Message/DOM/XMLParser.dis

Module:
  @QName: MDOM|XMLParser
  @Namespace:
    http://suika.fam.cx/~wakaba/archive/2004/dom/xml-parser#

  @FullName:
    @@lang:en
    @@@: XML Parser

  @DISCore:author: DISCore|Wakaba
  @License: license|Perl+MPL
  @Date:
    $Date: 2005/12/29 10:21:42 $

  @DefaultFor: ManakaiDOM|ManakaiDOMLatest

  @Require:
    @@Module:
      @@@QName: MDOM|DOMLS
      @@@WithFor: ManakaiDOM|ManakaiDOMLatest

Namespace:
  @dis:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/lang#dis--
  @DOMCore:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/dom-core#
  @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#
  @idl:
    http://suika.fam.cx/~wakaba/archive/2004/dis/IDL#
  @infoset:
     http://www.w3.org/2001/04/infoset#
  @lang:
     http://suika.fam.cx/~wakaba/archive/2004/8/18/lang#
  @license:
     http://suika.fam.cx/~wakaba/archive/2004/8/18/license#
  @LSEV:
    http://www.w3.org/2002/DOMLS
  @ManakaiDOM:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/manakai-dom#
  @ManakaiDOMLS:
    http://suika.fam.cx/~wakaba/archive/2004/mdom-ls#
  @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#
  @rdf:
    http://www.w3.org/1999/02/22-rdf-syntax-ns#
  @rdfs:
    http://www.w3.org/2000/01/rdf-schema#
  @t:
    http://suika.fam.cx/~wakaba/archive/2004/dom/tree#
  @xml:
    http://www.w3.org/XML/1998/namespace
  @xmlns:
    http://www.w3.org/2000/xmlns/
  @xp:
    http://suika.fam.cx/~wakaba/archive/2004/dom/xml-parser#

## -- Features

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

ElementTypeBinding:
  @Name: FeatureVerDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: f|Feature

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

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

ResourceDef:
  @QName: Node
  @AliasFor: t|Node
  @For: ManakaiDOM|DOM

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

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

ElementTypeBinding:
  @Name: ClsDef
  @ElementType: 
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      @@@@: dis|MultipleResource
      @@@ForCheck: !ManakaiDOM|ForIF !ManakaiDOM|ForClass
    @@resourceFor:
      @@@@: ManakaiDOM|ForClass
      @@@ForCheck: ManakaiDOM|ManakaiDOM !=ManakaiDOM|ManakaiDOM
    @@For: ManakaiDOM|DOM3
    @@For: =ManakaiDOM|ManakaiDOM

    @@rdf:type:
      @@@@: DISLang|Class
      @@@ForCheck: ManakaiDOM|ForClass

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

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

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

ResourceDef:
  @QName: LSParser
  @AliasFor: DOMLS|LSParser
  @For: ManakaiDOM|DOM3

ClsDef:
  @ClsQName: ManakaiXMLParser
  
  @Implement: DOMLS|LSParser

  @f:implements:
    @@@: DOMLS|LSFeature30
    @@For: ManakaiDOM|DOM3

  @DISLang:role: DOMLS|ParserRole

  @enDesc:
    Note that the <Class::ManakaiXMLParser> reports any XML errors
    (syntax errors and / or well-formedness constraint errors)
    via the <IF::DOMCore:error-handler> registered to
    the <A::DOMLS:LSParser.domConfig> object.  Each error has
    its <A::DOMCore:DOMError.severity>, either <C::DOMCore:SEVERITY_ERROR>
    or <C::DOMCore:SEVERITY_FATAL_ERROR>.  However, their semantics
    are slight different from the ones of <QUOTE::error> and
    <QUOTE::fatal error> in XML; in this implemenetation, 
    <C::DOMCore:SEVERITY_ERROR> implies that the parsing process
    can effectively be continued to detect more errors while
    <C::DOMCore:SEVERITY_FATAL_ERROR> implies that the error
    is serious so that the result document tree and any errors
    might be far from the ones obtained when the error would not
    be found.

  @Attr:
    @@Name: domConfig
    @@enDesc:
      The configuration of the parser.

    @@Get:
      @@@Type: DOMCore|DOMConfiguration
      @@@enDesc: The DOM configuration object.
      @@@PerlDef:
        __CODE{DOMCore|getConfigObject::
          $target => $self,
          $targetHash => $self,
          $targetType => {<IFName::LSParser>},
          $result => $r,
        }__;

  @Method:
    @@ManakaiDOM:isForInternal:1
    @@ForCheck: ManakaiDOM|ForClass
    @@Operator: DISPerl|NewMethod
    @@enDesc:
      Creates a new instance of the object.
    @@Param:
      @@@Name: impl
      @@@Type: DOMLS|GLSImplementation
      @@@enDesc:
        The implementation from which the parser is created.
    @@Param:
      @@@Name: features
      @@@Type: DOMString
      @@@dis:actualType: f|FeaturesString
      @@@enDesc:
        The set of features requested for the parser.
    @@Return:
      @@@Type: DOMMain|DOMObject
      @@@dis:actualType: LSParser
      @@@enDesc:
        The newly created parser.
      @@@PerlDef:
        $r = bless {
          <H::DOMCore:implementation> => $impl,
        }, $self;

  @Method:
    @@Name: parseString
    @@enImplNote:
      Non-standard - to be removed

    @@Param:
      @@@Name: sourceText
      @@@Type: DOMString
    @@Return:
      @@@Type: Document
      @@@PerlDef:

        $self->{char} = [];
        $self->{token} = [];
        $self->{source} = $sourceText;
        $self->{xml_version} = '1.0';
        $self->{standalone} = false;
          ## Well-formedness constraint Entity Declared takes effect?
        $self->{line} = 1;
        $self->{column} = 1;

        __DEEP{
          $r = $self->_parse_DocumentEntity
                        ($self->{<H::DOMCore:implementation>});
        }__;

  @Method:
    @@Name: shiftChar
    @@ManakaiDOM:isForInternal:1
    @@ForCheck: ManakaiDOM|ForClass
    @@enDesc:
      Returns the next character.
    @@Return:
      @@@Type: idl|long||ManakaiDOM|all
      @@@enDesc:
        The code position number of the next character, if any,
        or <CODE::-2>.
      @@@PerlDef:
        if (@{$self->{char}}) {
          $r = shift @{$self->{char}};
        } else {
          my $char = substr ($self->{source}, pos ($self->{source}), 1);
          pos ($self->{source})++;

          if (length $char) {
            $r = ord $char;
            if ($r == 0x000A) {
              $self->{line}++;
              $self->{column} = 1;
            } elsif ($r == 0x000D) {
              my $next_char = substr ($self->{source},
                                      pos ($self->{source}), 1);
              if ($next_char eq "\x0A") {
                pos ($self->{source})++;
                $self->{column} = 1;
              } elsif ($next_char eq "\x85") {
                if ($self->{xml_version} eq '1.1') {
                  pos ($self->{source})++; 
                  $self->{column} = 1;
                } else {
                  $self->{column} = 0;
                }
              } else {
                $self->{column} = 1;
              }
              $r = 0x000A;
              $self->{line}++;
            } elsif (
              not ((0x0020 <= $r and $r <= 0x007E) or
                   (0x00A0 <= $r and $r <= 0xD7FF) or
                   (0xE000 <= $r and $r <= 0xFFFD) or
                   (0x10000 <= $r and $r <= 0x10FFFF)) and
              $r != 0x0009 and $r != 0x0085 and
              not ($self->{xml_version} eq '1.0' and
                   (0x007F <= $r and $r <= 0x009F))
            ) {
              my $location = {
                utf32_offset => pos ($self->{source}),
                line_number => $self->{line},
                column_number => $self->{column},
              };
              my $continue = __DOMCore:ERROR{xp|wf-legal-literal-character::
                DOMCore|location => {$location},
                xp|character-number => {$r},
              }__;
              unless ($continue) {
                __EXCEPTION{DOMLS|PARSE_ERR}__;
              }
              $self->{has_error} = true;
              $self->{column}++;
            } elsif ($r == 0x0085 or $r == 0x2028) {
              $r = 0x000A if $self->{xml_version} eq '1.1';
              $self->{line}++;
              $self->{column} = 1;
            } else {
              $self->{column}++;
            }
          } else {
            $r = -1;
          }
        }

  @Method:
    @@ManakaiDOM:isForInternal: 1
    @@Operator: ManakaiDOM|MUErrorHandler
    @@enDesc:
      When a <IF::ecore|ErrorInterface||ManakaiDOM|Perl> is <Perl::report>ed,
      then this method is invoked.
      
      The method calls the <cfg::DOMCore|error-handler> if the error is of 
      <IF::DOMCore|DOMError>.  Otherwise, the error is re-thrown so that
      corresponding <Perl::catch> clause, if any, can catch the error.
    @@Param:
      @@@Name: err
      @@@Type: ecore|ErrorInterface||ManakaiDOM|Perl
      @@@enDesc:
        The reported error object.
    @@Return:
      @@@Type: DISPerl|Any
      @@@enDesc:
        If the <P::err> is a <IF::DOMCore|DOMError>, then the return value
        of the error handler.

           {NOTE:: If the error is thrown, the method never returns.
           }
      @@@nullCase:
        @@@@enDesc:
          No error handler.
      @@@PerlDef:
        if ($err->isa (<IFName::DOMCore|DOMError||ManakaiDOM|ManakaiDOM>)) {
          __DEEP{
            A: {
              my $cfg = $self-><AG::LSParser.domConfig>;
              my $h = $cfg-><M::DOMCore|DOMConfiguration.getParameter>
                               ('error-handler');
              $r = $h-><M::DOMCore|DOMErrorHandler.handleError> ($err);
            } # A
          }__;
        } else {
          $err-><M::ecore|ErrorInterface||ManakaiDOM|Perl.throw>;
        }

  @DISPerl:dpgDef:

    /*
      XML Document Entity
      
        document := prolog element *Misc
                  - *Char RestrictedChar *Char  ;; [1]
    */
    rule DocumentEntity ($impl) : standalone {
      my $doc : return;
    
      lang:Perl {
        $doc = $impl-><M::DOMImpl.createDocument>;
        $doc-><AS::Document.strictErrorChecking> (false);
      }
    
      /*
        prolog := XMLDecl? *Misc [doctypedecl *Misc]  ;; [22]
      */
      ?lexmode 'DocumentStart';
      
      ~? (XDO) {
        &_XMLDeclaration_ ($doc => $doc);
        
        ~ (PIC) {
          ?lexmode DocumentProlog;
        } else {
          ?lexmode DocumentProlog;
        }
      } else {
        ?lexmode 'DocumentProlog';
      }
      
      // *Misc
      ~* (CDO) {
        &_CommentDeclaration_ ($doc => $doc, $parent => $doc);

        ~ (MDC) {
          ?lexmode DocumentProlog;
        } else {
          ?lexmode DocumentProlog;
        }
      } (PIO) {
        &_ProcessingInstruction_ ($doc => $doc, $parent => $doc);

        ~ (PIC) {
          ?lexmode 'DocumentProlog';
        } else {
          ?lexmode DocumentProlog;
        }
      } (S) {
        //
      }
      
      // doctypedecl
      ~? (MDO) {
        &_DocumentTypeDeclaration_ ($doc => $doc);

        ~ (MDC) {
          ?lexmode DocumentMisc;
        } else {
          ?lexmode DocumentMisc;
        }
      } else {
        lang:Perl {
          $self->{standalone} = true;
        }
        ?lexmode DocumentMisc;
      }
      
      // *Misc
      ~* (CDO) {
        &_CommentDeclaration_ ($doc => $doc, $parent => $doc);

        ~ (MDC) {
          ?lexmode DocumentMisc;
        } else {
          ?lexmode DocumentMisc;
        }
      } (PIO) {
        &_ProcessingInstruction_ ($doc => $doc, $parent => $doc);

        ~ (PIC) {
          ?lexmode 'DocumentMisc';
        } else {
          ?lexmode DocumentMisc;
        }
      } (S) {
        //
      }
      
      // Document element
      ~ (STAGO) {
        &Element_ ($doc => $doc, $parent => $doc)
          : unshift-current-token;
        ~ (TAGC) {
          ?lexmode DocumentEnd;
        } else {
          ?lexmode DocumentEnd;
        }
      } else {
        ?lexmode 'DocumentEnd';
      }
      
      // *Misc
      ~* (CDO) {
        &_CommentDeclaration_ ($doc => $doc, $parent => $doc);

        ~ (MDC) {
          ?lexmode DocumentEnd;
        } else {
          ?lexmode DocumentEnd;
        }
      } (PIO) {
        &_ProcessingInstruction_ ($doc => $doc, $parent => $doc);
        ~ (PIC) {
          ?lexmode 'DocumentEnd';
        } else {
          ?lexmode DocumentEnd;
        }
      } (S) {
        //
      }
      
      ~ (#EOF) { }

      lang:Perl {
        if ($self->{has_error}) {
          __EXCEPTION{DOMLS|PARSE_ERR::
          }__;
        }
        
        $doc-><AS::Document.strictErrorChecking> (true);
      }
    } // DocumentEntity
  
    /*
      XML Declaration
      
        XMLDecl := '<?xml' VersionInfo
                           [EncodingDecl]
                           [SDDecl]
                           [S] '?>'  ;; [23]
      
      NOTE: XML declaration is optional in XML 1.0
            while it is required in XML 1.1.
    */
    rule _XMLDeclaration_ ($doc) {
      ?lexmode XMLDeclaration;

      ~ (S) { }

      ~ (Name == 'version') {
        ~? (S) { }
        ~ (VI) { }
        ~? (S) { }

        my $ver;
        my $bad_token;

        ~ (LIT) {
          ?lexmode AttributeValueLiteral;
          
          ~ (STRING) {
            lang:Perl ($version => $token.value) {
              $ver = $version;
              $bad_token = $token;
            }
          }
    
          ~ (LIT) {
            ?lexmode XMLDeclaration;
          }
        } (LITA) {
          ?lexmode AttributeValueLiteralA;
          
          ~ (STRING) {
            lang:Perl ($version => $token.value) {
              $ver = $version;
              $bad_token = $token;
            }
          }
    
          ~ (LITA) {
            ?lexmode XMLDeclaration;
          }
        }

        lang:Perl : has-error {
          unless ($ver eq '1.0' or $ver eq '1.1') {
            my $location;
            __CODE{xp|get-location-from-token::
              $token => {$bad_token},
              $result => {$location},
            }__;
            my $continue = __DOMCore:ERROR{xp|wf-unsupported-xml-version::
              DOMCore|location => {$location},
              xp|parent => {$doc},
              infoset|version => {$ver},
              xp|error-token => {$bad_token},
            }__;
            unless ($continue) {
              __EXCEPTION{DOMLS|PARSE_ERR}__;
            }
            $self->{has_error} = true;
          }
          $doc-><AS::Document.xmlVersion> ($ver);
          $self->{xml_version} = $ver;
        }

        ~? (S) { }
      }

      ~? (Name == 'encoding') {
        ~? (S) { }
        ~ (VI) { }
        ~? (S) { }

        my $ver;
        my $bad_token;

        ~ (LIT) {
          ?lexmode AttributeValueLiteral;
          
          ~ (STRING) {
            lang:Perl ($version => $token.value) {
              $ver = $version;
              $bad_token = $token;
            }
          }
    
          ~ (LIT) {
            ?lexmode XMLDeclaration;
          }
        } (LITA) {
          ?lexmode AttributeValueLiteralA;
          
          ~ (STRING) {
            lang:Perl ($version => $token.value) {
              $ver = $version;
              $bad_token = $token;
            }
          }
    
          ~ (LITA) {
            ?lexmode XMLDeclaration;
          }
        }

        lang:Perl : has-error {
          unless ($ver =~ /\A[A-Za-z][A-Za-z0-9._-]*\z/) {
            my $location;
            __CODE{xp|get-location-from-token::
              $token => {$bad_token},
              $result => {$location},
            }__;
            my $continue = __DOMCore:ERROR{xp|wf-malformed-enc-name::
              DOMCore|location => {$location},
              xp|parent => {$doc},
              xp|name => {$ver},
              xp|error-token => {$bad_token},
            }__;
            unless ($continue) {
              __EXCEPTION{DOMLS|PARSE_ERR}__;
            }
            $self->{has_error} = true;
          }
          $doc-><AS::Document.xmlEncoding> ($ver);
        }

        ~? (S) { }
      }

      ~? (Name == 'standalone') {
        ~? (S) { }
        ~ (VI) { }
        ~? (S) { }

        my $ver;
        my $bad_token;

        ~ (LIT) {
          ?lexmode AttributeValueLiteral;
          
          ~ (STRING) {
            lang:Perl ($version => $token.value) {
              $ver = $version;
              $bad_token = $token;
            }
          }
    
          ~ (LIT) {
            ?lexmode XMLDeclaration;
          }
        } (LITA) {
          ?lexmode AttributeValueLiteralA;
          
          ~ (STRING) {
            lang:Perl ($version => $token.value) {
              $ver = $version;
              $bad_token = $token;
            }
          }
    
          ~ (LITA) {
            ?lexmode XMLDeclaration;
          }
        }

        lang:Perl : has-error {
          unless ($ver eq 'yes' or $ver eq 'no') {
            my $location;
            __CODE{xp|get-location-from-token::
              $token => {$bad_token},
              $result => {$location},
            }__;
            my $continue = __DOMCore:ERROR{xp|wf-malformed-xml-standalone::
              DOMCore|location => {$location},
              xp|parent => {$doc},
              xp|name => {$ver},
              xp|error-token => {$bad_token},
            }__;
            unless ($continue) {
              __EXCEPTION{DOMLS|PARSE_ERR}__;
            }
            $self->{has_error} = true;
          }
          $doc-><AS::Document.xmlStandalone> ($ver);
          $self->{standalone} = true if $ver eq 'yes';
        }

        ~? (S) { }
      }

      // ~ (PIC) { }
    } // _XMLDeclaration_
    
    /*
      Comment Declaration
      
        Comment := '<!--' *(Char - '-' / '-' (Char - '-'))
                   '-->'  ;; [15]
    */ 
    rule _CommentDeclaration_ ($doc, $parent) {
      ?lexmode 'CommentDeclaration';
      
      ~? (STRING) {
        lang:Perl ($data => $token.value) {
          my $com = $doc-><M::Document.createComment> ($data);
          $parent-><M::Node.appendChild> ($com);
        }
      } else {
        lang:Perl {
          my $com = $doc-><M::Document.createComment> ('');
          $parent-><M::Node.appendChild> ($com);
        }
      }
      
      ~ (COM) {
        ?lexmode MarkupDeclaration;
      } else {
        ?lexmode MarkupDeclaration;
      }
      
      // ~ (MDC) { }
    } // _CommentDeclaration
_
    rule _CommentDeclarationDTD ($doc) {
      ?lexmode 'CommentDeclaration';
      
      ~? (STRING) {
        //
      }
      
      ~ (COM) {
        ?lexmode MarkupDeclaration;
      } else {
        ?lexmode MarkupDeclaration;
      }
      
      ~ (MDC) {
        ?lexmode DTD;
      } else {
        ?lexmode DTD;
      }
    } // _CommentDeclarationDTD
   
    /*
      Processing Instruction
      
        PI := '<?' PITarget [S *Char - *Char '?>' *Char]
              '?>'  ;; [16]
    */
    rule _ProcessingInstruction_ ($doc, $parent) {
      ?lexmode 'PIName';
      
      my $pi;
      
      ~ (Name) {
        lang:Perl ($name => $token.value) : has-error {
          if (lc $name eq 'xml') {
            my $location;
            __CODE{xp|get-location-from-token::
              $token => {$token},
              $result => {$location},
            }__;
            my $continue = __DOMCore:ERROR{xp|wf-pi-target-is-xml::
              xp|name => {$name},
              DOMCore|location => {$location},
              xp|parent => {$parent},
            }__;
            unless ($continue) {
              __EXCEPTION{DOMLS|PARSE_ERR::
              }__;
            }
            $self->{has_error} = true;
          }
          ## TODO: Namespace well-formedness
          $pi = $doc-><M::Document.createProcessingInstruction>
                        ($name);
        }
      }
      
      ~ (S) {
        ?lexmode 'PIData';
        
        my $tdata;
        
        ~? (DATA) {
          lang:Perl ($data => $token.value) {
            $tdata = $data;
          }
        } else {
          lang:Perl {
            $tdata = '';
          }
        }
        
        lang:Perl {
          $pi-><AS::Node.nodeValue> ($tdata);
        }
      }
      
      lang:Perl {
        $parent-><M::Node.appendChild> ($pi);
        ## TODO: PIs in document type declaration subsets
      }
      
      // ~ (PIC) { }
    } // _ProcessingInstruction_

    rule _ProcessingInstructionDTD ($doc) {
      ?lexmode 'PIName';
      
      ~ (Name) {
      
      }
      
      ~ (S) {
        ?lexmode 'PIData';
        
        ~? (DATA) {

        }
      }
      
      ~ (PIC) {
        ?lexmode DTD;
      } else {
        ?lexmode DTD;
      }
    } // _ProcessingInstructionDTD
    
    /*
      Element content parsing mode
      
        element := EmptyElemTag /
                   STag content ETag  ;; [39]
        content := (CharData / element / Reference / CDSect /
                    PI / Comment)     ;; [43]
    */
    rule Element_ ($doc, $parent) : standalone {
      ?lexmode 'ElementContent';
      
      my $node;  // Current "parent" node
      my $nodes; // Node stack (w/o $current_node)
      my $type;  // Current "parent" element type QName
      my $types; // Element type stack (w/o $current_type)
      my $ns;    // Current in-scope namespace bindings
      my $nses;  // Namespace binding stack (w/o $current_ns)
      
      lang:Perl {
        $node = $parent;
        $nodes = [];
        $type = '';
        $types = [];
        $ns = {
          xml => <Q::xml:>,
          xmlns => <Q::xmlns:>,
        };
        $nses = [];
      }
      
      ~* : name => CONTENT
      (CharData) {
        // Character data
        lang:Perl ($data => $token.value) {
          $node-><M::Node.appendChild>
            ($doc-><M::Document.createTextNode> ($data));
        }
      } (STAGO) {
        // Start tag or empty element tag
        
        ?lexmode 'StartTag';
        
        ~ (Name) {
          my $attrs;
          lang:Perl ($name => $token.value) {
            push @{$types}, $type;
            $type = $name;
            $attrs = {};
          }
          
          ~? (S) {
            &AttributeSpecificationList
              ($doc => $doc, $attrs => $attrs);
          }

          my $el;
          
          lang:Perl {
            push @{$nses}, $ns;
            $ns = {%$ns};
            
            my %gattr;
            my %lattr;
            for my $atqname (keys %$attrs) {
              my ($pfx, $lname) = split /:/, $atqname;
              if (defined $lname) {  ## Global attribute
                ## TODO: Namespace well-formedness (lname is NCName)
                if ($pfx eq 'xmlns') {
                  my $nsuri = $attrs->{$atqname}->{value};
                  if ($lname eq 'xml' and
                      $nsuri ne <Q::xml:>) {
                    ## TODO: error
                  } elsif ($lname eq 'xmlns') {
                    ## TODO: error
                  }
                  if ($nsuri eq '') {
                    ## TODO: error in XML 1.0
                  } elsif ($nsuri eq <Q::xml:> and
                           $lname ne 'xml') {
                    ## TODO: error
                  } elsif ($nsuri eq <Q::xmlns:>) {
                    ## TODO: error
                  }
                  $ns->{$lname} = $attrs->{$atqname}->{value};
                  delete $ns->{$lname} unless length $ns->{$lname};
                } elsif ($pfx eq '') {
                  ## TODO: pfx is not NCName error
                } else {
                  if ($gattr{$pfx}->{$lname}) {
                    ## TODO: Namespace well-formedness error
                  }
                }
                $gattr{$pfx}->{$lname} = $attrs->{$atqname};
              } else {               ## Local attribute
                if ($pfx eq 'xmlns') {
                  $ns->{''} = $attrs->{xmlns}->{value};
                  delete $ns->{''} unless length $ns->{''};
                } else {
                  $lattr{$pfx} = $attrs->{$atqname};
                }
              }
            }
            
            my ($pfx, $lname) = split /:/, $type;
            my $nsuri;
            ## TODO: lname is NCName?
            if (defined $lname) {  ## Prefixed namespace
              if ($pfx eq '') {
                ## TODO: pfx is not NCName error
              }
              if (defined $ns->{$pfx}) {
                $nsuri = $ns->{$pfx};
              } else {
                ## TODO: namespace ill-formed
              }
            } else {               ## Default namespace
              $nsuri = $ns->{''};
            }
            
            $el = $doc-><M::Document.createElementNS>
                             ($nsuri, $type);
            
            if ($attrs->{xmlns}) {
              my $attr = $doc-><M::Document.createAttributeNS>
                                 (<Q::xmlns:>, 'xmlns');
              for (@{$attrs->{xmlns}->{nodes}}) {
                $attr-><M::Node.appendChild> ($_);
              }
              $el-><M::Element.setAttributeNodeNS> ($attr);
            }
            
            for my $lname (keys %lattr) {
              my $attr = $doc-><M::Document.createAttributeNS>
                                 (null, $lname);
              for (@{$lattr{$lname}->{nodes}}) {
                $attr-><M::Node.appendChild> ($_);
              }
              $el-><M::Element.setAttributeNodeNS> ($attr);
            }
            
            for my $pfx (keys %gattr) {
              for my $lname (keys %{$gattr{$pfx}}) {
                my $attr = $doc-><M::Document.createAttributeNS>
                                   ($ns->{$pfx}, $pfx.':'.$lname);
                for (@{$gattr{$pfx}->{$lname}->{nodes}}) {
                  $attr-><M::Node.appendChild> ($_);
                }
                $el-><M::Element.setAttributeNodeNS> ($attr);
              }
            }

            $node-><M::Node.appendChild> ($el);            
          }
        
          ~ (TAGC) {
            lang:Perl {
              push @{$nodes}, $node;
              $node = $el;
            }
            ?lexmode ElementContent;
          } (MTAGC) {
            lang:Perl {
              $ns = pop @{$nses};
              $type = pop @{$types};
            }
            ?lexmode ElementContent;
          } else {
            ?lexmode ElementContent;
          }
        } else {
          ?lexmode ElementContent;
        }

      } (ETAGO) {
        // End tag
        
        ?lexmode 'EndTag';

        my $is_docel;
        
        ~ (Name) {
          lang:Perl ($name => $token.value) : has-error {
            if ($name eq $type) {
              $type = pop @{$types};
              if ($type eq '') {
                $is_docel = true;
              }
              $node = pop @{$nodes};
              $ns = pop @{$nses};
            } else {
              my $location;
              __CODE{xp|get-location-from-token::
                $token => $token,
                $result => $location,
              }__;
              my $continue = __DOMCore:ERROR{xp|wf-element-type-match::
                DOMCore:location => {$location},
                xp|token => {$token},
                xp|expected-element-type => {$type},
                xp|actual-element-type => {$name},
                xp|node => {$node},
              }__;
              unless ($continue) {
                __EXCEPTION{DOMLS|PARSE_ERR}__;
              }
              $self->{has_error} = true;
            }
          }
        }
        
        ~? (S) { }

        if-true ($is_docel) {
          lang:Perl : has-error {
            if (@{$types}) {
              my $location;
              __CODE{xp|get-location-from-token::
                $token => $token,
                $result => $location,
              }__;
              for my $type (reverse @{$types}) {
                my $continue = __DOMCore:ERROR{xp|wf-no-end-tag::
                  DOMCore:location => {$location},
                  xp|token => {$token},
                  xp|expected-element-type => {$type},
                  xp|node => {$node},
                }__;
                unless ($continue) {
                  __EXCEPTION{DOMLS|PARSE_ERR}__;
                }
                $node = shift @{$nodes};
              }
              $self->{has_error} = true;
            }
          }
          return;
        }
        
        ~ (TAGC) {
          ?lexmode ElementContent;
        } else {
          ?lexmode 'ElementContent';
        }

      } (HCRO) {
        &_HexadecimalCharacterReference_
          ($doc => $doc, $parent => $node);

        ~ (REFC) {
          ?lexmode 'ElementContent';
        } else {
          ?lexmode ElementContent;
        }
      } (CRO) {
        &_NumericCharacterReference_
          ($doc => $doc, $parent => $node);

        ~ (REFC) {
          ?lexmode 'ElementContent';
        } else {
          ?lexmode ElementContent;
        }
      } (ERO) {
        &_GeneralEntityReference_
          ($doc => $doc, $parent => $node);

        ~ (REFC) {
          ?lexmode 'ElementContent';
        } else {
          ?lexmode ElementContent;
        }
      } (CDO) {
        &_CommentDeclaration_ ($doc => $doc, $parent => $node);

        ~ (MDC) {
          ?lexmode ElementContent;
        } else {
          ?lexmode ElementContent;
        }
      } (CDSO) {
        &_CDATASection_ ($doc => $doc, $parent => $node);

        ~ (MSE) {
          ?lexmode 'ElementContent';
        } else {
          ?lexmode ElementContent;
        }
      } (PIO) {
        &_ProcessingInstruction_ ($doc => $doc, $parent => $node);

        ~ (PIC) {
          ?lexmode 'ElementContent';
        } else {
          ?lexmode ElementContent;
        }
      }

      ~ (#NONE) { }
    } // Element_
    
    rule AttributeSpecificationList ($doc, $attrs)
      : standalone
    {
      ?lexmode 'StartTag';
      
      my $i;
      lang:Perl {
        $i = 0;
      }
      
      ~* (Name) {
        my $atqname;
        lang:Perl ($name => $token.value) {
          $atqname = $name;
        }
        
        my $vals;
        lang:Perl {
          if ($attrs->{$atqname}) {
            my $location;
            __CODE{xp|get-location-from-token::
              $token => $token,
              $result => $location,
            }__;
            my $continue = __DOMCore:ERROR{xp|wf-unique-att-spec::
              DOMCore:location => {$location},
              xp|token => {$token},
              xp|name => {$atqname},
            }__;
            unless ($continue) {
              __EXCEPTION{DOMLS|PARSE_ERR}__;
            }
            $self->{has_error} = true;
          }
          
          $vals = $attrs->{$atqname} = {
            nodes => [],
            value => '',
            index => $i++,
          };
        }

        ~? (S) { }
        ~ (VI) { }
        ~? (S) { }
        
        ~ (LIT) {
          &_AttributeValueSpecification_
            ($doc => $doc, $vals => $vals);

          ~ (LIT) {
            ?lexmode StartTag;
          } else {
            ?lexmode StartTag;
          }
        } (LITA) {
          &_AttributeValueSpecificationA_
            ($doc => $doc, $vals => $vals);

          ~ (LITA) {
            ?lexmode StartTag;
          } else {
            ?lexmode StartTag;
          }
        }
      } (S) : separator : terminator? { }
    } // AttributeSpecificationList
    
    rule _AttributeValueSpecification_ ($doc, $vals) {
      // ~ (LIT) { }
      ?lexmode 'AttributeValueLiteral';
      
      ~* (STRING) {
        lang:Perl ($value => $token.value) {
          $value =~ s/[\x09\x0A\x0D]/ /g;
          my $text = $doc-><M::Document.createTextNode> ($value);
          push @{$vals->{nodes}}, $text;
          $vals->{value} .= $value;
        }
      } (HCRO) {
        &_HexadecimalCharacterReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode AttributeValueLiteral;
        } else {
          ?lexmode AttributeValueLiteral;
        }
      } (CRO) {
        &_NumericCharacterReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode AttributeValueLiteral;
        } else {
          ?lexmode AttributeValueLiteral;
        }
      } (ERO) {
        // TODO: Attribute value normalization
        &_GeneralEntityReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode AttributeValueLiteral;
        } else {
          ?lexmode AttributeValueLiteral;
        }
      }
      
      // ~ (LIT) { } (LITA) { }
    } // _AttributeValueSpecification_
    
    rule _AttributeValueSpecificationA_ ($doc, $vals) {
      // ~ (LITA) { }
      ?lexmode 'AttributeValueLiteralA';
      
      ~* (STRING) {
        lang:Perl ($value => $token.value) {
          $value =~ s/[\x09\x0A\x0D]/ /g;
          my $text = $doc-><M::Document.createTextNode> ($value);
          push @{$vals->{nodes}}, $text;
          $vals->{value} .= $value;
        }
      } (HCRO) {
        &_HexadecimalCharacterReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode AttributeValueLiteralA;
        } else {
          ?lexmode AttributeValueLiteralA;
        }
      } (CRO) {
        &_NumericCharacterReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode AttributeValueLiteralA;
        } else {
          ?lexmode AttributeValueLiteralA;
        }
      } (ERO) {
        // TODO: Attribute value normalization
        &_GeneralEntityReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode AttributeValueLiteralA;
        } else {
          ?lexmode AttributeValueLiteralA;
        }
      }
      
      // ~ (LITA) { }
    } // _AttributeValueSpecificationA_
    
    /*
      CDATA Section Content Parsing Mode
    */
    rule _CDATASection_ ($doc, $parent) {
      ?lexmode 'CDATASectionContent';
        
      my $cdata;
        
      ~? (CData) {
        lang:Perl ($data => $token.value) {
          $cdata = $data;
        }
      } else {
        lang:Perl {
          $cdata = '';
        }
      }
      
      lang:Perl {
        my $cdsect = $doc-><M::Document.createCDATASection>
                             ($cdata);
        $parent-><M::Node.appendChild> ($cdsect);
      }
      
      // ~ (MSE) { }
    } // _CDATASection_
    
    rule _NumericCharacterReference_ ($doc, $parent) {
      ?lexmode 'NumericCharacterReference';
      
      ~ (NUMBER) {
        lang:Perl ($num => $token.value) : has-error {
          $num += 0;
          unless (
            ($self->{xml_version} eq '1.0' and
              ((0x0020 <= $num and $num <= 0xD7FF) or
               (0xE000 <= $num and $num <= 0xFFFD) or
               (0x10000 <= $num and $num <= 0x10FFFF) or
               $num == 0x9 or $num == 0xA or $num == 0xD)) or
            ($self->{xml_version} eq '1.1' and
              ((0x0001 <= $num and $num <= 0xD7FF) or
               (0xE000 <= $num and $num <= 0xFFFD) or
               (0x10000 <= $num and $num <= 0x10FFFF)))
          ) {
            my $location;
            __CODE{xp|get-location-from-token::
              $token => $token,
              $result => $location,
            }__;
            my $continue = __DOMCore:ERROR{xp|wf-legal-character::
              DOMCore:location => {$location},
              xp|token => {$token},
              xp|character-number => {$num},
              xp|parent => {$parent},
            }__;
            unless ($continue) {
              __EXCEPTION{DOMLS|PARSE_ERR}__;
            }
            $self->{has_error} = true;
          }
          my $ncr = $doc-><M::Document.createTextNode> (chr $num);
          $parent-><M::Node.appendChild> ($ncr);
        }
      }
      
      // ~ (REFC) { }
    } // _NumericCharacterReference_
    
    rule _NumericCharacterReferenceV_ ($doc, $vals) {
      ?lexmode 'NumericCharacterReference';
      
      ~ (NUMBER) {
        lang:Perl ($num => $token.value) : has-error {
          $num += 0;
          unless (
            ($self->{xml_version} eq '1.0' and
              ((0x0020 <= $num and $num <= 0xD7FF) or
               (0xE000 <= $num and $num <= 0xFFFD) or
               (0x10000 <= $num and $num <= 0x10FFFF) or
               $num == 0x9 or $num == 0xA or $num == 0xD)) or
            ($self->{xml_version} eq '1.1' and
              ((0x0001 <= $num and $num <= 0xD7FF) or
               (0xE000 <= $num and $num <= 0xFFFD) or
               (0x10000 <= $num and $num <= 0x10FFFF)))
          ) {
            my $location;
            __CODE{xp|get-location-from-token::
              $token => $token,
              $result => $location,
            }__;
            my $continue = __DOMCore:ERROR{xp|wf-legal-character::
              DOMCore:location => {$location},
              xp|token => {$token},
              xp|character-number => {$num},
            }__;
            unless ($continue) {
              __EXCEPTION{DOMLS|PARSE_ERR}__;
            }
            $self->{has_error} = true;
          }
          my $ncr = $doc-><M::Document.createTextNode>
                            (my $char = chr (0+$num));
          push @{$vals->{nodes}}, $ncr;
          $vals->{value} .= $char;
        }
      }
      
      // ~ (REFC) { }
    } // _NumericCharacterReferenceV_
    
    rule _HexadecimalCharacterReference_ ($doc, $parent) {
      ?lexmode 'HexadecimalCharacterReference';
      
      ~ (Hex) {
        lang:Perl ($num => $token.value) : has-error {
          $num += 0;
          unless (
            ($self->{xml_version} eq '1.0' and
              ((0x0020 <= $num and $num <= 0xD7FF) or
               (0xE000 <= $num and $num <= 0xFFFD) or
               (0x10000 <= $num and $num <= 0x10FFFF) or
               $num == 0x9 or $num == 0xA or $num == 0xD)) or
            ($self->{xml_version} eq '1.1' and
              ((0x0001 <= $num and $num <= 0xD7FF) or
               (0xE000 <= $num and $num <= 0xFFFD) or
               (0x10000 <= $num and $num <= 0x10FFFF)))
          ) {
            my $location;
            __CODE{xp|get-location-from-token::
              $token => $token,
              $result => $location,
            }__;
            my $continue = __DOMCore:ERROR{xp|wf-legal-character::
              DOMCore:location => {$location},
              xp|token => {$token},
              xp|character-number => {$num},
              xp|parent => {$parent},
            }__;
            unless ($continue) {
              __EXCEPTION{DOMLS|PARSE_ERR}__;
            }
            $self->{has_error} = true;
          }
          my $ncr = $doc-><M::Document.createTextNode>
                      (chr hex $num);
          $parent-><M::Node.appendChild> ($ncr);
        }
      }
      
      // ~ (REFC) { }
    } // _HexadecimalCharacterReference_
    
    rule _HexadecimalCharacterReferenceV_ ($doc, $vals) {
      ?lexmode 'HexadecimalCharacterReference';
      
      ~ (Hex) {
        lang:Perl ($num => $token.value) : has-error {
          $num += 0;
          unless (
            ($self->{xml_version} eq '1.0' and
              ((0x0020 <= $num and $num <= 0xD7FF) or
               (0xE000 <= $num and $num <= 0xFFFD) or
               (0x10000 <= $num and $num <= 0x10FFFF) or
               $num == 0x9 or $num == 0xA or $num == 0xD)) or
            ($self->{xml_version} eq '1.1' and
              ((0x0001 <= $num and $num <= 0xD7FF) or
               (0xE000 <= $num and $num <= 0xFFFD) or
               (0x10000 <= $num and $num <= 0x10FFFF)))
          ) {
            my $location;
            __CODE{xp|get-location-from-token::
              $token => $token,
              $result => $location,
            }__;
            my $continue = __DOMCore:ERROR{xp|wf-legal-character::
              DOMCore:location => {$location},
              xp|token => {$token},
              xp|character-number => {$num},
            }__;
            unless ($continue) {
              __EXCEPTION{DOMLS|PARSE_ERR}__;
            }
            $self->{has_error} = true;
          }
          my $ncr = $doc-><M::Document.createTextNode>
                      (my $char = chr hex $num);
          push @{$vals->{nodes}}, $ncr;
          $vals->{value} .= $char;
        }
      }
      
      // ~ (REFC) { }
    } // _HexadecimalCharacterReferenceV_
    
    rule _GeneralEntityReference_ ($doc, $parent) {
      // TODO: Expansion
      ?lexmode 'EntityReference';
      
      ~ (Name) {
        lang:Perl ($name => $token.value) {
          ## TODO: Namespace well-formedness
          ## TODO: Entity declared constraints
          my $er = $doc-><M::Document.createEntityReference>
                           ($name);
          $parent-><M::Node.appendChild> ($er);
        }
      }
      
      // ~ (REFC) { }
    } // _GeneralEntityReference_
    
    rule _GeneralEntityReferenceV_ ($doc, $vals) {
      // TODO: Expansion
      ?lexmode 'EntityReference';
      
      ~ (Name) {
        lang:Perl ($name => $token.value) {
          ## TODO: Namespace well-formedness
          ## TODO: Entity declared constraints
          my $er = $doc-><M::Document.createEntityReference>
                           ($name);
          push @{$vals->{nodes}}, $er;
        }
      }
      
      // ~ (REFC) { }
    } // _GeneralEntityReferenceV_

    /*
      Document Type Declaration
    */
    rule _DocumentTypeDeclaration_ ($doc) {
      ?lexmode MarkupDeclaration;
      
      ~ (Name == 'DOCTYPE') { }
      
      ~ (S) { }
      
      // Document type name
      ~ (Name) {
      
      }

      ~? (S) {
        ~? (Name == 'PUBLIC') {
          ~ (S) { }
  
          &PubidLiteral ($doc => $doc);
  
          ~ (S) { }
  
          &SystemLiteral ($doc => $doc);
  
          ~? (S) { }
        } (Name == 'SYSTEM') {
          ~ (S) { }
  
          &SystemLiteral ($doc => $doc);
  
          ~? (S) { }
        }
      }
      
      ~? (DSO) {
        &InternalSubset ($doc => $doc);

        ~ (DSC) {
          ?lexmode MarkupDeclaration;
        } else {
          ?lexmode MarkupDeclaration;
        }

        ~? (S) { }
      }
      
      // TODO: set $self->{standalone} true if only internal subset
      //       with no param ref

      // ~ (MDC) { }
    } // _DocumentTypeDeclaration_

    rule PubidLiteral ($doc) {
      ~ (LIT) {
        ?lexmode SystemLiteral;

        ~? (STRING) {
          // TODO: Charrange check & normalization is required

        }

        ~ (LIT) {
          ?lexmode MarkupDeclaration;
        } else {
          ?lexmode MarkupDeclaration;
        }
      } (LITA) {
        ?lexmode SystemLiteralA;

        ~? (STRING) {
          // TODO: Charrange check & normalization is required

        }

        ~ (LITA) {
          ?lexmode MarkupDeclaration;
        } else {
          ?lexmode MarkupDeclaration;
        }
      }
    } // PubidLiteral

    rule SystemLiteral ($doc) {
      ~ (LIT) {
        ?lexmode SystemLiteral;
        &_SystemLiteral ($doc => $doc);
      } (LITA) {
        ?lexmode SystemLiteralA;
        &_SystemLiteral ($doc => $doc);
      }
    } // SystemLiteral

    rule _SystemLiteral ($doc) {
      ~? (STRING) {

      }

      ~ (LIT) {
        ?lexmode MarkupDeclaration;
      } (LITA) {
        ?lexmode MarkupDeclaration;
      } else {
        ?lexmode MarkupDeclaration;
      }
    } // _SystemLiteral

    /*
      DTD Internal Subset
      
        intSubset := *(markupdecl / DeclSep)  ;; [28b]
    */
    rule InternalSubset ($doc) {
      ?lexmode DTD;

      ~* (MDO) {
        ?lexmode MarkupDeclaration;

        ~ (Name == 'ELEMENT') {
          &_ElementDeclaration ($doc => $doc);
        } (Name == 'ATTLIST') {
          &_AttlistDeclaration ($doc => $doc);
        } (Name == 'ENTITY') {
          &_EntityDeclaration ($doc => $doc);
        } (Name == 'NOTATION') {
          &_NotationDeclaration ($doc => $doc);
        }
      } (S) {
        //
      } (CDO) {
        &_CommentDeclarationDTD ($doc => $doc);
      } (PIO) {
        &_ProcessingInstructionDTD ($doc => $doc);
      } (PERO) {
        ?lexmode EntityReference;

        ~ (Name) {

        }

        ~ (REFC) {
          ?lexmode DTD;
        } else {
          ?lexmode DTD;
        }
      }
    } // InternalSubset

    rule _ElementDeclaration ($doc) {
      // ~ (MDO) { }
      // ?lexmode MarkupDeclaration
      // ~ (Name == 'Element') { }

      ~ (S) { }

      ~ (Name) {

      }

      ?lexmode ElementDeclaration;

      ~ (S) { }

      // contentspec
      ~ (MGO) {
        &_ContentModel ($doc => $doc);
      } (Name == 'EMPTY') {

      } (Name == 'ANY') {

      }

      ~? (S) { }

      ~ (MDC) {
        ?lexmode DTD;
      } else {
        ?lexmode DTD;
      }
    } // _ElementDeclaration

    rule _ContentModel ($doc) {
      // ~ (MGO) { }
      
      ~? (S) { }

      ~ (Name) {
        // Element content model
        &_ModelGroup ($doc => $doc)
          : unshift-current-token;

        ~? (OPT) {

        } (REP) {

        } (PLUS) {

        }

      } (MDO) {
        &_ModelGroup ($doc => $doc)
          : unshift-current-token;

        ~? (OPT) {

        } (REP) {

        } (PLUS) {

        }

      } (PCDATA) {
        // Mixed content declaration
        ~? (S) { }

        ~* (OR) {
          ~? (S) { }

          ~ (Name) {

          }

          ~? (S) { }
        }

        ~ (MGC) { }

        ~? (REP) {
      
        } else {
          // TODO: error if |Name|
        }


      }
    } // _ContentModel

    rule _ModelGroup ($doc)
      : standalone
      : recursive
    {
      // ~ (MGO) { }
      // ~? (S) { }

      &ContentParticle ($doc => $doc);

      ~? (S) { }

      ~? (OR) {
        ~? (S) { }
  
        &ContentParticle ($doc => $doc);

        ~? (S) { }

        ~* (OR) {
          ~? (S) { }

          &ContentParticle ($doc => $doc);

          ~? (S) { }
        }

      } (SEQ) {
        ~? (S) { }
  
        &ContentParticle ($doc => $doc);

        ~? (S) { }

        ~* (SEQ) {
          ~? (S) { }

          &ContentParticle ($doc => $doc);

          ~? (S) { }
        }

      }

      ~ (MGC) { }
    } // _ModelGroup
    
    rule ContentParticle ($doc) {
      ~ (Name) {

      } (MGO) {
        ~? (S) { }
   
        &_ModelGroup ($doc => $doc);
      }

      ~? (OPT) {

      } (REP) {

      } (PLUS) {

      }
    } // ContentParticle

    rule _AttlistDeclaration ($doc) {
      // ~ (MDO) { }
      // ~ (Name == 'ATTLIST') { }

      ?lexmode AttlistDeclaration;

      ~ (S) { }

      ~ (Name) {

      }
  
      ~? (S) { }

      ~* (Name) {

        ~ (S) { }
        
        // AttType
        ~ (Name == 'NOTATION') {
          ~ (S) { }

          ~ (EGO) {
            ~? (S) { }

            ~ (Name) {

              ~? (S) { }
            } (OR) : separator {
              ~? (S) { }
            }

            ~ (EGC) { }
          }
        } (Name) {
          // TODO: check keyword
        
        } (EGO) {
          ?lexmode Enumeration;

          ~? (S) { }

          ~ (Nmtoken) {

            ~? (S) { }
          } (OR) : separator {
            ~? (S) { }
          }

          ~ (EGC) {
            ?lexmode AttlistDeclaration;
          } else {
            ?lexmode AttlistDeclaration;
          }

        }

        ~ (S) { }

        // DefaultDecl
        ~ (RNI) {
          ~ (Name == 'REQUIRED') {

          } (Name == 'IMPLIED') {

          } (Name == 'FIXED') {
            ~ (S) { }
            
            ~ (LIT) {
              my $vals;
              lang:Perl {
                $vals = [];
              }

              &_AttributeValueSpecification_ ($doc => $doc, $vals => $vals);

              ~ (LIT) {
                ?lexmode AttlistDeclaration;
              } else {
                ?lexmode AttlistDeclaration;
              }
            } (LITA) {
              my $vals;
              lang:Perl {
                $vals = [];
              }

              &_AttributeValueSpecificationA_ ($doc => $doc, $vals => $vals);

              ~ (LIT) {
                ?lexmode AttlistDeclaration;
              } else {
                ?lexmode AttlistDeclaration;
              }
            }
          }

        } (LIT) {
          my $vals;
          lang:Perl {
            $vals = [];
          }

          &_AttributeValueSpecification_ ($doc => $doc, $vals => $vals);

          ~ (LIT) {
            ?lexmode AttlistDeclaration;
          } else {
            ?lexmode AttlistDeclaration;
          }
        } (LITA) {
          my $vals;
          lang:Perl {
            $vals = [];
          }

          &_AttributeValueSpecificationA_ ($doc => $doc, $vals => $vals);

          ~ (LITA) {
            ?lexmode AttlistDeclaration;
          } else {
            ?lexmode AttlistDeclaration;
          }
        }

      } (S) : separator : terminator? {
        //
      }

      ~ (MDC) {
        ?lexmode DTD;
      } else {
        ?lexmode DTD;
      }
    } // _AttlistDeclaration

    rule _EntityDeclaration ($doc) {
      // ~ (MDO) { }
      // ~ (Name == ENTITY) { }

      ~ (S) { }

      ~? (PERO) {
        ~ (S) { }
      }

      ~ (Name) {

      } 

      ~ (S) { }

      ~ (LIT) {
        &_EntityValue ($doc => $doc);
      } (LITA) {
        &_EntityValueA ($doc => $doc);
      } (Name == 'PUBLIC') {
        ~ (S) { }

        &PubidLiteral ($doc => $doc);

        ~ (S) { }

        &SystemLiteral ($doc => $doc);
      } (Name == 'SYSTEM') {
        ~ (S) { }

        &SystemLiteral ($doc => $doc);
      }

      ~? (S) {
        ~? (Name == 'NDATA') {
          // TODO: error if parameter entity

          ~ (S) { }
  
          ~ (Name) {
  
          }

          ~? (S) { }
        }
      }

      ~ (MDC) {
        ?lexmode DTD;
      } else {
        ?lexmode DTD;
      }
    } // _EntityDeclaration

    rule _NotationDeclaration ($doc) {
      // ~ (MDO) { }
      // ~ (Name == NOTATION) { }

      ~ (S) { }

      ~ (Name) {

      } 

      ~ (S) { }

      ~ (Name == 'PUBLIC') {
        ~ (S) { }

        &PubidLiteral ($doc => $doc);

        ~? (S) {
          ~? (LIT) {
            ?lexmode SystemLiteral;
            &_SystemLiteral ($doc => $doc);

            ~? (S) { }
          } (LITA) {
            ?lexmode SystemLiteralA;
            &_SystemLiteral ($doc => $doc);

            ~? (S) { }
          }
        }
      } (Name == 'SYSTEM') {
        ~ (S) { }

        &SystemLiteral ($doc => $doc);

        ~? (S) { }
      }

      ~ (MDC) {
        ?lexmode DTD;
      } else {
        ?lexmode DTD;
      }
    } // _NotationDeclaration
 
    rule _EntityValue ($doc) {
      ?lexmode EntityValue;

      my $vals;
      lang:Perl {
        $vals = [];
      }

      ~* (STRING) {

      } (PERO) {
        ?lexmode EntityDeclaration;

        ~ (Name) {

        }

        ~ (REFC) {
          ?lexmode EntityValue;
        } else {
          ?lexmode EntityValue;
        }
      } (HCRO) {
        &_HexadecimalCharacterReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode EntityValue;
        } else {
          ?lexmode EntityValue;
        }
      } (CRO) {
        &_NumericCharacterReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode EntityValue;
        } else {
          ?lexmode EntityValue;
        }
      } (ERO) {
        &_GeneralEntityReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode EntityValue;
        } else {
          ?lexmode EntityValue;
        }
      }

      ~ (LIT) {
        ?lexmode MarkupDeclaration;
      } (LITA) {
        ?lexmode MarkupDeclaration;
      } else {
        ?lexmode MarkupDeclaration;
      }
    } // _EntityValue

    rule _EntityValueA ($doc) {
      ?lexmode EntityValueA;

      my $vals;
      lang:Perl {
        $vals = [];
      }

      ~* (STRING) {

      } (PERO) {
        ?lexmode EntityDeclaration;

        ~ (Name) {

        }

        ~ (REFC) {
          ?lexmode EntityValueA;
        } else {
          ?lexmode EntityValueA;
        }
      } (HCRO) {
        &_HexadecimalCharacterReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode EntityValueA;
        } else {
          ?lexmode EntityValueA;
        }
      } (CRO) {
        &_NumericCharacterReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode EntityValueA;
        } else {
          ?lexmode EntityValueA;
        }
      } (ERO) {
        &_GeneralEntityReferenceV_
          ($doc => $doc, $vals => $vals);

        ~ (REFC) {
          ?lexmode EntityValueA;
        } else {
          ?lexmode EntityValueA;
        }
      }

      ~ (LITA) {
        ?lexmode MarkupDeclaration;
      } else {
        ?lexmode MarkupDeclaration;
      }
    } // _EntityValueA

    
    /*
      XML Name
    */
    lexmode NameChar {
      $NameStartChar10 := [
        '_' ':'
        // Letter
          // BaseChar
          U+0041..U+005A U+0061..U+007A U+00C0..U+00D6
          U+00D8..U+00F6 U+00F8..U+00FF U+0100..U+0131
          U+0134..U+013E U+0141..U+0148 U+014A..U+017E
          U+0180..U+01C3 U+01CD..U+01F0 U+01F4..U+01F5
          U+01FA..U+0217 U+0250..U+02A8 U+02BB..U+02C1
          U+0386 U+0388..U+038A U+038C U+038E..U+03A1
          U+03A3..U+03CE U+03D0..U+03D6 U+03DA U+03DC
          U+03DE U+03E0 U+03E2..U+03F3 U+0401..U+040C
          U+040E..U+044F U+0451..U+045C U+045E..U+0481
          U+0490..U+04C4 U+04C7..U+04C8 U+04CB..U+04CC
          U+04D0..U+04EB U+04EE..U+04F5 U+04F8..U+04F9
          U+0531..U+0556 U+0559 U+0561..U+0586
          U+05D0..U+05EA U+05F0..U+05F2 U+0621..U+063A
          U+0641..U+064A U+0671..U+06B7 U+06BA..U+06BE
          U+06C0..U+06CE U+06D0..U+06D3 U+06D5
          U+06E5..U+06E6 U+0905..U+0939 U+093D
          U+0958..U+0961 U+0985..U+098C U+098F..U+0990
          U+0993..U+09A8 U+09AA..U+09B0 U+09B2
          U+09B6..U+09B9 U+09DC..U+09DD U+09DF..U+09E1
          U+09F0..U+09F1 U+0A05..U+0A0A U+0A0F..U+0A10
          U+0A13..U+0A28 U+0A2A..U+0A30 U+0A32..U+0A33
          U+0A35..U+0A36 U+0A38..U+0A39 U+0A59..U+0A5C
          U+0A5E U+0A72..U+0A74 U+0A85..U+0A8B U+0A8D
          U+0A8F..U+0A91 U+0A93..U+0AA8 U+0AAA..U+0AB0
          U+0AB2..U+0AB3 U+0AB5..U+0AB9 U+0ABD U+0AE0
          U+0B05..U+0B0C U+0B0F..U+0B10 U+0B13..U+0B28
          U+0B2A..U+0B30 U+0B32..U+0B33 U+0B36..U+0B39
          U+0B3D U+0B5C..U+0B5D U+0B5F..U+0B61
          U+0B85..U+0B8A U+0B8E..U+0B90 U+0B92..U+0B95
          U+0B99..U+0B9A U+0B9C U+0B9E..U+0B9F
          U+0BA3..U+0BA4 U+0BA8..U+0BAA U+0BAE..U+0BB5
          U+0BB7..U+0BB9 U+0C05..U+0C0C U+0C0E..U+0C10
          U+0C12..U+0C28 U+0C2A..U+0C33 U+0C35..U+0C39
          U+0C60..U+0C61 U+0C85..U+0C8C U+0C8E..U+0C90
          U+0C92..U+0CA8 U+0CAA..U+0CB3 U+0CB5..U+0CB9
          U+0CDE U+0CE0..U+0CE1 U+0D05..U+0D0C
          U+0D0E..U+0D10 U+0D12..U+0D28 U+0D2A..U+0D39
          U+0D60..U+0D61 U+0E01..U+0E2E U+0E30
          U+0E32..U+0E33 U+0E40..U+0E45 U+0E81..U+0E82
          U+0E84 U+0E87..U+0E88 U+0E8A U+0E8D
          U+0E94..U+0E97 U+0E99..U+0E9F U+0EA1..U+0EA3
          U+0EA5 U+0EA7 U+0EAA..U+0EAB U+0EAD..U+0EAE
          U+0EB0 U+0EB2..U+0EB3 U+0EBD U+0EC0..U+0EC4
          U+0F40..U+0F47 U+0F49..U+0F69 U+10A0..U+10C5
          U+10D0..U+10F6 U+1100 U+1102..U+1103
          U+1105..U+1107 U+1109 U+110B..U+110C
          U+110E..U+1112 U+113C U+113E U+1140 U+114C
          U+114E U+1150 U+1154..U+1155 U+1159
          U+115F..U+1161 U+1163 U+1165 U+1167 U+1169
          U+116D..U+116E U+1172..U+1173 U+1175 U+119E
          U+11A8 U+11AB U+11AE..U+11AF U+11B7..U+11B8
          U+11BA U+11BC..U+11C2 U+11EB U+11F0 U+11F9
          U+1E00..U+1E9B U+1EA0..U+1EF9 U+1F00..U+1F15
          U+1F18..U+1F1D U+1F20..U+1F45 U+1F48..U+1F4D
          U+1F50..U+1F57 U+1F59 U+1F5B U+1F5D
          U+1F5F..U+1F7D U+1F80..U+1FB4 U+1FB6..U+1FBC
          U+1FBE U+1FC2..U+1FC4 U+1FC6..U+1FCC
          U+1FD0..U+1FD3 U+1FD6..U+1FDB U+1FE0..U+1FEC
          U+1FF2..U+1FF4 U+1FF6..U+1FFC U+2126
          U+212A..U+212B U+212E U+2180..U+2182
          U+3041..U+3094 U+30A1..U+30FA U+3105..U+312C
          U+AC00..U+D7A3
          // Ideographic
          U+4E00..U+9FA5 U+3007 U+3021..U+3029
      ];
      $NameChar10 := [
        '.' '-' '_' ':'
        // Letter
          // BaseChar
          U+0041..U+005A U+0061..U+007A U+00C0..U+00D6
          U+00D8..U+00F6 U+00F8..U+00FF U+0100..U+0131
          U+0134..U+013E U+0141..U+0148 U+014A..U+017E
          U+0180..U+01C3 U+01CD..U+01F0 U+01F4..U+01F5
          U+01FA..U+0217 U+0250..U+02A8 U+02BB..U+02C1
          U+0386 U+0388..U+038A U+038C U+038E..U+03A1
          U+03A3..U+03CE U+03D0..U+03D6 U+03DA U+03DC
          U+03DE U+03E0 U+03E2..U+03F3 U+0401..U+040C
          U+040E..U+044F U+0451..U+045C U+045E..U+0481
          U+0490..U+04C4 U+04C7..U+04C8 U+04CB..U+04CC
          U+04D0..U+04EB U+04EE..U+04F5 U+04F8..U+04F9
          U+0531..U+0556 U+0559 U+0561..U+0586
          U+05D0..U+05EA U+05F0..U+05F2 U+0621..U+063A
          U+0641..U+064A U+0671..U+06B7 U+06BA..U+06BE
          U+06C0..U+06CE U+06D0..U+06D3 U+06D5
          U+06E5..U+06E6 U+0905..U+0939 U+093D
          U+0958..U+0961 U+0985..U+098C U+098F..U+0990
          U+0993..U+09A8 U+09AA..U+09B0 U+09B2
          U+09B6..U+09B9 U+09DC..U+09DD U+09DF..U+09E1
          U+09F0..U+09F1 U+0A05..U+0A0A U+0A0F..U+0A10
          U+0A13..U+0A28 U+0A2A..U+0A30 U+0A32..U+0A33
          U+0A35..U+0A36 U+0A38..U+0A39 U+0A59..U+0A5C
          U+0A5E U+0A72..U+0A74 U+0A85..U+0A8B U+0A8D
          U+0A8F..U+0A91 U+0A93..U+0AA8 U+0AAA..U+0AB0
          U+0AB2..U+0AB3 U+0AB5..U+0AB9 U+0ABD U+0AE0
          U+0B05..U+0B0C U+0B0F..U+0B10 U+0B13..U+0B28
          U+0B2A..U+0B30 U+0B32..U+0B33 U+0B36..U+0B39
          U+0B3D U+0B5C..U+0B5D U+0B5F..U+0B61
          U+0B85..U+0B8A U+0B8E..U+0B90 U+0B92..U+0B95
          U+0B99..U+0B9A U+0B9C U+0B9E..U+0B9F
          U+0BA3..U+0BA4 U+0BA8..U+0BAA U+0BAE..U+0BB5
          U+0BB7..U+0BB9 U+0C05..U+0C0C U+0C0E..U+0C10
          U+0C12..U+0C28 U+0C2A..U+0C33 U+0C35..U+0C39
          U+0C60..U+0C61 U+0C85..U+0C8C U+0C8E..U+0C90
          U+0C92..U+0CA8 U+0CAA..U+0CB3 U+0CB5..U+0CB9
          U+0CDE U+0CE0..U+0CE1 U+0D05..U+0D0C
          U+0D0E..U+0D10 U+0D12..U+0D28 U+0D2A..U+0D39
          U+0D60..U+0D61 U+0E01..U+0E2E U+0E30
          U+0E32..U+0E33 U+0E40..U+0E45 U+0E81..U+0E82
          U+0E84 U+0E87..U+0E88 U+0E8A U+0E8D
          U+0E94..U+0E97 U+0E99..U+0E9F U+0EA1..U+0EA3
          U+0EA5 U+0EA7 U+0EAA..U+0EAB U+0EAD..U+0EAE
          U+0EB0 U+0EB2..U+0EB3 U+0EBD U+0EC0..U+0EC4
          U+0F40..U+0F47 U+0F49..U+0F69 U+10A0..U+10C5
          U+10D0..U+10F6 U+1100 U+1102..U+1103
          U+1105..U+1107 U+1109 U+110B..U+110C
          U+110E..U+1112 U+113C U+113E U+1140 U+114C
          U+114E U+1150 U+1154..U+1155 U+1159
          U+115F..U+1161 U+1163 U+1165 U+1167 U+1169
          U+116D..U+116E U+1172..U+1173 U+1175 U+119E
          U+11A8 U+11AB U+11AE..U+11AF U+11B7..U+11B8
          U+11BA U+11BC..U+11C2 U+11EB U+11F0 U+11F9
          U+1E00..U+1E9B U+1EA0..U+1EF9 U+1F00..U+1F15
          U+1F18..U+1F1D U+1F20..U+1F45 U+1F48..U+1F4D
          U+1F50..U+1F57 U+1F59 U+1F5B U+1F5D
          U+1F5F..U+1F7D U+1F80..U+1FB4 U+1FB6..U+1FBC
          U+1FBE U+1FC2..U+1FC4 U+1FC6..U+1FCC
          U+1FD0..U+1FD3 U+1FD6..U+1FDB U+1FE0..U+1FEC
          U+1FF2..U+1FF4 U+1FF6..U+1FFC U+2126
          U+212A..U+212B U+212E U+2180..U+2182
          U+3041..U+3094 U+30A1..U+30FA U+3105..U+312C
          U+AC00..U+D7A3
          // Ideographic
          U+4E00..U+9FA5 U+3007 U+3021..U+3029
        // Digit
        U+0030..U+0039 U+0660..U+0669 U+06F0..U+06F9
        U+0966..U+096F U+09E6..U+09EF U+0A66..U+0A6F
        U+0AE6..U+0AEF U+0B66..U+0B6F U+0BE7..U+0BEF
        U+0C66..U+0C6F U+0CE6..U+0CEF U+0D66..U+0D6F
        U+0E50..U+0E59 U+0ED0..U+0ED9 U+0F20..U+0F29
        // CombiningChar
        U+0300..U+0345 U+0360..U+0361 U+0483..U+0486
        U+0591..U+05A1 U+05A3..U+05B9 U+05BB..U+05BD
        U+05BF U+05C1..U+05C2 U+05C4 U+064B..U+0652
        U+0670 U+06D6..U+06DC U+06DD..U+06DF
        U+06E0..U+06E4 U+06E7..U+06E8 U+06EA..U+06ED
        U+0901..U+0903 U+093C U+093E..U+094C U+094D
        U+0951..U+0954 U+0962..U+0963 U+0981..U+0983
        U+09BC U+09BE U+09BF U+09C0..U+09C4
        U+09C7..U+09C8 U+09CB..U+09CD U+09D7
        U+09E2..U+09E3 U+0A02 U+0A3C U+0A3E U+0A3F
        U+0A40..U+0A42 U+0A47..U+0A48 U+0A4B..U+0A4D
        U+0A70..U+0A71 U+0A81..U+0A83 U+0ABC
        U+0ABE..U+0AC5 U+0AC7..U+0AC9 U+0ACB..U+0ACD
        U+0B01..U+0B03 U+0B3C U+0B3E..U+0B43
        U+0B47..U+0B48 U+0B4B..U+0B4D U+0B56..U+0B57
        U+0B82..U+0B83 U+0BBE..U+0BC2 U+0BC6..U+0BC8
        U+0BCA..U+0BCD U+0BD7 U+0C01..U+0C03
        U+0C3E..U+0C44 U+0C46..U+0C48 U+0C4A..U+0C4D
        U+0C55..U+0C56 U+0C82..U+0C83 U+0CBE..U+0CC4
        U+0CC6..U+0CC8 U+0CCA..U+0CCD U+0CD5..U+0CD6
        U+0D02..U+0D03 U+0D3E..U+0D43 U+0D46..U+0D48
        U+0D4A..U+0D4D U+0D57 U+0E31 U+0E34..U+0E3A
        U+0E47..U+0E4E U+0EB1 U+0EB4..U+0EB9
        U+0EBB..U+0EBC U+0EC8..U+0ECD U+0F18..U+0F19
        U+0F35 U+0F37 U+0F39 U+0F3E U+0F3F
        U+0F71..U+0F84 U+0F86..U+0F8B U+0F90..U+0F95
        U+0F97 U+0F99..U+0FAD U+0FB1..U+0FB7 U+0FB9
        U+20D0..U+20DC U+20E1 U+302A..U+302F U+3099
        U+309A
        // Extender
        U+00B7 U+02D0 U+02D1 U+0387 U+0640 U+0E46
        U+0EC6 U+3005 U+3031..U+3035 U+309D..U+309E
        U+30FC..U+30FE
      ];
      
      $NameStartChar11 := [
        ':' '_'
        'A' 'B' 'C' 'D' 'E' 'F' 'G' 'H' 'I' 'J' 'K' 'L' 'M'
        'N' 'O' 'P' 'Q' 'R' 'S' 'T' 'U' 'V' 'W' 'X' 'Y' 'Z'
        'a' 'b' 'c' 'd' 'e' 'f' 'g' 'h' 'i' 'j' 'k' 'l' 'm'
        'n' 'o' 'p' 'q' 'r' 's' 't' 'u' 'v' 'w' 'x' 'y' 'z'
        U+00C0..U+00D6 U+00D8..U+00F6 U+00F8..U+02FF
        U+0370..U+037D U+037F..U+1FFF U+200C..U+200D
        U+2070..U+218F U+2C00..U+2FEF U+3001..U+D7FF
        U+F900..U+FDCF U+FDF0..U+FFFD U+10000..U+EFFFF
      ];
      $NameChar11 := [
        '-' '.' '0' '1' '2' '3' '4' '5' '6' '7' '8' '9'
        U+00B7 U+0300..U+036F U+203F..U+2040
        // NameStartChar
        ':' '_'
        'A' 'B' 'C' 'D' 'E' 'F' 'G' 'H' 'I' 'J' 'K' 'L' 'M'
        'N' 'O' 'P' 'Q' 'R' 'S' 'T' 'U' 'V' 'W' 'X' 'Y' 'Z'
        'a' 'b' 'c' 'd' 'e' 'f' 'g' 'h' 'i' 'j' 'k' 'l' 'm'
        'n' 'o' 'p' 'q' 'r' 's' 't' 'u' 'v' 'w' 'x' 'y' 'z'
        U+00C0..U+00D6 U+00D8..U+00F6 U+00F8..U+02FF
        U+0370..U+037D U+037F..U+1FFF U+200C..U+200D
        U+2070..U+218F U+2C00..U+2FEF U+3001..U+D7FF
        U+F900..U+FDCF U+FDF0..U+FFFD U+10000..U+EFFFF
      ];
    } // NameChar

    lexmode Name
      : extends => 'NameChar'
    {
      Name : value := $NameStartChar11 $NameChar11*;
    } // Name

    lexmode Nmtoken
      : extends => 'NameChar'
    {
      Nmtoken : value := $NameChar11*;
    } // Nmtoken
    
    /*
      Space
    */
    lexmode S {
      S := [U+0009 U+000A U+000D U+0020]+;
    } // S
    
    /*
      Document end scanning mode
    */
    lexmode DocumentEnd
      : standalone
      : extends => 'S'
    {
      /*
        Processing instruction
      */
      PIO := ['<'] ['?'];
      
      /*
        Comment declaration
      */
      CDO := ['<'] ['!'] ['-'] ['-'];
    } // DocumentEnd

    /*
      Document misc scanning mode
      
      This mode scans |Misc| constructions as well
      as document element's start tag.
    */
    lexmode DocumentMisc
      : standalone
      : extends => 'DocumentEnd'
    {
      /*
        Document element start tag
      */
      STAGO := ['<'];
    } // DocumentMisc
    
    /*
      Document prolog scanning mode
    */
    lexmode DocumentProlog
      : standalone
      : extends => 'DocumentMisc'
    {
      /*
        |DOCTYPE| declaration
      */
      MDO := ['<'] ['!'];
    } // DocumentProlog
    
    /*
      Document start scanning mode
    */
    lexmode DocumentStart
      : initial
      : standalone
      : extends => 'DocumentProlog'
    {
      /*
        XML declaration
      */
      XDO := ['<'] ['?'] ['x'] ['m'] ['l'];
    } // DocumentStart
    
    /*
      Comment declaration scanning mode
    */
    lexmode CommentDeclaration
      : standalone
    {
      /*
        Comment close
      */
      COM := ['-'] ['-'];
      
      /*
        Comment data
      */
      $string := ['-']? [^'-'];
      STRING : value := $string+;
    } // CommentDeclaration
    
    /*
      Processing instruction name and |S| scanning mode
    */
    lexmode PIName
      : standalone
      : extends => 'Name'
      : extends => 'S'
    {
      /*
        Processing instruction close
      */
      PIC := ['?'] ['>'];
    } // PIName
    
    /*
      Processing instruction data scanning mode
    */
    lexmode PIData
      : standalone
    {
      /*
        Processing instruction close
      */
      PIC := ['?'] ['>'];
      
      /*
        Processing instruction target data
      */
      ?default-token DATA : value;
    } // PIData
    
    /*
      Content of element scanning mode
    */
    lexmode ElementContent
      : standalone
    {
      /*
        Start tag open
      */
      STAGO := ['<'];
      
      /* 
        End tag open
      */
      ETAGO := ['<'] ['/'];
      
      /*
        Hexadecimal character reference open
      */
      HCRO := ['&'] ['#'] ['x'];
      
      /*
        Numeric character reference open
      */
      CRO := ['&'] ['#'];
      
      /*
        General entity reference open
      */
      ERO := ['&'];
      
      /*
        Comment declaration open
      */
      CDO := ['<'] ['!'] ['-'] ['-'];
      
      /*
        CDATA section open
      */
      CDSO := ['<'] ['!'] ['[']
              ['C'] ['D'] ['A'] ['T'] ['A'] ['['];
      
      /*
        Processing instruction open
      */
      PIO := ['<'] ['?'];

      /*
        Markup section end
      */
      MSE := [']'] [']'] ['>'];

      /*
        Character data
      */
      /*
        Character data and/or |MSE|
      */
      ?default-token CharData : value;
    } // ElementContent
    
    /*
      CDATA section content scanning mode
    */
    lexmode CDATASectionContent
      : standalone
    {
      /*
        Markup section end
      */
      MSE := [']'] [']'] ['>'];
      
      /*
        Character data
      */
      ?default-token CData : value;
    } // CDATASectionContent
    
    lexmode EntityReference
      : standalone
      : extends => 'Name'
    {
      /*
        Reference close
      */
      REFC := [';'];
    } // EntityReference
    
    lexmode NumericCharacterReference
      : standalone
    {
      /*
        Decimal number
      */
      $digit := ['0' '1' '2' '3' '4' '5' '6' '7' '8' '9'];
      NUMBER : value := $digit+;
      
      /*
        Reference close
      */
      REFC := [';'];
    } // NumericCharacterReference
    
    lexmode HexadecimalCharacterReference
      : standalone
    {
      /*
        Hexadecimal number
      */
      $hexdigit := ['0' '1' '2' '3' '4' '5' '6' '7' '8' '9'
                    'A' 'B' 'C' 'D' 'E' 'F'
                    'a' 'b' 'c' 'd' 'e' 'f'];
      Hex : value := $hexdigit+;
      
      /*
        Reference close
      */
      REFC := [';'];
    } // HexadecimalCharacterReference
    
    lexmode XMLDeclaration
      : standalone
      : extends => 'Name'
      : extends => 'S'
    {
      
      /*
        Value indicator
      */
      VI := ['='];
      
      /*
        Literal open
      */
      LIT := ['"'];
      LITA := [U+0027];
      
      /*
        Processing instruction close
      */
      PIC := ['?'] ['>'];
    } // XMLDeclaration
    
    lexmode StartTag
      : standalone
      : extends => 'Name'
      : extends => 'S'
    {
      
      /*
        Value indicator
      */
      VI := ['='];
      
      /*
        Literal open
      */
      LIT := ['"'];
      LITA := [U+0027];
      
      /*
        Tag close
      */
      TAGC := ['>'];
      
      /*
        Empty element tag close
      */
      MTAGC := ['/'] ['>'];
    } // StartTag
    
    lexmode EndTag
      : standalone
      : extends => 'Name'
      : extends => 'S'
    {
      /*
        Tag close
      */
      TAGC := ['>'];
    } // EndTag
    
    lexmode AttributeValueLiteral_ {
      ERO := ['&'];
      CRO := ['&'] ['#'];
      HCRO := ['&'] ['#'] ['x'];
    } // AttributeValueLiteral_
    
    lexmode AttributeValueLiteral
      : standalone
      : extends => 'AttributeValueLiteral_'
    {
      LIT := ['"'];
      STRING : value := [^'"' '&' '<']+;
    } // AttributeValueLiteral
    
    lexmode AttributeValueLiteralA
      : standalone
      : extends => 'AttributeValueLiteral_'
    {
      LITA := [U+0027];
      STRING : value := [^U+0027 '&' '<']+;
    } // AttributeValueLiteralA

    lexmode EntityValue_ {
      PERO := ['%'];
      ERO := ['&'];
      CRO := ['&'] ['#'];
      HCRO := ['&'] ['#'] ['x'];
    } // EntityValue_
    
    lexmode EntityValue
      : standalone
      : extends => 'EntityValue_'
    {
      LIT := ['"'];
      STRING : value := [^'"' '&' '%']+;
    } // EntityValue
    
    lexmode EntityValueA
      : standalone
      : extends => 'EntityValue_'
    {
      LITA := [U+0027];
      STRING : value := [^U+0027 '&' '%']+;
    } // EntityValueA

    lexmode SystemLiteral
      : standalone
    {
      LIT := ['"'];
      ?default-token STRING : value;
    } // SystemLiteral

    lexmode SystemLiteralA
      : standalone
    {
      LITA := [U+0027];
      ?default-token STRING : value;
    } // SystemLiteralA

    lexmode DTD
      : standalone
      : extends => 'S'
    {
      /*
        Markup declaration open
      */
      MDO := ['<'] ['!'];

      /*
        Comment declaration open
      */
      CDO := ['<'] ['!'] ['-'] ['-'];

      /*
        Processing instruction open
      */
      PIO := ['<'] ['?'];

      /*
        Parameter entity reference open
      */
      PERO := ['%'];

      /*
        Declaration subset close
      */
      DSC := [']'];

      /*
        Contition section open
      */
      CSO := ['<'] ['!'] ['['];
    } // DTD
    
    /*
      Markup declaration scanning mode
      
      This mode is used to recognize |MDC| that terminates
      a comment declaration as well as the base |lexmode|
      for e.g. document type declaration scanning mode.
    */
    lexmode MarkupDeclaration
      : standalone
      : extends => 'Name'
      : extends => 'S'
    {
      /*
        Markup declaration close
      */
      MDC := ['>'];
      
      /*
        Literal open
      */
      LIT := ['"'];
      
      /*
        Alternative literal open
      */
      LITA := [U+0027];

      /*
        Parameter entity reference open
      */
      PERO := ['%'];
    
      /*
        Declaration subset open
      */
      DSO := ['['];
    } // MarkupDeclaration

    lexmode ElementDeclaration
      : standalone
      : extends => 'MarkupDeclaration'
    {
      /*
        Model group open
      */
      MGO := ['('];

      /*
        Model group close
      */
      MGC := [')'];

      /*
        Reserved name indicator
      */
      RNI := ['#'];

      /*
        Occurence indicators
      */
      OPT := ['?'];
      REP := ['*'];
      PLUS := ['+'];

      /*
        Connectors
      */
      OR := ['|'];
      SEQ := [','];
    } // ElementDeclaration

    lexmode AttlistDeclaration
      : standalone
      : extends => 'MarkupDeclaration'
    {
      /*
        Enumeration group open
      */
      EGO := ['('];

      /*
        Enumeration group close
      */
      EGC := [')'];

      /*
        Enumeration choice delimiter
      */
      OR := ['|'];

      /*
        Reserved name indicator
      */
      RNI := ['#'];
    } // AttlistDeclaration

    lexmode Enumeration
      : standalone
      : extends => 'Nmtoken'
      : extends => 'S'
    {
      /*
        Enumeration group close
      */
      EGC := [')'];

      /*
        Enumeration choice delimiter
      */
      OR := ['|'];
    } // Enumeration

    
    token-error default : default {
      lang:Perl {
        my $location;
        __CODE{xp|get-location-from-token::
          $token => {$token},
          $result => {$location},
        }__;
        my $continue = __DOMCore:ERROR{xp|wf-syntax-error::
          xp|error-token => {$token},
          DOMCore|location => {$location},
        }__;
        unless ($continue) {
          __EXCEPTION{DOMLS|PARSE_ERR::
          }__;
        }
        $self->{has_error} = true;
      }
    } // default
##ManakaiXMLParser

ResourceDef:
  @QName: xp|get-location-from-token
  @rdf:type: DISPerl|BlockCode
  @enDesc:
    Creates a <IF::DOMCore:DOMLocator> object from a token.
  @PerlDef:
    $result = {
      utf32_offset => pos ($self->{source}),
    };
  @For: ManakaiDOM|ManakaiDOM3

ElementTypeBinding:
  @Name: RuleDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@ForCheck: ManakaiDOM|ForClass
    @@rdf:type: Muf2003|RuleDefClass

ElementTypeBinding:
  @Name: RuleParam
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: Muf2003|RuleParameter

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

ElementTypeBinding:
  @Name: ErrDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: DOMCore|DOMErrorType
    @@For: ManakaiDOM|DOM3
    @@ecore:textFormatter: ManakaiXMLParserExceptionFormatter

ElementTypeBinding:
  @Name: WFErrDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: DOMCore|DOMErrorType
    @@For: ManakaiDOM|DOM3
    @@ecore:textFormatter: ManakaiXMLParserExceptionFormatter

WFErrDef:
  @QName: xp|wf-syntax-error
  @enDesc:
    The entity does not match to the production rule; it is not
    well-formed.
  @DOMCore:severity: DOMCore|SEVERITY_FATAL_ERROR
  @enMufDef:
    |%xp-error-token-type;|%xp-error-token-value
    (prefix => { (|}, suffix => {|)}); is not 
    allowed%xp-error-lines (prefix => { (|}, suffix => {|)});
  @ecore:hasParameter:
    @@@: xp|error-token
    @@enDesc:
      The token that is not allowed.

WFErrDef:
  @QName: xp|wf-pi-target-is-xml
  @enDesc:
    A processing instruction has its <CODE::PITarget> of
    <XML::xml> (in any case) which is not allowed.
  @DOMCore:severity: DOMCore|SEVERITY_ERROR
  @enMufDef:
    Processing instruction target name cannot be |%p
    (name => {<Q::xp|name>});|
  @ecore:hasParameter:
    @@@: xp|error-token
    @@enDesc:
      The token that contains the name.
  @ecore:hasParameter:
    @@@: xp|name
    @@enDesc:
      A string that is specified as target name of the
      processing instruction.
  @ecore:hasParameter: xp|parent

WFErrDef:
  @QName: xp|wf-no-end-tag
  @DOMCore:severity: DOMCore|SEVERITY_ERROR
  @enDesc:
    An end-tag is not found.
  @enMufDef:
    End-tag |</%p (name => {<Q::xp|expected-element-type>});>| is required
  @ecore:hasParameter: xp|error-token
  @ecore:hasParameter:
    @@@: xp|node
    @@enDesc:
      The element node that is not closed.
  @ecore:hasParameter:
    @@@: xp|expected-element-type
    @@enDesc:
      The element type name of the element that is not closed.

WFErrDef:
  @QName: xp|wf-unsupported-xml-version
  @DOMCore:severity: DOMCore|SEVERITY_ERROR
  @enDesc:
    The XML version specified in the version declaration is not supported.
  @enMufDef:
    XML version |%p (name => {<Q::infoset|version>});| is not supported
  @ecore:hasParameter: xp|bad-token
  @ecore:hasParameter:
    @@@: xp|parent
    @@enDesc:
      The document node.
  @ecore:hasParameter:
    @@@: infoset|version
    @@enDesc:
      The specified XML version.

WFErrDef:
  @QName: xp|wf-malformed-enc-name
  @DOMCore:severity: DOMCore|SEVERITY_ERROR
  @enDesc:
    An <XA::encoding> pseudo-attribute value does not match
    to the procduction rule <CODE::EncName>.
  @enMufDef:
    Encoding name |%p (name => {<Q::xp|name>});| is not allowed
  @ecore:hasParameter: xp|error-token
  @ecore:hasParameter:
    @@@: xp|parent
    @@enDesc: The document node.
  @ecore:hasParameter:
    @@@: xp|name
    @@enDesc:
      The <XA::encoding> value.

WFErrDef:
  @QName: xp|wf-malformed-xml-standalone
  @DOMCore:severity: DOMCore|SEVERITY_ERROR
  @enDesc:
    An <XA::standalone> pseudo-attribute value is neither <XML::yes>
    or <XML::no>.
  @enMufDef:
    |standalone| pseudo-attribute value |%p (name => {<Q::xp|name>});|
    is not allowed
  @ecore:hasParameter: xp|error-token
  @ecore:hasParameter:
    @@@: xp|parent
    @@enDesc: The document node.
  @ecore:hasParameter:
    @@@: xp|name
    @@enDesc:
      The <XA::standalone> value.

WFErrDef:
  @QName: xp|wf-legal-literal-character
  @DOMCore:severity: DOMCore|SEVERITY_ERROR
  @enDesc:
    Each character in XML entity must match to the production
    rule <CODE::Char - RestrictedChar>.
  @enMufDef:
    Character %character-code-point 
    (v => {<Q::xp|character-number>}); is not allowed
  @ecore:hasParameter:
    @@@: xp|character-number
    @@enDesc:
      The code position of the character being referred.

WFErrDef:
  @QName: xp|wf-element-type-match
  @DOMCore:severity: DOMCore|SEVERITY_FATAL_ERROR
  @enDesc:
    The <CODE::Name> in an element's end-tag must match the element type
    in the start-tag.
  @enMufDef:
    End-tag |</%p (name => {<Q::xp|actual-element-type>});>| does
    not match to start-tag |<%p (name => {<Q::xp|expected-element-type>});>|
  @ecore:hasParameter: xp|error-token
  @ecore:hasParameter:
    @@@: xp|node
    @@enDesc:
      The current opening element node.
  @ecore:hasParameter:
    @@@: xp|expected-element-type
    @@enDesc:
      The element type name of the current element.
  @ecore:hasParameter:
    @@@: xp|actual-element-type
    @@enDesc:
      The <CODE::Name> occurs in the end-tag.

WFErrDef:
  @QName: xp|wf-unique-att-spec
  @DOMCore:severity: DOMCore|SEVERITY_ERROR
  @enDesc:
    An attribute name <kwd:MUST-NOT> appear more than once in
    the same start-tag or empty-element tag.
  @enMufDef:
    Attribute |%p (name => {<Q::xp|name>});| is specified more
    than once in the same tag
  @ecore:hasParameter: xp|error-token
  @ecore:hasParameter:
    @@@: xp|name
    @@enDesc:
      The name of the attribute.

WFErrDef:
  @QName: xp|wf-legal-character
  @DOMCore:severity: DOMCore|SEVERITY_ERROR
  @enDesc:
    Characters referred to using character references <kwd:MUST>
    match the production for <CODE::Char>.
  @enMufDef:
    Reference to character %character-code-point 
    (v => {<Q::xp|character-number>}); is not allowed
  @ecore:hasParameter: xp|error-token
  @ecore:hasParameter:
    @@@: xp|character-number
    @@enDesc:
      The code position of the character being referred.
  @ecore:hasParameter:
    @@@: xp|parent
    @@enDesc:
      The parent node in which the character reference has
      occurred, if available.

XWParam:
  @QName: xp|error-token
  @enDesc:
    The token where the parser found an error.

XWParam:
  @QName: xp|name
  @enDesc:
    A name.

XWParam:
  @QName: xp|parent
  @enDesc:
    The parent node in which the error occurs.

XWParam:
  @QName: xp|node
  @enDesc:
    The current node.

XWParam:
  @QName: xp|actual-element-type
  @enDesc:
    The actual element type name occured in the source.

XWParam:
  @QName: xp|expected-element-type
  @enDesc:
    The element type name expected.

XWParam:
  @QName: xp|character-number
  @enDesc:
    The character code position.

ElementTypeBinding:
  @Name: XWParam
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@For: =ManakaiDOM|all
    @@rdf:type: ecore|Parameter

ElementTypeBinding:
  @Name:enMufDef
  @ElementType:
    ecore:defaultMessage
  @ShadowContent:
    @@lang:en
    @@ContentType:
      lang:muf

ResourceDef:
  @QName: DOMImpl
  @AliasFor: DOMCore|DOMImplementation
  @For: ManakaiDOM|DOM

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

ElementTypeBinding:
  @Name: Get
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: DISLang|AttributeGet

ElementTypeBinding:
  @Name: Set
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: DISLang|AttributeSet

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

ElementTypeBinding:
  @Name: Method
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: DISLang|Method
    @@For: !=ManakaiDOM|ManakaiDOM

ElementTypeBinding:
  @Name: Return
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: DISLang|MethodReturn

ElementTypeBinding:
  @Name: Param
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: DISLang|MethodParameter

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

ElementTypeBinding:
  @Name: PropDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: rdf|Property

ClsDef:
  @ClsQName: ManakaiXMLParserExceptionFormatter

  @ClsISA: ecore|MUErrorFormatter||ManakaiDOM|Perl

  @RuleDef:
    @@Name: xp-error-token-type
    @@enDesc:
      The type of the token the parser is encountered.

    @@Method:
      @@@Name: after
      @@@Param:
        @@@@Name: name
        @@@@Type: DOMString
        @@@@enDesc: The name of the method.
      @@@Param:
        @@@@Name: p
        @@@@Type: DISPerl|HASH
        @@@@enDesc: The set of the parameters to the method.
      @@@Param:
        @@@@Name: o
        @@@@Type: DISPerl|HASH
        @@@@enDesc: The option value.
      @@@Return:
        @@@@PerlDef:
          $p->{-result} = $o->{<H::xp|error-token>}->{type}
            if defined $o->{<H::xp|error-token>}->{type};

  @RuleDef:
    @@Name: xp-error-token-value
    @@enDesc:
      The value of the token the parser is encountered, if any.

    @@Method:
      @@@Name: after
      @@@Param:
        @@@@Name: name
        @@@@Type: DOMString
        @@@@enDesc: The name of the method.
      @@@Param:
        @@@@Name: p
        @@@@Type: DISPerl|HASH
        @@@@enDesc: The set of the parameters to the method.
      @@@Param:
        @@@@Name: o
        @@@@Type: DISPerl|HASH
        @@@@enDesc: The option value.
      @@@Return:
        @@@@PerlDef:
          $p->{-result} = $o->{<H::xp|error-token>}->{value}
            if defined $o->{<H::xp|error-token>}->{value};

  @RuleDef:
    @@Name: xp-error-lines
    @@enDesc:
      A copy of fragment of the source text that contains the line
      where the error occurred, if available.
    
    @@Method:
      @@@Name: after
      @@@Param:
        @@@@Name: name
        @@@@Type: DOMString
        @@@@enDesc: The name of the method.
      @@@Param:
        @@@@Name: p
        @@@@Type: DISPerl|HASH
        @@@@enDesc: The set of the parameters to the method.
      @@@Param:
        @@@@Name: o
        @@@@Type: DISPerl|HASH
        @@@@enDesc: The option value.
      @@@Return:
        @@@@PerlDef:
          my $pos = $o-><AG::DOMCore|DOMError.location>
                      -><AG::DOMCore|DOMLocator.utf32Offset>;
          if ($pos > -1) {
            my $src = \($o->{<H::ecore|object>}->{source});
            my $start = $pos;
            $start = rindex ($$src, "\x0A", $start - 1) for 0..2;
            $start++;
            my $end = $pos;
            $end = index ($$src, "\x0A", $end + 1) for 0..2;
            $end = length $$src if $end < 0;
            $p->{-result} = substr $$src, $start, $end - $start;
          }

  @RuleDef:
    @@Name: character-code-point
    @@enDesc:
      The character code position, in <CODE::U+<VAR::HHHH>> notation.
    
    @@Method:
      @@@Name: after
      @@@Param:
        @@@@Name: name
        @@@@Type: DOMString
        @@@@enDesc: The name of the method.
      @@@Param:
        @@@@Name: p
        @@@@Type: DISPerl|HASH
        @@@@enDesc: The set of the parameters to the method.
      @@@Param:
        @@@@Name: o
        @@@@Type: DISPerl|HASH
        @@@@enDesc: The option value.
      @@@RuleParam:
        @@@@Name: v
        @@@@Type: DISPerl|Number
        @@@@enDesc:
          The name of the error parameter that contains the character code.
      @@@Return:
        @@@@PerlDef:
          $p->{-result} = sprintf 'U+%04X', $o->{$p->{v}};
##XMLParserExceptionFormatter