                         (<Q::atom|>, 'feed');

      $test->id ('interface');
      $test->assert_isa ($doc, <IFName::AtomFeedDocument>);
##AtomFeedDocument

IFClsDef:
  @IFQName: AtomEntryDocument
  @ClsQName: ManakaiAtomEntryDocument

  @IFISA: AtomDocument
  @ClsISA: ManakaiAtomDocument

  @s:rootElementType:
    @@@: atom|entry
    @@DISCore:stopISARecursive: 1

  @enDesc:
    The <IF::AtomEntryDocument> interface provides convenience
    methods and attributes for an Atom
    Entry Document, i.e. exactly one Atom entry, outside
    of the context of an Atom feed.

    If the <Feature::fe|Atom> feature version <FeatureVer::1.0>
    is supported, a <IF::Document> object whose <A::Document.documentElement>'s
    element type, if any, is <XE::atom|entry> at least at
    the time of the creation <kwd:MUST> also
    implement the <IF::AtomEntryDocument> interface.  Other
    <IF::Document> objects <kwd:MAY> also implement
    the <IF::AtomEntryDocument> interface.

  @Test:
    @@QName: createDocument.AtomEntryDocument.test
    @@PerlDef:
      my $impl;
      __CODE{tc|createImplForTest:: $impl => $impl}__;
    
      my $doc = $impl-><M::c|DOMImplementation.createDocument>
                         (<Q::atom|>, 'entry');

      $test->id ('interface');
      $test->assert_isa ($doc, <IFName::AtomEntryDocument>);
##AtomEntryDocument

IFClsDef:
  @IFQName: AtomElement
  @ClsQName: ManakaiAtomElement

  @IFISA: Element
  @ClsISA: te|ManakaiDOMElement
   
  @s:elementType: AnyAtomElement||ManakaiDOM|all

  @enDesc:
    The <IF::AtomElement> interface provides convenience
    methods and attributes for Atom elements.
    
    If the <Feature::fe|Atom> feature version <FeatureVer::1.0>
    is supported, an <IF::Element> object whose namespace URI
    is <URI^^DIS|QName::atom|> <kwd:MUST> also implement
    the <IF::AtomElement> interface.  Other <IF::Element> objects
    <kwd:MAY> also implement the <IF::AtomElement> interface.

  @enImplNote:
    @@ddid: todo
    @@@:
      {TODO::
        Need <CODE::xmllang> and <CODE::xmlbase> attributes
        from SVG?
      }

  @Test:
    @@QName: AtomElement.interface.test
    @@PerlDef:
      for my $interface (
        <IFName::AtomElement>,
        <IFName::AtomElement||ManakaiDOM|ManakaiDOM>,
        <IFName::Element>,
        <IFName::Node>,
        <IFName::f|GetFeature>,
      ) {
        $test->id ($interface);
        $test->assert_true (<Class::ManakaiAtomElement>->isa ($interface));
      }
  @Test:
    @@QName: createElementNS.AtomElement.test
    @@PerlDef:
      my $doc;
      __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

      my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'unknown');
      $test->assert_isa ($el, <IFName::AtomElement>);
##AtomElement

ResourceDef:
  @QName: AnyAtomElement
  @DISCore:resourceType: s|AnyElementInNS
  @AppName:
    @@@: atom|*
    @@ContentType: DISCore|QName
  @ForCheck: =ManakaiDOM|all

IFClsDef:
  @IFQName: AtomTextConstruct
  @ClsQName: ManakaiAtomTextConstruct

  @IFISA: AtomElement
  @ClsISA: ManakaiAtomElement

  @enDesc:
    The <IF::AtomTextConstruct> interface provides convenience
    methods and attributes for <IF::Element> nodes
    classfied to the Text constructs.  Other <IF::Element>
    objects <kwd:MAY> also implement the <IF::AtomTextConstruct>
    interface.

    A Text construct contains human-readable text, usually in
    small quantities.  The content of Text constructs is
    Language-Sensitive.

  @Attr:
    @@Name: type
    @@enDesc:
      The <XA::type> attribute of the element.

      It <kwd:MUST> <I::reflect the string value
      of the <XA::type> attribute> of the node.  The
      default value <kwd:MUST> be <CODE::text>.
    @@Type: DOMString
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'type',
          $r => $r,
          $defaultValue => 'text',
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'type',
          $given => $given,
        }__;

  @Attr:
    @@Name: container
    @@enDesc:
      The container element that contains the actual content 
      of the construct.
    @@Type: Element
    @@Get:
      @@@enDesc:
        If the <A::AtomTextConstruct.type> is <CODE::xhtml>, 
        the getter <kwd:MUST> <I::return the <XE::html|div> child element>.
        Otherwise, the object itself <kwd:MUST> be returned.
      @@@nullCase:
        @@@@enDesc:
          If the <A::AtomTextConstruct.type> is <CODE::xhtml>
          and the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __DEEP{
          my $type = $self-><AG::AtomTextConstruct.type>;
          if ($type eq 'xhtml') {
            __CODE{returnChildElement::
              $node => $self,
              $namespaceURI => {<Q::html|>},
              $localName => 'div',
              $r => $r,
            }__;
          } else {
            $r = $self;
          }
        }__;

    @@Test:
      @@@QName: AtomTextConstruct.container.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'title');

        $test->id ('no');
        $test->assert_equals ($el-><AG::AtomTextConstruct.container>, $el);

        $test->id ('text');
        $el-><AS::AtomTextConstruct.type> ('text');
        $test->assert_equals ($el-><AG::AtomTextConstruct.container>, $el);

        $test->id ('html');
        $el-><AS::AtomTextConstruct.type> ('html');
        $test->assert_equals ($el-><AG::AtomTextConstruct.container>, $el);

        $test->id ('xhtml');
        $el-><AS::AtomTextConstruct.type> ('xhtml');
        $test->assert_null ($el-><AG::AtomTextConstruct.container>);

        $doc-><AG::Document.domConfig>
            -><M::CFG.setParameter> (<Q::cfg|create-child-element> => true);
        my $con = $el-><AG::AtomTextConstruct.container>;

        $test->id ('xhtml.create');
        $test->assert_not_equals ($con, $el);

        $test->id ('xhtml.namespaceURI');
        $test->assert_equals ($con-><AG::Node.namespaceURI>, <Q::html|>);

        $test->id ('xhtml.localName');
        $test->assert_equals ($con-><AG::Node.localName>, 'div');

        $test->id ('xhtml.parentNode');
        $test->assert_equals ($con-><AG::Node.parentNode>, $el);

        $test->id ('xhtml.2');
        $test->assert_equals ($el-><AG::AtomTextConstruct.container>, $con);
##AtomTextConstruct

IFClsDef:
  @IFQName: AtomPersonConstruct
  @ClsQName: ManakaiAtomPersonConstruct

  @IFISA: AtomElement
  @ClsISA: ManakaiAtomElement

  @enDesc:
    The <IF::AtomPersonConstruct> interface provides convenience
    methods and attributes for <IF::Element> nodes
    classfied to the Person constructs.  Other <IF::Element>
    objects <kwd:MAY> also implement the <IF::AtomPersonConstruct>
    interface.

    A Person construct is an element that describes a person,
    corporation, or similar entity.

  @Attr:
    @@Name: name
    @@enDesc:
      The <XE::atom|name> value of the feed.

      It <kwd:MUST> <I::reflect the string value
      of the <XE::atom|name> child element> of the node.
    @@Type: DOMString
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{getReflectStringValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'name',
          $r => $r,
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the value.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectStringValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'name',
          $given => $given,
        }__;

  @Attr:
    @@Name: nameElement
    @@enDesc:
      The <XE::atom|name> child element of the node.
    @@Type: AtomElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|name> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{returnChildElement::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'name',
          $r => $r,
        }__;

  @Attr:
    @@Name: uri
    @@enDesc:
      The <XE::atom|uri> value of the feed.

      It <kwd:MUST> <I::reflect the URI value
      of the <XE::atom|uri> child element> of the node.
    @@Type: DOMString
    @@actualType: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{getReflectURIValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'uri',
          $r => $r,
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the value.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectURIValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'uri',
          $given => $given,
        }__;

  @Attr:
    @@Name: email
    @@enDesc:
      The <XE::atom|email> value of the feed.

      It <kwd:MUST> <I::reflect the string value
      of the <XE::atom|email> child element> of the node.
    @@Type: DOMString
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{getReflectStringValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'email',
          $r => $r,
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the value.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectStringValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'email',
          $given => $given,
        }__;
##AtomPersonConstruct

IFClsDef:
  @IFQName: AtomDateConstruct
  @ClsQName: ManakaiAtomDateConstruct

  @IFISA: AtomElement
  @ClsISA: ManakaiAtomElement

  @enDesc:
    The <IF::AtomDateConstruct> interface provides convenience
    methods and attributes for <IF::Element> nodes
    classfied to the Date constructs.  Other <IF::Element>
    objects <kwd:MAY> also implement the <IF::AtomDateConstruct>
    interface.

    A Date construct is an element whose content is a date that
    conforms to the uppercase version of the RFC 3339 format.

  @Attr:
    @@Name: value
    @@enDesc:
      The date value of the node.

      {ISSUE::

        - Out of range of platform DOMTimeStamp type

        - Errorous xsd:dateTime

        - Leap seconds

        - Timezone

        - Precision

      }
    @@Type: DOMTimeStamp
    @@Get:
      @@@enDesc:
        {TODO:: Define
        }
      @@@PerlDef:
        my $value = $self-><AG::Node.textContent>;
        if ($value =~ /\A(\d+)-(\d+)-(\d+)T(\d+):(\d+):(\d+)(\.\d+)?
                         (?:Z|([+-]\d+):(\d+))\z/x) {
          require Time::Local;
          $r = Time::Local::timegm_nocheck
                 ($6, defined $8 ? $8 > 0 ? $5 - $9 : $5 + $9 : $5,
                  defined $8 ? $4 - $8 : $4, $3, $2-1, $1-1900);
          $r += "0$7" if defined $7;
        } else {
          $r = 0;
        }
    @@Set:
      @@@enDesc:
        {TODO:: Define
        }
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __DEEP{
          my @value = gmtime (int ($given / 1));
          my $value = sprintf '%04d-%02d-%02dT%02d:%02d:%02d',
                              $value[5] + 1900, $value[4] + 1,
                              $value[3], $value[2], $value[1], $value[0];
          my $f = $given % 1;
          $value .= substr (''.$f, 1) if $f;
          $value .= 'Z';
          $self-><AS::Node.textContent> ($value);
        }__;

  @enImplNote:
    @@ddid: todo
    @@@:
      {TODO::
         Access to components, especially timezone and -00:00.
      }
##AtomDateConstruct

IFClsETDef:
  @IFQName: AtomFeedElement
  @ETQName: atom|feed
  @ETRQName: atom|feed
  @ClsQName: ManakaiAtomFeedElement

  @IFISA: AtomElement
  @ClsISA: ManakaiAtomElement

  @enDesc:
    The <XE::atom|feed> element is the document element 
    of an Atom Feed Document.

    {ISSUE::
      <XE::atom|entry> children <kwd:MUST> be placed after
      any other elements.  Attributes creating children
      should insert them before any entries?
    }

  @Attr:
    @@Name: authorElements
    @@enDesc:
      A static list of <XE::atom|author> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|author> child element list>
        of the node.
      @@@PerlDef:
        __CODE{returnChildElementList::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'author',
          $r => $r,
        }__;

    @@Test:
      @@@QName: AtomFeedElement.authorElements.empty.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'feed');

        my $list = $el-><AG::AtomFeedElement.authorElements>;

        $test->id ('interface');
        $test->assert_isa ($list, <IFName::StaticNodeList>);

        $test->id ('length');
        $test->assert_num_equals
                 (actual_value => 0+@{$list}, expected_value => 0);

        $test->id ('readOnly');
        $test->assert_false ($list-><AG::NodeList.manakaiReadOnly>);
    @@Test:
      @@@QName: AtomFeedElement.authorElements.two.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $e1 = $doc-><M::Document.createElementNS> (<Q::atom|>, 'feed');
        my $a1 = $doc-><M::Document.createElementNS> (<Q::atom|>, 'author');
        $e1-><M::Node.appendChild> ($a1);
        my $a2 = $doc-><M::Document.createElementNS> (<Q::atom|>, 'author');
        $e1-><M::Node.appendChild> ($a2);

        my $list = $e1-><AG::AtomFeedElement.authorElements>;
        my $a3 = $doc-><M::Document.createElementNS> (<Q::atom|>, 'author');
        $e1-><M::Node.appendChild> ($a3);

        $test->id ('length');
        $test->assert_num_equals
                 (actual_value => 0+@{$list}, expected_value => 2);

        $test->id (0);
        $test->assert_equals ($list->[0], $a1);

        $test->id (1);
        $test->assert_equals ($list->[1], $a2);

  @Attr:
    @@Name: categoryElements
    @@enDesc:
      A static list of <XE::atom|category> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|category> child element list>
        of the node.
      @@@PerlDef:
        __CODE{returnChildElementList::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'category',
          $r => $r,
        }__;

  @Attr:
    @@Name: contributorElements
    @@enDesc:
      A static list of <XE::atom|contributor> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|contributor> child element list>
        of the node.
      @@@PerlDef:
        __CODE{returnChildElementList::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'contributor',
          $r => $r,
        }__;

  @Attr:
    @@Name: generatorElement
    @@enDesc:
      The <XE::atom|generator> child element of the node.
    @@Type: AtomGeneratorElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|generator> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{returnChildElement::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'generator',
          $r => $r,
        }__;

    @@Test:
      @@@QName: AtomFeedElement.generatorElement.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'feed');

        $test->id ('no');
        $test->assert_null ($el-><AG::AtomFeedElement.generatorElement>);

        $doc-><AG::Document.domConfig>
            -><M::CFG.setParameter> (<Q::cfg|create-child-element> => true);
        my $ge = $el-><AG::AtomFeedElement.generatorElement>;

        $test->id ('create.interface');
        $test->assert_isa ($ge, <IFName::Element>);

        $test->id ('create.namespaceURI');
        $test->assert_equals ($ge-><AG::Node.namespaceURI>, <Q::atom|>);

        $test->id ('create.localName');
        $test->assert_equals ($ge-><AG::Node.localName>, 'generator');

        $test->id ('has');
        my $ge2 = $el-><AG::AtomFeedElement.generatorElement>;
        $test->assert_equals ($ge2, $ge);

        $test->id ('multiple');
        $el-><M::Node.appendChild>
               ($doc-><M::Document.createElementNS> (<Q::atom|>, 'generator'));
        my $ge3 = $el-><AG::AtomFeedElement.generatorElement>;
        $test->assert_equals ($ge3, $ge);

  @Attr:
    @@Name: icon
    @@enDesc:
      The <XE::atom|icon> value of the feed.

      It <kwd:MUST> <I::reflect the URI value
      of the <XE::atom|icon> child element> of the node.
    @@Type: DOMString
    @@actualType: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{getReflectURIValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'icon',
          $r => $r,
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the value.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectURIValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'icon',
          $given => $given,
        }__;

    @@Test:
      @@@QName: AtomFeedElement.icon.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'feed');

        $test->id ('default');
        $test->assert_null ($el-><AG::AtomFeedElement.icon>);

        $test->id ('set');
        $el-><AS::AtomFeedElement.icon> ('http://example.com/');
        $test->assert_equals ($el-><AG::AtomFeedElement.icon>,
                              'http://example.com/');

        $test->id ('relative');
        $el-><AS::AtomFeedElement.icon> ('favicon.ico');
        $test->assert_equals ($el-><AG::AtomFeedElement.icon>,
                              'favicon.ico');

        $test->id ('relative.base');
        $el-><M::Element.setAttributeNS> (<Q::xml:>, 'xml:base',
                                          'http://www.example.com/');
        $test->assert_equals ($el-><AG::AtomFeedElement.icon>,
                              'http://www.example.com/favicon.ico');

        $test->id ('multiple');
        $el-><M::Node.appendChild>
               ($doc-><M::Document.createElementNS> (<Q::atom|>, 'icon'))
           -><AS::Node.textContent> ('/default.ico'); # ignored
        $test->assert_equals ($el-><AG::AtomFeedElement.icon>,
                              'http://www.example.com/favicon.ico');

        $test->id ('remove');
        $el-><AS::AtomFeedElement.icon> (null);
        $test->assert_null ($el-><AG::AtomFeedElement.icon>);

  @Attr:
    @@Name: id
    @@enDesc:
      The <XE::atom|id> value of the feed.

      It <kwd:MUST> <I::reflect the string value
      of the <XE::atom|id> child element> of the node.
    @@Type: DOMString
    @@actualType: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{getReflectStringValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'id',
          $r => $r,
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the value.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectStringValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'id',
          $given => $given,
        }__;

    @@Test:
      @@@QName: AtomFeedElement.id.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'feed');

        $test->id ('default');
        $test->assert_null ($el-><AG::AtomFeedElement.id>);

        $test->id ('set');
        $el-><AS::AtomFeedElement.id> ('http://example.com/');
        $test->assert_equals ($el-><AG::AtomFeedElement.id>,
                              'http://example.com/');

        $test->id ('relative');
        $el-><AS::AtomFeedElement.id> ('favicon.ico');
        $test->assert_equals ($el-><AG::AtomFeedElement.id>,
                              'favicon.ico');

        $test->id ('relative.base');
        $el-><M::Element.setAttributeNS> (<Q::xml:>, 'xml:base',
                                          'http://www.example.com/');
        $test->assert_equals ($el-><AG::AtomFeedElement.id>,
                              'favicon.ico');

        $test->id ('multiple');
        $el-><M::Node.appendChild>
               ($doc-><M::Document.createElementNS> (<Q::atom|>, 'id'))
           -><AS::Node.textContent> ('/default.ico'); # ignored
        $test->assert_equals ($el-><AG::AtomFeedElement.id>,
                              'favicon.ico');

        $test->id ('remove');
        $el-><AS::AtomFeedElement.id> (null);
        $test->assert_null ($el-><AG::AtomFeedElement.id>);

  @Attr:
    @@Name: linkElements
    @@enDesc:
      A static list of <XE::atom|link> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|link> child element list>
        of the node.
      @@@PerlDef:
        __CODE{returnChildElementList::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'link',
          $r => $r,
        }__;

  @Attr:
    @@Name: logo
    @@enDesc:
      The <XE::atom|logo> value of the feed.

      It <kwd:MUST> <I::reflect the URI value
      of the <XE::atom|logo> child element> of the node.
    @@Type: DOMString
    @@actualType: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{getReflectURIValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'logo',
          $r => $r,
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the value.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectURIValue::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'logo',
          $given => $given,
        }__;

  @Attr:
    @@Name: rightsElement
    @@enDesc:
      The <XE::atom|rights> child element of the node.
    @@Type: AtomRightsElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|rights> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{returnChildElement::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'rights',
          $r => $r,
        }__;

  @Attr:
    @@Name: subtitleElement
    @@enDesc:
      The <XE::atom|subtitle> child element of the node.
    @@Type: AtomSubtitleElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|subtitle> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{returnChildElement::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'subtitle',
          $r => $r,
        }__;

  @Attr:
    @@Name: titleElement
    @@enDesc:
      The <XE::atom|title> child element of the node.
    @@Type: AtomTitleElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|title> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{returnChildElement::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'title',
          $r => $r,
        }__;

  @Attr:
    @@Name: updatedElement
    @@enDesc:
      The <XE::atom|updated> child element of the node.
    @@Type: AtomUpdatedElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|updated> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{returnChildElement::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'updated',
          $r => $r,
        }__;

  @Attr:
    @@Name: entryElements
    @@enDesc:
      A static list of <XE::atom|entry> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|entry> child element list>
        of the node.
      @@@PerlDef:
        __CODE{returnChildElementList::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'entry',
          $r => $r,
        }__;

  @Method:
    @@Name: getEntryElementById
    @@enDesc:
      Returns an <XE::atom|entry> node selected by its <XE::atom|id>.
    @@Param:
      @@@Name: idArg
      @@@Type: DOMString
      @@@actualType: DOMURI
      @@@enDesc:
        The identifier of the entry.
    @@Return:
      @@@Type: AtomEntryElement
      @@@enDesc:
        The <XE::atom|entry> element whose identifier equals to
        <P::id>.

        It <kwd:MUST> return the first child element node in document
        order whose element type is <XE::atom|entry> and
        whose first child element node in document order
        with element type <XE::atom|id> has <A::Node.textContent>
        equals to <P::id>, if any, or <DOM::null>.
      @@@nullCase:
        @@@@enDesc:
          If no matching element.
      @@@PerlDef:
        E: {
          no warnings 'uninitialized';
          for my $cn (@{$self-><AG::Node.childNodes>}) {
            if ($cn-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                $cn-><AG::Node.localName> eq 'entry' and
                $cn-><AG::Node.namespaceURI> eq <Q::atom|>) {
              if ($cn-><AG::AtomEntryElement.id> eq $idArg) {
                $r = $cn;
                last E;
              }
            }
          }
        } # E

  @Method:
    @@Name: addNewEntry
    @@enDesc:
      Creates an <XA::atom|entry> element node and 
      appends to the node.
    @@Param:
      @@@Name: id
      @@@Type: DOMString
      @@@actualType: DOMURI
      @@@enDesc:
        The <XE::atom|id> of the entry.
    @@Param:
      @@@Name: title
      @@@Type: DOMString
      @@@enDesc:
        The <XE::atom|title> of the entry.
      @@@nullCase:
        @@@@enDesc:
          The implementation <kwd:MUST> treate <DOM::null>
          as if an empty string is specified.
    @@Param:
      @@@Name: lang
      @@@Type: DOMString
      @@@enDesc:
        The natural language of the entry.
      @@@nullCase:
        @@@@enDesc:
          No explicit language specification is added.
    @@Return:
      @@@Type: AtomEntryElement
      @@@enDesc:
        The newly created <XE::atom|entry> element.

        {P:: The newly created <XE::atom|entry> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.attributes>::: A <IF::NamedNodeMap> that contains
                                     at least a new <XA::xml|lang>
                                     attribute node except when
                                     the <P::lang> parameter is set
                                     to <DOM::null>.

           - <A::Node.childNodes>::: A <IF::NodeList> containing
                                     a new <XE::atom|id> element node,
                                     a new <XE::atom|title> element node, and
                                     a new <XE::atom|updated> element node
                                     in any order.

        }

        This element node <kwd:MUST> be appended to the node
        as if the <M::Node.appendChild> method were invoked
        on the node and <kwd:MUST> be returned by the method.
        Note that an exception might be thrown during this course.

        {P:: The <XA::xml|lang> attribute node, if created, <kwd:MUST>
             have attributes set as:

           - <A::Node.nodeValue>::: <P::lang>.

           - <A::Attr.specified>::: <DOM::true>.

        }

        {P:: The newly created <XE::atom|id> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.textContent>::: <P::id>.

        }

        {P:: The newly created <XE::atom|title> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.textContent>::: <P::title>.

        }

        The <XA::type> attribute node <kwd:MUST-NOT> be attached
        to the <XE::atom|title> element node.

        {P:: The newly created <XE::atom|updated> element node <kwd:MUST>
             have attributes set as:

           - <A::Node.textContent>::: A uppercase RFC 3339 <CODE::date-time>
             representation of the time when the method is invoked.
             The implementation <kwd:MAY> align its timezone to
             that of the environment in which the method is invoked.

        }
      @@@PerlDef:
        __DEEP{
          my $od = $self-><AG::Node.ownerDocument>;

          $r = $od-><M::Document.createElementNS> (<Q::atom|>, 'entry');
          $r-><AS::Node.manakaiLanguage> ($lang) if defined $lang;

          $r-><AS::AtomFeedElement.id> ($id);

          my $titlee = $od-><M::Document.createElementNS> (<Q::atom|>, 'title');
          $titlee-><AS::Node.textContent> (defined $title ? $title : '');
          $r-><M::Node.appendChild> ($titlee);

          my $updatede = $od-><M::Document.createElementNS>
                                (<Q::atom|>, 'updated');
          $updatede-><AS::AtomDateConstruct.value> (scalar time);
          $r-><M::Node.appendChild> ($updatede);
        }__;

    @@Test:
      @@@QName: AtomFeedElement.addNewEntry.1.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $feed = $doc-><M::Document.createElementNS> (<Q::atom|>, 'feed');

        my $ent = $feed-><M::AtomFeedElement.addNewEntry>
                           ('about:id', 'entry title', 'en');

        $test->id ('entry.interface');
        $test->assert_isa ($ent, <IFName::AtomEntryElement>);

        $test->id ('entry.namespaceURI');
        $test->assert_equals ($ent-><AG::Node.namespaceURI>, <Q::atom|>);

        $test->id ('entry.localName');
        $test->assert_equals ($ent-><AG::Node.localName>, 'entry');

        $test->id ('entry.lang');
        $test->assert_equals ($ent-><M::Element.getAttributeNS>
                                         (<Q::xml|>, 'lang'),
                              'en');

        my $id;
        my $title;
        my $updated;

        for my $cn (@{$ent-><AG::Node.childNodes>}) {
          if ($cn-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
              $cn-><AG::Node.namespaceURI> eq <Q::atom|>) {
            if ($cn-><AG::Node.localName> eq 'id') {
              $id = $cn;
            } elsif ($cn-><AG::Node.localName> eq 'title') {
              $title = $cn;
            } elsif ($cn-><AG::Node.localName> eq 'updated') {
              $updated = $cn;
            }
          }
        }
   
        $test->id ('id');
        $test->assert_not_null ($id);

        $test->id ('id.value');
        $test->assert_equals ($id-><AG::Node.textContent>, 'about:id');
   
        $test->id ('title');
        $test->assert_not_null ($title);

        $test->id ('title.value');
        $test->assert_equals ($title-><AG::Node.textContent>, 'entry title');

        $test->id ('title.type');
        $test->assert_null ($title-><M::Element.getAttributeNS> (null, 'type'));
   
        $test->id ('updated');
        $test->assert_not_null ($updated);

        $test->id ('updated.value');
        $test->assert_num_not_equals
                 (actual_value => $updated-><AG::AtomDateConstruct.value>,
                  expected_value => 0);
    @@Test:
      @@@QName: AtomFeedElement.addNewEntry.2.test
      @@@enDesc:
        <DOM::null> <CODE::lang>.
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $feed = $doc-><M::Document.createElementNS> (<Q::atom|>, 'feed');

        my $ent = $feed-><M::AtomFeedElement.addNewEntry>
                           ('about:id', 'entry title', null);

        $test->id ('entry.lang');
        $test->assert_null ($ent-><M::Element.getAttributeNS>
                                    (<Q::xml|>, 'lang'));
##AtomFeedElement

IFClsETDef:
  @IFQName: AtomEntryElement
  @ETQName: atom|entry
  @ETRQName: atom|entry
  @ClsQName: ManakaiAtomEntryElement

  @IFISA: AtomElement
  @ClsISA: ManakaiAtomElement

  @enDesc:
    The <XE::atom|entry> element represents an individual
    entry, acting as a container for metadata and data
    associated with the entry.

  @Attr:
    @@Name: authorElements
    @@enDesc:
      A static list of <XE::atom|author> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|author> child element list>
        of the node.
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.authorElements.get

  @Attr:
    @@Name: entryAuthorElements
    @@enDesc:
      A static list of <XE::atom|author> elements for the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        = If the node contains one or more <XE::atom|author>
          element node in its child node list, then it
          <kwd:MUST> return a <IF::StaticNodeList> that
          would be returned by the <A::AtomEntryElement.authorElements>
          attribute of the node.

        = Otherwise, if the node contains a <XE::atom|source>
          element node in its child node list, then it 
          <kwd:MUST> return a <IF::StaticNodeList> that
          would be returned by the <A::AtomSourceElement.authorElements>
          attribute of that node, unless its <A::NodeList.length>
          is zero.

        = Otherwise, if the <A::Node.parentNode> of the
          node is a <XE::atom|feed> element node, then
          it <kwd:MUST> return a <IF::StaticNodeList> that
          would be returned by the <A::AtomFeedElement.authorElements>
          attribute of that node.

        = Otherwise, it <kwd:MUST> return a <IF::StaticNodeList>
          whose <A::NodeList.length> is zero.
      @@@PerlDef:
        __DEEP{
          E: {
            no warnings 'uninitialized';
            __CODE{tc|createStaticNodeList:: $r => $r}__;
  
            my $source;
            for my $cn (@{$self-><AG::Node.childNodes>}) {
              if ($cn-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                  $cn-><AG::Node.namespaceURI> eq <Q::atom|>) {
                if ($cn-><AG::Node.localName> eq 'author') {
                  push @{$r}, $cn;
                } elsif ($cn-><AG::Node.localName> eq 'source') {
                  $source = $cn;
                }
              }
            }
            last E unless @{$r} == 0;
  
            if (defined $source) {
              $r = $source-><AG::AtomSourceElement.authorElements>;
            }
            last E unless @{$r} == 0;

            my $parent = $self-><AG::Node.parentNode>;
            if (defined $parent and
                $parent-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                $parent-><AG::Node.namespaceURI> eq <Q::atom|> and
                $parent-><AG::Node.localName> eq 'feed') {
              $r = $parent-><AG::AtomFeedElement.authorElements>;
            }
          } # E
        }__;

    @@Test:
      @@@QName: AtomEntryElement.entryAuthorElements.1.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'entry');


        $test->id ('empty');
        my $list = $el-><AG::AtomEntryElement.entryAuthorElements>;
        $test->assert_num_equals (actual_value => 0+@$list, expected_value => 0);

        $test->id ('one');
        $el-><M::Node.appendChild>
               ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
        $list = $el-><AG::AtomEntryElement.entryAuthorElements>;
        $test->assert_num_equals (actual_value => 0+@$list, expected_value => 1);

        $test->id ('source');
        for ($el-><M::Node.appendChild>
                    ($doc-><M::Document.createElementNS>
                             (<Q::atom|>, 'source'))) {
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
        }
        $list = $el-><AG::AtomEntryElement.entryAuthorElements>;
        $test->assert_num_equals (actual_value => 0+@$list, expected_value => 1);

        $test->id ('parent');
        for ($doc-><M::Document.createElementNS> (<Q::atom|>, 'feed')) {
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild> ($el);
        }
        $list = $el-><AG::AtomEntryElement.entryAuthorElements>;
        $test->assert_num_equals (actual_value => 0+@$list, expected_value => 1);
    @@Test:
      @@@QName: AtomEntryElement.entryAuthorElements.2.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'entry');

        $test->id ('source');
        for ($el-><M::Node.appendChild>
                    ($doc-><M::Document.createElementNS>
                             (<Q::atom|>, 'source'))) {
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
        }
        my $list = $el-><AG::AtomEntryElement.entryAuthorElements>;
        $test->assert_num_equals (actual_value => 0+@$list, expected_value => 2);

        $test->id ('parent');
        for ($doc-><M::Document.createElementNS> (<Q::atom|>, 'feed')) {
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild> ($el);
        }
        $list = $el-><AG::AtomEntryElement.entryAuthorElements>;
        $test->assert_num_equals (actual_value => 0+@$list, expected_value => 2);
    @@Test:
      @@@QName: AtomEntryElement.entryAuthorElements.3.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'entry');

        $test->id ('source');
        for ($el-><M::Node.appendChild>
                    ($doc-><M::Document.createElementNS>
                             (<Q::atom|>, 'source'))) {
          # empty
        }
        my $list = $el-><AG::AtomEntryElement.entryAuthorElements>;
        $test->assert_num_equals (actual_value => 0+@$list, expected_value => 0);

        $test->id ('parent');
        for ($doc-><M::Document.createElementNS> (<Q::atom|>, 'feed')) {
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild> ($el);
        }
        $list = $el-><AG::AtomEntryElement.entryAuthorElements>;
        $test->assert_num_equals (actual_value => 0+@$list, expected_value => 3);
    @@Test:
      @@@QName: AtomEntryElement.entryAuthorElements.4.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'entry');

        $test->id ('parent');
        for ($doc-><M::Document.createElementNS> (<Q::atom|>, 'feed')) {
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild>
                ($doc-><M::Document.createElementNS> (<Q::atom|>, 'author'));
          $_-><M::Node.appendChild> ($el);
        }
        my $list = $el-><AG::AtomEntryElement.entryAuthorElements>;
        $test->assert_num_equals (actual_value => 0+@$list, expected_value => 3);

  @Attr:
    @@Name: categoryElements
    @@enDesc:
      A static list of <XE::atom|category> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|category> child element list>
        of the node.
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.categoryElements.get

  @Attr:
    @@Name: contentElement
    @@enDesc:
      The <XE::atom|content> child element of the node.
    @@Type: AtomContentElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|content> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{returnChildElement::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'content',
          $r => $r,
        }__;

  @Attr:
    @@Name: contributorElements
    @@enDesc:
      A static list of <XE::atom|contributor> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|contributor> child element list>
        of the node.
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.contributorElements.get

  @Attr:
    @@Name: id
    @@enDesc:
      The <XE::atom|id> value of the feed.

      It <kwd:MUST> <I::reflect the string value
      of the <XE::atom|id> child element> of the node.
    @@Type: DOMString
    @@actualType: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.id.get
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the value.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.id.set

  @Attr:
    @@Name: linkElements
    @@enDesc:
      A static list of <XE::atom|link> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|link> child element list>
        of the node.
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.linkElements.get

  @Attr:
    @@Name: publishedElement
    @@enDesc:
      The <XE::atom|published> child element of the node.
    @@Type: AtomPublishedElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|published> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{returnChildElement::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'published',
          $r => $r,
        }__;

  @Attr:
    @@Name: rightsElement
    @@enDesc:
      The <XE::atom|rights> child element of the node.
    @@Type: AtomRightsElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|rights> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.rightsElement.get

  @Attr:
    @@Name: entryRightsElement
    @@enDesc:
      The <XE::atom|rights> element for the node.
    @@Type: AtomRightsElement
    @@Get:
      @@@enDesc:
        = If the node contains a <XE::atom|rights>
          element node in its child node list, then it
          <kwd:MUST> return the first such a node in document order.

        = Otherwise, if the <A::Node.parentNode> of the
          node is a <XE::atom|feed> element node, then
          it <kwd:MUST> return an <IF::AtomRightsElement>
          that would be returned by the <A::AtomFeedElement.rightsElement>
          attribute of that node, except when it is <DOM::null>.

        {OLI:: Otherwise,

          {OLI:: If the <cfg::cfg|create-child-element> configuration
                 parameter is set to <DOM::true>,

             = Create an element node <VAR::N> whose element type
               is <XE::atom|rights>.

             = Append <VAR::N> to this node as if the <M::Node.appendChild>
               method were called for the node with its parameter
               set to <VAR::N>.  Note that this might throw an exception.

             = Then, <VAR::N> <kwd:MUST> be returned.

          }

          = Otherwise, it <kwd:MUST> return <DOM::null>.
        }
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __DEEP{
          E: {
            no warnings 'uninitialized';
            for my $cn (@{$self-><AG::Node.childNodes>}) {
              if ($cn-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                  $cn-><AG::Node.localName> eq 'rights' and 
                  $cn-><AG::Node.namespaceURI> eq <Q::atom|>) {
                $r = $cn;
                last E;
              }
            }

            my $parent = $self-><AG::Node.parentNode>;
            if (defined $parent and
                $parent-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                $parent-><AG::Node.namespaceURI> eq <Q::atom|> and
                $parent-><AG::Node.localName> eq 'feed') {
              for my $cn (@{$parent-><AG::Node.childNodes>}) {
                if ($cn-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                    $cn-><AG::Node.localName> eq 'rights' and 
                    $cn-><AG::Node.namespaceURI> eq <Q::atom|>) {
                  $r = $cn;
                  last E;
                }
              }
            }

            my $od = $self-><AG::Node.ownerDocument>;
            if ($od-><AG::Document.domConfig>
                   -><M::CFG.getParameter> (<Q::cfg|create-child-element>)) {
              $r = $od-><M::Document.createElementNS> (<Q::atom|>, 'rights');
              $self-><M::Node.appendChild> ($r);
            }
          } # E
        }__;

    @@Test:
      @@@QName: AtomEntryElement.entryRightsElement.1.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'entry');

        $test->id ('no');
        my $rights = $el-><AG::AtomEntryElement.entryRightsElement>;
        $test->assert_null ($rights);

        $doc-><AG::Document.domConfig>
            -><M::CFG.setParameter> (<Q::cfg|create-child-element> => true);

        $rights = $el-><AG::AtomEntryElement.entryRightsElement>;

        $test->id ('created.namespaceURI');
        $test->assert_equals ($rights-><AG::Node.namespaceURI>, <Q::atom|>);

        $test->id ('created.localName');
        $test->assert_equals ($rights-><AG::Node.localName>, 'rights');

        $test->id ('created.parentNode');
        $test->assert_equals ($rights-><AG::Node.parentNode>, $el);

        $test->id ('get');
        my $rights2 = $el-><AG::AtomEntryElement.entryRightsElement>;
        $test->assert_equals ($rights2, $rights);
    @@Test:
      @@@QName: AtomEntryElement.entryRightsElement.2.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'entry');

        my $feed = $doc-><M::Document.createElementNS> (<Q::atom|>, 'feed');
        $feed-><M::Node.appendChild> ($el);
        my $rights = $doc-><M::Document.createElementNS> (<Q::atom|>, 'rights');
        $feed-><M::Node.appendChild> ($rights);

        $test->id ('get');
        my $rights2 = $el-><AG::AtomEntryElement.entryRightsElement>;
        $test->assert_equals ($rights2, $rights);

  @Attr:
    @@Name: sourceElement
    @@enDesc:
      The <XE::atom|source> child element of the node.
    @@Type: AtomSourceElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|source> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{returnChildElement::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'source',
          $r => $r,
        }__;

  @Attr:
    @@Name: summaryElement
    @@enDesc:
      The <XE::atom|summary> child element of the node.
    @@Type: AtomSummaryElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|summary> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{returnChildElement::
          $node => $self,
          $namespaceURI => {<Q::atom|>},
          $localName => 'summary',
          $r => $r,
        }__;

  @Attr:
    @@Name: titleElement
    @@enDesc:
      The <XE::atom|title> child element of the node.
    @@Type: AtomTitleElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|title> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.titleElement.get

  @Attr:
    @@Name: updatedElement
    @@enDesc:
      The <XE::atom|updated> child element of the node.
    @@Type: AtomUpdatedElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|updated> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.updatedElement.get
##AtomEntryElement

IFClsETDef:
  @IFQName: AtomContentElement
  @ETQName: atom|content
  @ClsQName: ManakaiAtomContentElement

  @IFISA: AtomElement
  @ClsISA: ManakaiAtomElement

  @enDesc:
    The <XE::atom|content> element either contains or links to
    the content of the entry.

  @Attr:
    @@Name: type
    @@enDesc:
      The type of the element.

      It <kwd:MUST> <I::reflect the string value
      of the <XA::type> attribute> of the node.  It default
      value <kwd:MUST> be <CODE::text> if and only if
      there is no <XA::src> attribute on the node.
    @@Type: DOMString
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'type',
          $r => $r,
          $defaultValue => {
            $self-><M::Element.hasAttributeNS> (null, 'src') ? null : 'text'
          },
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'type',
          $given => $given,
        }__;

    @@Test:
      @@@QName: AtomContentElement.type.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'content');

        $test->id ('default.no.src');
        $test->assert_equals ($el-><AG::AtomContentElement.type>, 'text');

        $test->id ('default.src');
        $el-><AS::AtomContentElement.src> ('http://atom.example/');
        $test->assert_null ($el-><AG::AtomContentElement.type>);

        $test->id ('set.xhtml');
        $el-><AS::AtomContentElement.type> ('xhtml');
        $test->assert_equals ($el-><AG::AtomContentElement.type>, 'xhtml');

        $test->id ('set.imt');
        $el-><AS::AtomContentElement.type> ('application/xml');
        $test->assert_equals ($el-><AG::AtomContentElement.type>,
                              'application/xml');

        $test->id ('remove');
        $el-><AS::AtomContentElement.type> (null);
        $test->assert_null ($el-><AG::AtomContentElement.type>);

  @Attr:
    @@Name: src
    @@enDesc:
      The source of the remote content of the element.

      It <kwd:MUST> <I::reflect the string value
      of the <XA::src> attribute> of the node.
    @@Type: DOMString
    @@Type: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrURIValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'src',
          $r => $r,
          $defaultValue => {null},
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrURIValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'src',
          $given => $given,
        }__;

    @@Test:
      @@@QName: AtomContentElement.src.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'content');

        $test->id ('default');
        $test->assert_null ($el-><AG::AtomContentElement.src>);

        $test->id ('set');
        $el-><AS::AtomContentElement.src> ('http://atom.example/');
        $test->assert_equals ($el-><AG::AtomContentElement.src>,
                              'http://atom.example/');

        $test->id ('set.relative');
        $el-><AS::AtomContentElement.src> ('atom');
        $test->assert_equals ($el-><AG::AtomContentElement.src>, 'atom');

        $test->id ('set.relative.base');
        $el-><M::Element.setAttributeNS> (<Q::xml|>, 'xml:base',
                                          'http://atom.example/');
        $test->assert_equals ($el-><AG::AtomContentElement.src>,
                              'http://atom.example/atom');

        $test->id ('remove');
        $el-><AS::AtomContentElement.src> (null);
        $test->assert_null ($el-><AG::AtomContentElement.src>);

  @Attr:
    @@Name: container
    @@enDesc:
      The container element that contains the actual content for the node.
    @@Type: Element
    @@Get:
      @@@enDesc:
        - If the <A::AtomContentElement.type> is <CODE::xhtml>, 
          it <kwd:MUST> <I::return the <XE::html|div> child element>.

        - Otherwise, if the <A::AtomContentElement.src> is <DOM::null>, 
          it <kwd:MUST> return <DOM::null>.

        - Otherwise, it <kwd:MUST> return the node itself.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __DEEP{
          my $type = $self-><AG::AtomContentElement.type>;
          if (defined $type and $type eq 'xhtml') {
            __UNDEEP{
              __CODE{returnChildElement::
                $node => $self,
                $namespaceURI => {<Q::html|>},
                $localName => 'div',
                $r => $r,
              }__;
            }__;
          } elsif (not $self-><M::Element.hasAttributeNS> (null, 'src')) {
            $r = $self;
          }
        }__;

    @@Test:
      @@@QName: AtomContentElement.container.1.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'content');

        $test->id ('no');
        $test->assert_equals ($el-><AG::AtomContentElement.container>, $el);

        $test->id ('application/smil');
        $el-><AS::AtomContentElement.type> ('application/smil');
        $test->assert_equals ($el-><AG::AtomContentElement.container>, $el);

        $test->id ('text');
        $el-><AS::AtomContentElement.type> ('text');
        $test->assert_equals ($el-><AG::AtomContentElement.container>, $el);

        $test->id ('html');
        $el-><AS::AtomContentElement.type> ('html');
        $test->assert_equals ($el-><AG::AtomContentElement.container>, $el);

        $test->id ('xhtml');
        $el-><AS::AtomContentElement.type> ('xhtml');
        $test->assert_null ($el-><AG::AtomContentElement.container>);

        $doc-><AG::Document.domConfig>
            -><M::CFG.setParameter> (<Q::cfg|create-child-element> => true);
        my $con = $el-><AG::AtomContentElement.container>;

        $test->id ('xhtml.create');
        $test->assert_not_equals ($con, $el);

        $test->id ('xhtml.namespaceURI');
        $test->assert_equals ($con-><AG::Node.namespaceURI>, <Q::html|>);

        $test->id ('xhtml.localName');
        $test->assert_equals ($con-><AG::Node.localName>, 'div');

        $test->id ('xhtml.parentNode');
        $test->assert_equals ($con-><AG::Node.parentNode>, $el);

        $test->id ('xhtml.2');
        $test->assert_equals ($el-><AG::AtomContentElement.container>, $con);
    @@Test:
      @@@QName: AtomContentElement.container.2.test
      @@@enDesc:
        With <XA::src>.
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'content');

        $el-><AS::AtomContentElement.src> ('http://www.example.com/');

        $test->id ('no');
        $test->assert_null ($el-><AG::AtomContentElement.container>);

        $test->id ('application/smil');
        $el-><AS::AtomContentElement.type> ('application/smil');
        $test->assert_null ($el-><AG::AtomContentElement.container>);

  @enImplNote:
    @@ddid: base64
    @@@:
      {TODO::
        Access to Base64'ed content is necessary.
      }
##AtomContentElement

IFClsETDef:
  @IFQName: AtomAuthorElement
  @ETQName: atom|author
  @ClsQName: ManakaiAtomAuthorElement

  @IFISA: AtomPersonConstruct
  @ClsISA: ManakaiAtomPersonConstruct

  @enDesc:
    The <XE::atom|author> element is a Person construct that
    indicates the author of the entry or feed.
##AtomAuthorElement

IFClsETDef:
  @IFQName: AtomCategoryElement
  @ETQName: atom|category
  @ClsQName: ManakaiAtomCategoryElement

  @IFISA: AtomElement
  @ClsISA: ManakaiAtomElement

  @enDesc:
    The <XE::atom|category> element conveys information abut
    a category associated with an entry or feed.

  @Attr:
    @@Name: term
    @@enDesc:
      The <XA::term> attribute of the element.

      It <kwd:MUST> <I::reflect the string value
      of the <XA::term> attribute> of the node.
    @@Type: DOMString
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'term',
          $r => $r,
          $defaultValue => {null},
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'term',
          $given => $given,
        }__;

  @Attr:
    @@Name: scheme
    @@enDesc:
      The categorization scheme of the element.

      It <kwd:MUST> <I::reflect the URI value
      of the <XA::scheme> attribute> of the node.
    @@Type: DOMString
    @@Type: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrURIValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'scheme',
          $r => $r,
          $defaultValue => {null},
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrURIValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'scheme',
          $given => $given,
        }__;

  @Attr:
    @@Name: label
    @@enDesc:
      The <XA::label> attribute of the element.

      It <kwd:MUST> <I::reflect the string value
      of the <XA::label> attribute> of the node.
    @@Type: DOMString
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'label',
          $r => $r,
          $defaultValue => {null},
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'label',
          $given => $given,
        }__;
##AtomCategoryElement

IFClsETDef:
  @IFQName: AtomContributorElement
  @ETQName: atom|contributor
  @ClsQName: ManakaiAtomContributorElement

  @IFISA: AtomPersonConstruct
  @ClsISA: ManakaiAtomPersonConstruct

  @enDesc:
    The <XE::atom|contributor> element is a Person construct that
    indicates a person or other entity who contributed to the entry
    or feed.
##AtomContributorElement

IFClsETDef:
  @IFQName: AtomGeneratorElement
  @ETQName: atom|generator
  @ClsQName: ManakaiAtomGeneratorElement

  @IFISA: AtomElement
  @ClsISA: ManakaiAtomElement

  @enDesc:
    The <XE::atom|generator> element identifies the agent used
    to generate a feed.

  @Attr:
    @@Name: uri
    @@enDesc:
      The URI attribute of the element.

      It <kwd:MUST> <I::reflect the URI value
      of the <XA::uri> attribute> of the node.
    @@Type: DOMString
    @@Type: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrURIValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'uri',
          $r => $r,
          $defaultValue => {null},
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrURIValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'uri',
          $given => $given,
        }__;

  @Attr:
    @@Name: version
    @@enDesc:
      The <XA::version> attribute of the element.

      It <kwd:MUST> <I::reflect the string value
      of the <XA::version> attribute> of the node.
    @@Type: DOMString
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'version',
          $r => $r,
          $defaultValue => {null},
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'version',
          $given => $given,
        }__;
##AtomGeneratorElement

IFClsETDef:
  @IFQName: AtomLinkElement
  @ETQName: atom|link
  @ClsQName: ManakaiAtomLinkElement

  @IFISA: AtomElement
  @ClsISA: ManakaiAtomElement

  @enDesc:
    The <XE::atom|link> element defines a reference from an entry
    or feed to a Web resource.

  @Attr:
    @@Name: href
    @@enDesc:
      The <XA::href> attribute of the element.

      It <kwd:MUST> <I::reflect the URI value
      of the <XA::href> attribute> of the node.
    @@Type: DOMString
    @@Type: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrURIValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'href',
          $r => $r,
          $defaultValue => {null},
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrURIValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'href',
          $given => $given,
        }__;

  @Attr:
    @@Name: rel
    @@enDesc:
      The <XA::rel> attribute of the element.

      It <kwd:MUST> <I::reflect the string value
      of the <XA::rel> attribute> of the node, with
      a few exceptions.  The default value <kwd:MUST> 
      be <URI^DISCore|QName::rel|alternate>.
    @@Type: DOMString
    @@Get:
      @@@enDesc:
        If the algorithm returns a string that does not contain
        any <CHAR::COLON> character, the string
        <URI^DISCore|QName::rel|> <kwd:MUST> be prepended
        for the return value of the getter.
      @@@PerlDef:
        __CODE{getReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'rel',
          $r => $r,
          $defaultValue => {<Q::rel|alternate>},
        }__;
        if (defined $r and index ($r, ':') == -1) {
          $r = <Q::rel|> . $r;
        }
    @@Set:
      @@@enDesc:
        If the given value starts with <URI^DISCore|QName::rel|> (by
        simple character-by-character comparison), such substring
        <kwd:MUST> be removed for the purpose of the setter algorithm, 
        if and only if the result string is not empty and does contain
        none of <CHAR::COLON>, <CHAR::SOLIDUS>, <CHAR::QUESTION MARK>,
        and <CHAR::NUMBER SIGN>.
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        if (defined $given) {
          $given =~ s[\Ahttp://www.iana.org/assignments/relation/([^:/?#]+)\z]
                     [$1];
        }
        __CODE{setReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'rel',
          $given => $given,
        }__;

    @@Test:
      @@@QName: AtomLinkElement.rel.test
      @@@PerlDef:
        my $doc;
        __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

        my $el = $doc-><M::Document.createElementNS> (<Q::atom|>, 'link');

        $test->id ('default');
        $test->assert_equals ($el-><AG::AtomLinkElement.rel>,
                              <Q::rel|alternate>);

        $test->id ('set');
        $el-><AS::AtomLinkElement.rel> ('http://www.example.com/');
        $test->assert_equals ($el-><AG::AtomLinkElement.rel>,
                              'http://www.example.com/');

        $test->id ('set.self');
        $el-><AS::AtomLinkElement.rel> ('self');
        $test->assert_equals ($el-><AG::AtomLinkElement.rel>,
                              <Q::rel|self>);

        $test->id ('set.qrelated');
        $el-><AS::AtomLinkElement.rel> (<Q::rel|related>);
        $test->assert_equals ($el-><AG::AtomLinkElement.rel>,
                              <Q::rel|related>);

        $test->id ('remove');
        $el-><AS::AtomLinkElement.rel> (null);
        $test->assert_equals ($el-><AG::AtomLinkElement.rel>,
                              <Q::rel|alternate>);

  @Attr:
    @@Name: type
    @@enDesc:
      The <XA::type> attribute of the element.

      It <kwd:MUST> <I::reflect the string value
      of the <XA::type> attribute> of the node.
    @@Type: DOMString
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'type',
          $r => $r,
          $defaultValue => {null},
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'type',
          $given => $given,
        }__;

  @Attr:
    @@Name: hreflang
    @@enDesc:
      The <XA::hreflang> attribute of the element.

      It <kwd:MUST> <I::reflect the string value
      of the <XA::hreflang> attribute> of the node.
    @@Type: DOMString
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'hreflang',
          $r => $r,
          $defaultValue => {null},
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'hreflang',
          $given => $given,
        }__;

  @Attr:
    @@Name: title
    @@enDesc:
      The <XA::title> attribute of the element.

      It <kwd:MUST> <I::reflect the string value
      of the <XA::title> attribute> of the node.
    @@Type: DOMString
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'title',
          $r => $r,
          $defaultValue => {null},
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'title',
          $given => $given,
        }__;

  @Attr:
    @@Name: length
    @@enDesc:
      The <XA::length> attribute of the element.

      It <kwd:MUST> <I::reflect the string value
      of the <XA::length> attribute> of the node.
    @@Type: DOMString
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@PerlDef:
        __CODE{getReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'length',
          $r => $r,
          $defaultValue => {null},
        }__;
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the attribute.
      @@@NodeReadOnlyError:
      @@@PerlDef:
        __CODE{setReflectAttrStringValue::
          $node => $self,
          $namespaceURI => {null},
          $localName => 'length',
          $given => $given,
        }__;
##AtomLinkElement

IFClsETDef:
  @IFQName: AtomPublishedElement
  @ETQName: atom|published
  @ClsQName: ManakaiAtomPublishedElement

  @IFISA: AtomDateConstruct
  @ClsISA: ManakaiAtomDateConstruct

  @enDesc:
    The <XE::atom|published> element is a Date construct
    indicating an instant in time associated with an
    event early in the life cycle of the entry.

    Typically, <XE::atom|published> will be associated with
    the initial creation or first availability of the resouce.
##AtomPublishedElement

IFClsETDef:
  @IFQName: AtomRightsElement
  @ETQName: atom|rights
  @ClsQName: ManakaiAtomRightsElement

  @IFISA: AtomTextConstruct
  @ClsISA: ManakaiAtomTextConstruct

  @enDesc:
    The <XE::atom|rights> element is a Text construct
    that conveys information about rights held in and
    over an entry or feed.
##AtomRightsElement

IFClsETDef:
  @IFQName: AtomSourceElement
  @ETQName: atom|source
  @ClsQName: ManakaiAtomSourceElement

  @IFISA: AtomElement
  @ClsISA: ManakaiAtomElement

  @Attr:
    @@Name: authorElements
    @@enDesc:
      A static list of <XE::atom|author> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|author> child element list>
        of the node.
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.authorElements.get

  @Attr:
    @@Name: categoryElements
    @@enDesc:
      A static list of <XE::atom|category> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|category> child element list>
        of the node.
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.categoryElements.get

  @Attr:
    @@Name: contributorElements
    @@enDesc:
      A static list of <XE::atom|contributor> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|contributor> child element list>
        of the node.
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.contributorElements.get

  @Attr:
    @@Name: generatorElement
    @@enDesc:
      The <XE::atom|generator> child element of the node.
    @@Type: AtomGeneratorElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|generator> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.generatorElement.get

  @Attr:
    @@Name: icon
    @@enDesc:
      The <XE::atom|icon> value of the node.

      It <kwd:MUST> <I::reflect the URI value
      of the <XE::atom|icon> child element> of the node.
    @@Type: DOMString
    @@actualType: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.icon.get
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the value.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.icon.set

  @Attr:
    @@Name: id
    @@enDesc:
      The <XE::atom|id> value of the node.

      It <kwd:MUST> <I::reflect the string value
      of the <XE::atom|id> child element> of the node.
    @@Type: DOMString
    @@actualType: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.id.get
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the value.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.id.set

  @Attr:
    @@Name: linkElements
    @@enDesc:
      A static list of <XE::atom|link> child elements of the node.
    @@Type: StaticNodeList
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|link> child element list>
        of the node.
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.linkElements.get

  @Attr:
    @@Name: logo
    @@enDesc:
      The <XE::atom|logo> value of the node.

      It <kwd:MUST> <I::reflect the URI value
      of the <XE::atom|logo> child element> of the node.
    @@Type: DOMString
    @@actualType: DOMURI
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.logo.get
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          Removes the value.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.logo.set

  @Attr:
    @@Name: rightsElement
    @@enDesc:
      The <XE::atom|rights> child element of the node.
    @@Type: AtomRightsElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|rights> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.rightsElement.get

  @Attr:
    @@Name: subtitleElement
    @@enDesc:
      The <XE::atom|subtitle> child element of the node.
    @@Type: AtomSubtitleElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|subtitle> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.subtitleElement.get

  @Attr:
    @@Name: titleElement
    @@enDesc:
      The <XE::atom|title> child element of the node.
    @@Type: AtomTitleElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|title> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.titleElement.get

  @Attr:
    @@Name: updatedElement
    @@enDesc:
      The <XE::atom|updated> child element of the node.
    @@Type: AtomUpdatedElement
    @@Get:
      @@@enDesc:
        It <kwd:MUST> <I::return a <XE::atom|updated> child element>
        of the node.
      @@@nullCase:
        @@@@enDesc:
          If the algorithm returns <DOM::null>.
      @@@NodeReadOnlyError:
      @@@disDef:
        @@@@dlp:cloneCode: ManakaiAtomFeedElement.updatedElement.get
##AtomSourceElement

IFClsETDef:
  @IFQName: AtomSubtitleElement
  @ETQName: atom|subtitle
  @ClsQName: ManakaiAtomSubtitleElement

  @IFISA: AtomTextConstruct
  @ClsISA: ManakaiAtomTextConstruct

  @enDesc:
    The <XE::atom|subtitle> element is a Text construct
    that conveys a human-readable description or subtitle for a feed.
##AtomSubtitleElement

IFClsETDef:
  @IFQName: AtomSummaryElement
  @ETQName: atom|summary
  @ClsQName: ManakaiAtomSummaryElement

  @IFISA: AtomTextConstruct
  @ClsISA: ManakaiAtomTextConstruct

  @enDesc:
    The <XE::atom|summary> element is a Text construct
    that conveys a short summary, abstract, or excerpt of an entry.
##AtomSummaryElement

IFClsETDef:
  @IFQName: AtomTitleElement
  @ETQName: atom|title
  @ClsQName: ManakaiAtomTitleElement

  @IFISA: AtomTextConstruct
  @ClsISA: ManakaiAtomTextConstruct

  @enDesc:
    The <XE::atom|title> element is a Text construct
    that conveys a human-readable title for an entry or feed.
##AtomTitleElement

IFClsETDef:
  @IFQName: AtomUpdatedElement
  @ETQName: atom|updated
  @ClsQName: ManakaiAtomUpdatedElement

  @IFISA: AtomDateConstruct
  @ClsISA: ManakaiAtomDateConstruct

  @enDesc:
    The <XE::atom|updated> element is a Date construct
    indicating the most recent instant in time when an 
    entry or feed was modified in a way the publisher considers
    significant.
##AtomPublishedElement

ElementTypeBinding:
  @Name: NodeReadOnlyError
  @ElementType:
    dx:raises
  @ShadowContent:
    @@@: MDOMX|NOMOD_THIS
    @@Description:
      @@@lang:en
      @@@@:
        If the node or a descendant of it, which
        is to be modified, is read-only.

## -- Configuration Parameters

boolCParam:
  @QName: cfg|create-child-element
  @tc:nodeStemKey:
    @@@: ccldel
    @@ForCheck: =ManakaiDOM|all
  @c:targetType: tc|Document
  @IsSupportRequired:1
  @TrueCase:
    @@c:isSupported:1
    @@enDesc:
      If the parameter is set to <DOM::true>, some DOM attributes
      that returns an element will create a child element
      when there is no element that met the condition defined
      for that DOM attribute.
  @FalseCase:
    @@c:isSupported:1
    @@IsSupportRequired:1
    @@IsDefault:1
    @@enDesc:
      If the parameter is set to <DOM::true>, some DOM attributes
      that returns an element will <EM::not> create a child element
      even when there is no element that met the condition defined
      for that DOM attribute.
  @TestC:
    @@QName: cfg.create-child-element.set.test
    @@PerlCDef:
      my $doc;
      __CODE{tc|createEmptyDocumentForTest:: $doc => $doc}__;

      my $cfg = $doc-><AG::Document.domConfig>;
      my $cp = <Q::cfg|create-child-element>;

      $test->id ('default');
      $test->assert_false ($cfg-><M::CFG.getParameter> ($cp));

      $test->id ('set.f.to.t');
      $cfg-><M::CFG.setParameter> ($cp => true);
      $test->assert_true ($cfg-><M::CFG.getParameter> ($cp));

      $test->id ('set.t.to.f');
      $cfg-><M::CFG.setParameter> ($cp => false);
      $test->assert_false ($cfg-><M::CFG.getParameter> ($cp));

      $cfg-><M::CFG.setParameter> ($cp => true);

      $test->id ('reset');
      $cfg-><M::CFG.setParameter> ($cp => null);
      $test->assert_false ($cfg-><M::CFG.getParameter> ($cp));

ResourceDef:
  @QName: CFG
  @AliasFor: c|DOMConfiguration
  @For: ManakaiDOM|DOM3

ElementTypeBinding:
  @Name: boolCParam
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@DISCore:resourceType:
      @@@@: c|DOMConfigurationParameter
      @@@For: ManakaiDOM|DOM
    @@DISCore:resourceType:
      @@@@: DISCore|Property
      @@@For: =ManakaiDOM|all
    @@For: ManakaiDOM|DOM3
    @@For: =ManakaiDOM|all
    @@Type: idl|boolean||ManakaiDOM|all