/[suikacvs]/markup/html/whatpm/Whatpm/ChangeLog

Diff of /markup/html/whatpm/Whatpm/ChangeLog

Parent Directory | Revision Log | View Patch Patch

-revision 1.12 by wakaba,
Sat May 19 03:49:58 2007 UTC
+revision 1.368 by wakaba,
Fri Dec 12 05:05:20 2008 UTC
 Line 1
+-12-12  Wakaba  <wakaba@suika.fam.cx>
+         * IMTChecker.pm: Added more definitions for subtypes.
+-12-11  Wakaba  <wakaba@suika.fam.cx>
+         * URIChecker.pm: Some of |pos_end| values were wrong.
+-12-06  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_element): Added support for "no
+         referenced datalist" error.
+-12-06  Wakaba  <wakaba@suika.fam.cx>
+         * URIChecker.pm: Bug fix: It did not work unless
+         Message::DOM::DOMImplementation has been |require|d.
+-12-06  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (document_uri): New attribute.
+         * ContentChecker.pm: Don't use methods not implemented by NanoDOM.
+-11-07  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (text_content): Don't create a Text node if the new
+         value is empty.
+-11-06  Wakaba  <wakaba@suika.fam.cx>
+         * SWML/: New directory.
+-10-20  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (specified, all_declarations_processed,
+         manakai_attribute_type): New attributes.
+-10-19  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (Entity->new): Initialize ->child_nodes as an empty
+         array.
+-10-19  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (notation_name): New attribute.
+-10-18  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (public_id, system_id): New attributes.a
+-10-18  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (text_content): Moved to Node from Element.  Setter
+         implemented.
+         (allowed_tokens, default_type, declared_type): Implemented.
+-10-17  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (node_name): New attribute.
+         (ELEMENT_TYPE_DEFINITION_NODE, ATTRIBUTE_DEFINITION_NODE): New
+         constants.
+         (create_element_type_definition_node, create_attribute_definition,
+         create_notation, create_general_entity,
+         get_element_type_definition_node,
+         set_element_type_definition_node, get_general_entity_node,
+         set_general_entity_node, get_notation_node, set_notation_node,
+         get_attribute_definition_node, set_attribute_definition_node): New
+         methods.
+         (element_types, entities, notations, attribute_definitions): New
+         attributes.
+         (DocumentType): Support for child nodes, entities, notations, and
+         element types.
+         (Entity, Notation, ElementTypeDefinition, AttributeDefinition):
+         New classes.
+         * Dumper.pm: Support for general entities, notations, element type
+         definitions, and attribute definitions.
+-10-15  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (create_processing_instruction): New method.
+         (xml_version, xml_encoding, xml_standalone): New attributes.
+         (ProcessingInstruction): New class.
+-10-14  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Handling of end tags in the foreign content
+         insertion mode was partially wrong, because of wrong bit
+         operations.
+-10-14  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (dom_config): New attribute (do nothing), for
+         Whatpm::XML::Parser support.
+-10-14  Wakaba  <wakaba@suika.fam.cx>
+         * Makefile: New rule to make HTML/Tokenizer.pm is added.
+         * HTML.pm.src: Tokenizer part moved to another file.
+-10-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Merge |DT_EL| and |DD_EL| as |DTDD_EL|.
+-10-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Element category constants redefined.
+-10-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Steps for CDATA/RCDATA elements in tree
+         construction stage synced with the spec (HTML5 revisions 2139 and
+).
+-10-07  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: New error level "html5_fact" added, which
+         should be tentatively used until all of requirements are properly
+         specced as RFC 2119 "MUST" in HTML5.
+-10-05  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pod: Note on internal flags is added.
+-10-05  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: An AAA bug fixed.
+-10-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: If another node is inserted by the parser, don't
+         reuse existing Text node to append a character (HTML5 revision
+).
+-10-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for <option> and <optgroup> in body (HTML5
+         revisions 1731 and 2128).
+-10-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Make <foreignObject> scoping (HTML5 revision 1837).
+         Support for end tags of camelCase SVG elements were broken.  A
+         wrong error type text fixed.
+-10-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Drop redundant code (HTML5 revision 1731).
+-10-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for new definition of |param| and |source|
+         start tag parsing (HTML5 revision 1731).
+-10-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: <p> steps reimplemented (HTML5 revision 1731).
+-10-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: <li>, <dt>, and <dd> steps reimplemented (HTML5
+         revisions 1731 and 1831).
+-10-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for new flow (but not phrasing) elements (HTML5
+         revisions 1731 and 1778).  Support for the </sarcasm> end tag (HTML5
+         revision 1731).
+-10-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for |command| and |eventsource| elements (HTML5
+         revision 1731).  End tags of |option| and |optgroup| elements are
+         now optional (HTML5 revision 1731).
+-10-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: New "special" elements added to the list (HTML5
+         revision 1778).  "strile" -> "strike".
+-10-02  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm (get_sniffed_type): Support for the "better"
+         content sniffing (HTML5 revision 1927).  In a case the official
+         type was not returned when the method is invoked in the list
+         context.
+-09-22  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Character references for non-space C0 characters,
+         including U+000B VT, DEL character, noncharacter code points, are
+         now converted to the U+FFFD character (cf. HTML5 revision 2138).
+-09-21  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: |form=""| check support added.
+-09-21  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: |contextmenu| validness is now checked using
+         |id| and |id_type| properties, and |menu| property is removed.
+-09-21  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Prepare for |form| |name| attribute's
+         duplication checking.
+-09-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_byte_stream): Support (or non-support) for
+         unsupported charset="" parameter value (HTML5 revision 2131).
+-09-20  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Reminding places where U+000B is allowed as a space
+         character is fixed (cf. HTML5 revision 1738).
+         * ContentChecker.pm, HTMLTable.pm: U+000B is no longer part of
+         space characters (HTML5 revision 1738).
+-09-20  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: The "anything else" case for the "after after body"
+         insertion mode was not updated to swtich to the "in body"
+         insertion mode.  U+000B is no longer a space character for the
+         purpose of tree construction phase (HTML5 revision 1738).
+-09-20  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: U+000B is no longer a space character (HTML5
+         revision 1738).
+-09-20  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm: 0x0B is no longer a space character (HTML5
+         revision 1738).
+         * HTML.pm.src: U+000B is no longer a space character for the
+         algorithm for extracting an encoding from a Content-Type (HTML5
+         revision 1738).
+-09-20  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm ($IsInHTMLInteractiveContent): New.
+-09-18  Wakaba  <wakaba@suika.fam.cx>
+         * LangTag.pm: Add checks for remaining requirements from RFC 4646.
+         * mklangreg.pl: Sort 'Prefix' values by their length, to ease
+         matching.
+-09-18  Wakaba  <wakaba@suika.fam.cx>
+         * LangTag.pm: Warn for private use language subtags.  Error level
+         typos fixed.  Support for Suppress-Script field.
+         * mklangreg.pl: Support for dumping of nested structure.
+-09-18  Wakaba  <wakaba@suika.fam.cx>
+         * LangTag.pm (check_rfc4646_langtag): Check if a tag is in the
+         recommended case as per RFC 4646.
+-09-18  Wakaba  <wakaba@suika.fam.cx>
+         * LangTag.pm (check_rfc4646_langtag): New method.
+-09-18  Wakaba  <wakaba@suika.fam.cx>
+         * mklangreg.pl: New script.
+         * Makefile: Updated for creation of the module for language subtag
+         registry.
+-09-16  Wakaba  <wakaba@suika.fam.cx>
+         * Makefile: WebIDL.html added.
+         * WebIDL.pod: New documentation.
+-09-16  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm: Checker's error types are redefined.
+-09-16  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm: Parser's error types are redefined.  Some forward
+         compatible parsing bugs are fixed.  Some unreachable codes are
+         commented out.
+-09-16  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm: Support for the reminding extended attributes are
+         added.  It does not satisfy the definition that a forward
+         interface declaration has an extended attribute.  It seems that
+         unless explicitly allowed multiple extended attributes with the
+         same name is not allowed, though it is not explicitly mentioned in
+         the spec.
+-09-16  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm: Unescapes extended attribute names and extended
+         attribute identifiers.  Preserve whether an extended attribute has
+         an argument list of not.  Support for extended attributes:
+         Constructor, ExceptionConsts, IndexGetter, IndexSetter,
+         NameGetter, NameSetter, and Null.
+         (has_argument_list): New attribute.
+         (idl_text): Stringifies argument lists, if any, even if it is
+         empty.
+-09-15  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: New state |PCDATA_STATE|.  Use an empty string for
+         |{s_kwd}| in DATA_STATE as default.
+-09-15  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src, mkhtmlparser.pl: Replace |{prev_char}|
+         by |{s_kwd}| in DATA_STATE.
+-09-15  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Shorten keys.
+-09-15  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Remove checking for control character, surrogate
+         pair, or noncharacter code points and non-Unicode code
+         points (they should be handled by Whatpm::Charset::UnicodeChecker).
+         (parse_char_stream): Support for the |$get_wrapper| argument and
+         character stream error handlers.
+-09-15  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Don't call |loda_ns_module|
+         for null-namespace elements/attributes.
+         * HTML.pm.src: Fact out $disallowed_control_chars
+         as a hash.
+-09-14  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Regexp typo fixed.  |{prev_char}|
+         and |{next_char}| initializations are moved to initialization
+         method.  |{read_until}| now supports buffering.  Sync |set_inner_html|
+         with |parse_char_stream|.
+-09-14  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_char_stream): Make |set_next_char|
+         invoke |manakai_read_until|, not only |read|, where
+         possible, to decrease the number of |read| method calls.
+         * mkhtmlparser.pl: Related changes to the aforementioned
+         modification.
+-09-14  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Use |read| instead of |getc|.  |set_inner_html|
+         would report character error from now.
+-09-14  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: White-space-leaded non-white-space character
+         tokens in "before head insertion mode" was not
+         correctly handled.
+         (set_inner_html): Reimplemented using CharString decodehandle
+         class.  Support for $get_wrapper argument.  Support
+         for |{read_until}| feature.
+-09-14  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Make a "bare ero" error for unknown
+         entities point the "&" character.
+-09-14  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: It turns out that U+FFFD don't have to
+         be added to the list of excluded characters.
+-09-14  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src ($char_onerror): Have character decoder's |line|
+         and |column| a higher priority than the one set by the
+         tokenizer's input handler.
+         ($self->{read_until}): Exclude U+FFFD (but this might
+         not be necessary, since now we do line/column fixup in
+         the character decode handle).
+-09-14  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Use |{read_until}| where possible.
+-09-14  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Change |{getc_until}| to |{read_until}|
+         and |manakai_getc_until| to |manakai_read_until| to
+         reduce the number of string copies.
+-09-14  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_char_string): Use newly created
+         |Whatpm::Charset::DecodeHandle::CharString| instead of Perl's
+         standard feature to |open| a string as a filehandle,
+         since Perl's string filehandle seems not supporting |ungetc|
+         method correctly.
+         (parse_char_stream): Define |{getc_until}| method.
+         (DATA_STATE): Experimental support for |getc_until| feature.
+-09-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Check points added to newly added branches.
+-09-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Remove |{char}|, which is no longer used.
+         Remove |{entity_in_attr}| and |{last_attribute_value_state}|
+         and replaced by |{prev_state}|.
+         * mkhtmlparser.pl: Remove |{char}| feature.
+         Remove |!!!back-next-input-character;| macro.
+-09-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Finally we get rid of all the inner loops.  Remove
+         entity related tokenizer states in favor of new states
+         implementing the consume character reference algorithm.
+-09-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: "Consume a character reference" algorithm is
+         now implemented as a tokenizer's state, rather than
+         a method, with minimum changes (more changes will
+         be made, in due course).  "Bogus comment state"'s inner
+         loop gets removed.
+-09-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Make |PUBLIC| and |SYSTEM| keyword tokenizing
+         into their own tokenizer states.
+-09-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |CDATA_SECTION_STATE| (formally |CDATA_BLOCK_STATE|
+         is split into three states.
+-09-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |CLOSE_TAG_OPEN_STATE| is broken into
+         itself and new |CDATA_PCDATA_CLOSE_TAG_STATE| so that
+         no longer does the tokenizer have to push back next input
+         characters in those states.
+-09-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |MARKUP_DECLARATION_OPEN_STATE| broken
+         into four states so that no longer does the tokenizer have to push
+         back next input characters in that state.
+-09-11  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Methods now accept additional parameter, $get_wrapper,
+         which can be used to insert some wrapper between the character
+         stream handle and the tokenizer.  (It is currently not supported
+         for |set_inner_html| for |Element|s).
+-09-10  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Ignore punctuations in charset names.
+-09-10  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Support for charset-layer error levels.
+         * HTML.pm.src: Don't specify |text| argument for the
+         |chardecode:fallback| error, since it is not the encoding
+         being used alternatively.
+-09-06  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for |XSLT-compat| (HTML5 revision 2141).
+-08-31  Wakaba  <wakaba@suika.fam.cx>
+         * CacheManifest.pm: Support for extensibility (HTML5 revision 2051).
+-08-31  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Bug fix and sync with the spec with regard
+         to after after frameset insertion mode processing (HTML5
+         revision 1909).  Note that the implementation was wrong
+         per the old spec before the r1909 changes.
+-08-30  Wakaba  <wakaba@suika.fam.cx>
+         * HTMLTable.pm: scope=auto algorithm fix synced with the
+         spec (HTML5 revision 2093).
+         ($process_row): Algorithm step numbers synced with the
+         spec (HTML5 revision 2092).
+-08-30  Wakaba  <wakaba@suika.fam.cx>
+         * HTMLTable.pm: Zs is not what we want; we want White_Space! (HTML5
+         revision 2094).
+-08-30  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm: Support for image/svg+xml (HTML5 revision 2096).
+-08-30  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: '"' and "'" at the end of attribute
+         name (after another attribute) now raise parse error (HTML5
+         revision 2123).  Empty unquoted attribute values are no
+         longer allowed (HTML5 revision 2122).
+-08-30  Wakaba  <wakaba@suika.fam.cx>
+         * mkhtmlparser.pl: Support for MathML |definitionURL| attribute (HTML5
+         revision 2130).
+-08-30  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: |xml:lang| attribute value must be same
+         as |lang| attribute value for HTML elements (HTML5 revision 2062
+         and so on).
+-08-30  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Error level definition for |xml_id_error|
+         was missing.
+         * URIChecker.pm: The end of the URL should be marked as the
+         error location for an empty path error.  The position
+         between the userinfo and the port components should be
+         marked as the error location for an empty host error.
+-08-30  Wakaba  <wakaba@suika.fam.cx>
+         * URIChecker.pm: Set parameters representing where in the
+         value the error occurs for errors.  Report unknown
+         address format error in warning level, since address
+         formats are rarely added.  Path segments starting with "/.."
+         were misinterpreted as a dot-segment.
+-08-30  Wakaba  <wakaba@suika.fam.cx>
+         * URIChecker.pm (check_iri_reference): Requires
+         |Message::DOM::DOMImplementation|.
+-08-29  Wakaba  <wakaba@suika.fam.cx>
+         * IMTChecker.pm: Updated for the new error reporting architecture.
+         * ContentChecker.pm: Error levels for IMTs are added.
+-08-17  Wakaba  <wakaba@suika.fam.cx>
+         * H2H.pm (_shift_token): Support for unquoted HTML attribute
+         values.
+-08-16  Wakaba  <wakaba@suika.fam.cx>
+         * CacheManifest.pm: Support for new style of error
+         reports.
+         * HTML.pm.src: Set line=1, column=1 to the document node.
+-08-16  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm, RDFXML.pm: Pass {level} object to language tag
+         and URL checkers.  Support for more error levels for bogus
+         langauge tag and URL "standards".
+         * LangTag.pm, URIChecker.pm: Support for new style error
+         level reporting.
+-08-15  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Support for RDF/XML error levels.
+         * HTMLTable.pm, RDFXML.pm: Support for new style of error level
+         specifying.  Error types are revised.
+-08-15  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: All error reporting method calls are
+         renewed.
+-08-15  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: All error type names and "text" parameters
+         are revised.  Use new style for "level" specification.
+         * mkhtmlparser.pl: Use new style for "level" specification.
+-08-03  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm (parse_char_string): Simplified error
+         reporting process for broken ignored valuetype definition.
+         (Valuetype idl_text): Support for special "DOMString" name.
+-08-03  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm ($get_scoped_name): Append "::::" if the last
+         terminal of the ScopedName is "DOMString", such that whether
+         the last part of the scoped name is "DOMString" or "_DOMString"
+         later.  It is necessary to determine whether a |typedef|
+         definition should be ignored or not.
+         (parse_char_string): Unescape the identifier of
+         exception members.
+         ($resolve): Return undef for builtin types and sequence<T>
+         types (we might not have to do this, however...).
+         (check): Support checking for Exceptions, Valuetypes,
+         and Typedefs.
+         ($serialize_type): Support for "DOMString::::" syntax.
+         (Typedef idl_text): Output Type as "DOMString" if it
+         is really "DOMString" (i.e. its internal representation
+         is "::DOMString::").
+-08-03  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm ($resolve): New code, based on resolve code
+         for constant types in the |check| method.
+         (check): Support for checking of attributes, operations, and
+         arguments.
+         (Attribute/Operation idl_text): Exception names in getraises,
+         setraises, and raises clauses is serizlied by |$serialize_type|
+         code.
+-08-02  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm ($integer): Order of selections are changed to match
+         hexadecimal numbers (the original pattern, taken from the spec,
+         was not work for hexadecimal numbers, because the "0" prefix
+         matches to the [0-7]* part (as an empty string) and therefore
+         it does not match with remaining "x..." part of a "0x..." integer
+         literal.
+         ($get_type): It now returns a string, not an array reference,
+         for regular types and |sequence| types (i.e. it in any case
+         returns a string).
+         ($get_next_token): The second item in the array that represents
+         a integer or float token is now a Perl number value, not the
+         original string representation of the number.
+         (check): Support for const value consistency checking.
+         No extended attribute is defined for constants.
+         (Node subclasses): Use simple strings rather than array references
+         for default data type values.
+         ($serialize_type): Type values are now simple strings.
+         (value): If the new attribute value is a false value, then
+         a FALSE value is set to the attribute.
+-08-02  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm ($get_scoped_name): Now scoped names are stored
+         in its stringified format ("scoped name" as defined in the
+         spec).  Note that future version of this module should not use
+         array references for type values and the |type_text| attribute
+         should be made obsolete.
+         (parse_char_string): Unescape attribute names.
+         (check): Support for checking of whether inherited interfaces
+         are actually defined or not.  Support for checking of whether
+         interface member identifiers are duplicated or not.
+         ($serialize_type): Scoped names are returned as is.  A future
+         version of this code should escape identifiers other than "DOMString",
+         otherwise the idl_text would be non-conforming.
+-08-02  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm (parse_char_string): Set line/column numbers
+         to generated nodes.  Unescape identifiers.  Extended attributes
+         for Definition's were ignored.
+         (append_child): Set |parent_node| attribute.
+         (parent_node): New attribute.
+         (check): Support interface/exception members.  Support
+         extended attributes.  Support definition identifier uniqueness
+         constraint.
+         (qualified_name): New attribute.
+         (Interface/Exception idl_text): Extended attributes were
+         not prepended to the returned text.
+-08-02  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm (parse_char_string): Set line/column numbers
+         to interface object experimentally.  s/shift/pop/g, shift
+         would make things wrong.  Support for interface forward
+         declarations was missing.  Broken interface declarations
+         with no block were not ignored entirely.
+         (Whatpm::WebIDL::Node): New abstract class.  This class
+         makes things easier.
+         (child_nodes): New attribute.  Unlike DOM's attribute with
+         same name, this attribute returns a dead list of nodes for
+         simplicity.
+         (get_user_data, set_user_data): New methods.
+         (Module idl_text): A SPACE character should be inserted
+         before the |{| character.
+         (Interface idl_text): Support for interface forward declarations.
+         (is_forward_declaration): New attribute.
+-07-19  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm (type_text): Better serializer.
+-07-19  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm: Revise forward-compatible parsing so that
+         it now can handle broken extended attributes and as such.
+-07-19  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm: Real support for extended attributes.
+         Support for extended attributes with arguments.
+-07-19  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm: Support for |exception| syntax.
+         (Interface->idl_text): Tentative support for inheritances.
+-07-19  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm: Hierarchical scoped name support was broken.
+         Support for raises, setraises, and getraises syntaxes.
+-07-18  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm: Support for |idl_text| attribute, version 1 (no
+         proper support for types, extended attributes, and exceptions yet).
+         WebIDL parser, version 1 (no support for exceptions yet,
+         no proper support for extended attributes yet).
+-07-09  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm (parse_char_string): Support for basic attribute syntax.
+-06-29  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm: Support for valuetype and const.
+-06-29  Wakaba  <wakaba@suika.fam.cx>
+         * WebIDL.pm: New module.
+-06-15  Wakaba  <wakaba@suika.fam.cx>
+         * Makefile (Entities.html): URI changed.
+-06-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for ruby parsing (HTML5 revision 1704).
+-06-01  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (_get_next_token): A parse error was missing.
+-06-01  Wakaba  <wakaba@suika.fam.cx>
+         * mklinktypelist.pl: rel=contact is no longer part of the HTML5
+         spec (commented out). (HTML5 revision 1711).
+-05-25  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm: Drop support for UTF-32 (HTML5 revision 1701).
+         * HTML.pm.src: UTF-16BE and UTF-16LE should be considered
+         as UTF-16 (HTML5 revision 1701).
+-05-25  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for <noframes> in <head> (HTML5 revision
+).
+-05-25  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: The secondary insertion mode used when switching
+         to foreign content is the "in body" insertion mode (HTML5 revision
+).
+-05-25  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Don't raise parse error for <isindex/> (HTML5
+         revision 1697).
+-05-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for end-of-file token in foreign content
+         insertion mode (HTML5 revision 1693).  Update SVG camelCase
+         attribute list (HTML5 revision 1700).  <textarea> closes
+         </select> (HTML5 revision 1699).  More start tags close in
+         foreign content insertion mode (HTML5 revision 1698).
+-05-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: ";" is not part of charset name (HTML5 revision 1665).
+-05-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: More robust charset parameter detection (HTML5
+         revision 1674).
+-05-24  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm: Support for image/vnd.microsoft.icon (HTML5
+         revision 1676).
+-05-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Ignore language part of public identifiers for
+         quriks mode detection (HTML5 revision 1679).
+-05-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Reduce the number of errors in truncated doctypes (HTML5
+         revision 1685).
+-05-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for EOF in new states for tags (HTML5
+         revision 1684).
+-05-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (_reset_insertion_mode): Make <td>.innerHTML
+         work (HTML5 revision 1690).
+-05-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (_tree_construction_main): Change handling of
+         end tags in head insertion modes (HTML5 revision 1686).
+         (parse_char_string): Bug fix for non-utf8 character string handlings.
+         (parse_char_stream): |ungetc| does not work well for this context.
+-05-18  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_byte_string): Redefined to invoke
+         |parse_byte_stream|.
+         (parse_byte_stream): New method.
+-05-18  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_byte_string): Fix the column number reported
+         by encoding layer error reporter.
+-05-17  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_byte_string): Use streaming decoder
+         rather than converting the whole byte string and then parsing.
+         Propagate errors in character encoding layer.
+         (get_next_token): Precise error reporting for |bare stago| error.
+-05-17  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_char_stream): New method.
+         (parse_char_string): This method is now defined as an invocation
+         of the |parse_char_stream| method.
+-05-17  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_byte_string): Report various status
+         of the sniffing as info-level errors.  Support for new
+         decoding framework in parser resestting.
+         (new): Various default error levels were not set.
+-05-17  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_byte_string): HTML5 encoding siniffing
+         algorithm, except for the actual sniffing, is implemented
+         with new framework with Message::Charset::Info.
+-05-16  Wakaba  <wakaba@suika.fam.cx>
+         * CacheManifest.pm (_parse): Drop fragment identifiers from
+         URIs in fallback section (HTML5 revision 1596).
+-05-10  Wakaba  <wakaba@suika.fam.cx>
+         * Makefile (Entities.html): URI has changed.
+-05-10  Wakaba  <wakaba@suika.fam.cx>
+         * CacheManifest.pm: Don't replace U+0000 NULL (HTML5 revision
+).
+-05-06  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Noted that those returned in |table| are
+         no longer table elements, but table objects returned
+         by Whatpm::HTMLTable.
+         * HTMLTable.pm (form_table): Return table element node
+         as |$table->{element}|.
+         (assign_header): Support for the |headers=""| attribute.
+-05-06  Wakaba  <wakaba@suika.fam.cx>
+         * HTMLTable.pm (assign_header): New function; first version
+         with no support for headers="".
+         (form_table): Include table width and height to the returned
+         table object for covenience.  Indexing in column assignement was wrong.
+         Set whether a data cell is empty or not for convenience.
+-05-05  Wakaba  <wakaba@suika.fam.cx>
+         * HTMLTable.pm: Robuster caption support (HTML5 revision 1393).
+-05-05  Wakaba  <wakaba@suika.fam.cx>
+         * HTMLTable.pm: How table model errors are detected is
+         changed (HTML5 revision 1387).
+-05-05  Wakaba  <wakaba@suika.fam.cx>
+         * HTMLTable.pm: The algorithm now moves |tfoot| elements
+         to the end of the table (HTML5 revision 1380).
+-05-05  Wakaba  <wakaba@suika.fam.cx>
+         * HTMLTable.pm: The algorithm is now 0-based indexing, instead
+         of 1-based (HTML5 revision 1376).
+-05-05  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm: "Content-Type: text/plain; charset=UTF-8"
+         and "Content-Encoding" no longer prevent sniffing (HTML5
+         revision 1288).
+-05-05  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm: Skip BOMs n feed or HTML algorithm (HTML5 revision
+).
+-05-03  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Support for global attributes.
+         Status of XML specs are added.
+-05-03  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_element): Support for |template=""|
+         and |ref=""| attribute (referent element type checking).
+-04-29  Wakaba  <wakaba@suika.fam.cx>
+         * CacheManifest.pm (_parse): New same origin definition (HTML5 revision
+) is implemented (except for IDNA part and URI-scheme-specific
+         knowledge).  Line number counting was wrong for LF-only
+         documents.
+-04-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Raise an parse error for any disallowed
+         character (HTML5 revision 1263).
+-04-13  Wakaba  <wakaba@suika.fam.cx>
+         * mkentitylist.pl: Support for new HTML5 entity table format (the
+         definition for |AElig;| was missing).
+-04-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src, mkhtmlparser.pl: Support for element/attribute
+         name/namespace fixup (HTML5 revisions 1413, 1415, 1416, and 1417).
+-04-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: List of element names that close foreign content
+         insertion mode is added (HTML5 revisions 1412 and 1418).
+-04-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for |mglyph| and |malignmark|
+         elements (HTML5 revision 1410).
+-04-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for new long MathML entities (HTML5
+         revision 1406).
+-04-13  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: CDATA section support for MathML and SVG
+         elements (HTML5 revision 1404 and 1420).
+-04-12  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src, mkhtmlparser.pl: Support for MathML and SVG
+         elements (HTML5 revision 1404).  Unused !!!macro definitions
+         are removed.
+-04-12  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src, mkhtmlparser.pl: The way permitted slash errors
+         are raised is changed (HTML5 revision 1404).
+-04-06  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Category sets that are no longer used are removed.
+-04-06  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: The ->[1] property of stack entries are now
+         replaced by constants representing element category.
+-04-06  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Don't use local name stored in stack (i.e. ->[1])
+         for error reporting.  (This is a preparation for using constant
+         value for ->[1].)
+-03-22  Wakaba  <wakaba@suika.fam.cx>
+         * RDFXML.pm: Typo fixed.
+-03-22  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: |fact_level| is now treated
+         as same as |must_level|, i.e. level = |m|.
+         (check_element): Make list of URIs in the DOM.
+-03-21  Wakaba  <wakaba@suika.fam.cx>
+         * RDFXML.pm: Language accessor implemented.
+         Local (null-namespace) attribute support.
+-03-21  Wakaba  <wakaba@suika.fam.cx>
+         * RDFXML.pm: Factored out ID checking code.
+-03-21  Wakaba  <wakaba@suika.fam.cx>
+         * RDFXML.pm: TODO items noted.  Validation of ID
+         and URI attributes is implemented.  Warn if unknown
+         value is used in rdf:parseType="" attribute.
+         * URIChecker.pm (check_rdf_uri_reference): New function.
+-03-21  Wakaba  <wakaba@suika.fam.cx>
+         * RDFXML.pm: bnodeid implemented.  Relative references
+         are now resolved.
+-03-21  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: RDF reification implemented.
+         * RDFXML.pm: undef vs false bug fixed.
+         Reification implemented.
+-03-21  Wakaba  <wakaba@suika.fam.cx>
+         * RDFXML.pm: s/id/ID/ for attribute name.
+         The |node| arguments are added for |ontriple| calls.
+         Too many "attribute not allowed" errors were raised.
+         * ContentChecker.pm: Initial experimental support for rdf:RDF
+         element.
+-03-21  Wakaba  <wakaba@suika.fam.cx>
+         * RDFXML.pm: New module.
+-03-20  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (set_inner_html): Line/column number
+         code was old one yet.
+-03-20  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Better line/column reporting for "duplicate attribute"
+         errors.  Line/column markings for DOCTYPE, comment, and
+         character tokens are reintroduced; otherwise,
+         error location for "not HTML5" error and errors
+         for implied elements are not attached.
+-03-20  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Set line/column numbers to attributes.
+         * NanoDOM.pm (create_attribute_ns, set_attribute_node_ns): Added.
+         (value): Setter implemented.
+         * mkhtmlparser.pl: Set line/column numbers to Attr nodes.
+-03-20  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Unused line/column markings are removed.
+-03-20  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (_get_next_token): Remove |first_start_tag|
+         flag, which is no longer used.
+-03-17  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Set line/column information to element nodes.
+         * mkhtmlparser.pl (!!!create-element, !!!insert-element,
+         and !!!insert-element-t): Set line/column information to
+         element nodes.
+-03-17  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (_get_next_token): The first "<" character
+         in "<?", "<>", or "</>" should be the error point.
+-03-16  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Some more fixes on error position reporting.
+-03-16  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Token-level precious error reporting.
+-03-16  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Preparation for more precious error point
+         reporting.
+-03-11  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Error type revised.
+-03-11  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Similar codes are merged together, again.
+-03-11  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Similar codes are merged together.
+-03-10  Wakaba  <wakaba@suika.fam.cx>
+         * mkhtmlparser.pl: Set "level" parameter to parse errors.
+         * HTML.pm.src: Code refined.
+-03-09  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |</body>| treatement has been changed (HTML5
+         revision 1348).  Note that I really don't know this makes
+         any difference in the black-box behavior of the parser.
+-03-09  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: New end-of-file token implementation (HTML5
+         revision 1348).
+-03-09  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |applet| support (HTML5 revision 1347).
+-03-09  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Foster parenting in AAA (HTML5 revision 1343).
+-03-09  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for |<input>| in the "in select" insertion
+         mode and support for the "in select in table" insertion mode (HTML5
+         revision 1342).
+-03-09  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: No foster parenting for <script> and <script>
+         in non-tainted <table>s (HTML5 revision 1336).
+-03-09  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Ignore white space characters between <html>
+         and <head> (HTML5 revision 1332).
+-03-09  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Treat <input type=hidden> as if it were a
+         white space (HTML5 revision 1331).
+-03-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Ignore U+000A at the beginning of a |listing|
+         element (HTML5 revision 1330).
+-03-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: <title> is always appended to the current
+         element (HTML5 revision 1328).
+-03-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: White space in tainted tables are moved
+         into foster parents (HTML5 revision 1326).
+-03-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Reduce errors from foster parenting cases (HTML5
+         revision 1321).
+-03-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |</h/n/>| case code rearranged to align with
+         the spec (HTML5 revision 1320).  Note that we finally complete
+         all of HTML5 revision 1320 changes.
+-03-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |</form>| now works similar to |</div>| for unclosed
+         tags (HTML5 revision 1320).
+-03-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |</p>| case rearranged with no actual change in fact.
+-03-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: A "generate implied end tags" code (t409.1)
+         could not be reached so that it is now removed (HTML5 revision
+).
+-03-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Code for the case of |</div>| and so on are revised
+         to align with new spec text (HTML5 revision 1320).
+-03-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Remove strange |if| condition; however, it should
+         have had no harm in theory.
+-03-08  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (_tree_construction_main): '</p>' in body
+         case is split from other end tags for the preparation
+         of implementing HTML revision 1320.
+-03-07  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Simplified "generate implied end tag" (HTML5
+         revision 1320).
+-03-07  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (_tree_construction_main): Merge rules for "h1"
+         and "div" (HTML5 revision 1318).  Add comments to where
+         |form| pointer association codes should be inserted (HTML5 revision
+).
+-03-06  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: <html> treatement refined (HTML5 revision 1314).
+-03-05  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Since the case t268 should never be reached (no
+         other token type, there are), it is replaced by a |die| statement.
+-03-05  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Typo fixed.
+-03-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (_tree_construction_initial): Some limited quirks
+         doctypes were not uppercased for comparison.
+-03-03  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (tree construction and set_inner_html): Checkpoints
+         are added.
+-03-03  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (_tokenize_attempt_to_consume_an_entity): Checkpoints
+         are set.  Cases that are unlikely reached are noted as so.
+-03-03  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Checkpoints for debugging are added.
+         * mkhtmlparser.pl: Support for |!!!cp| syntax.
+-03-03  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src, mkhtmlparser.pl: s/_input_character/_char/g
+         for simplicity.
+-03-03  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Flag name changed: s/correct/force-quirks/g (HTML5
+         revision 1307).
+-03-03  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (_get_next_token): Where the /incorrect/ flag
+         is set are changed (HTML5 revision 1305).
+-03-02  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Raise a parse error for |<span ===>| (HTML5 revision
+).  Entities are not parsed in comment-like part in RCDATA
+         elements (HTML5 revision 1294).  Allow bare & at the end
+         of attribute value literals (HTML5 revision 1296).  More
+         quirks mode doctypes (HTML5 revision 1302).  Requires spaces
+         between attributes and ban attribute names or unquoted
+         attribute values containing single or double quotes (HTML5
+         revision 1303).
+-03-02  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Typo fixed.  Don't raise "character encoding"
+         and related errors unless it is an HTML document (though the spec
+         is unclear on whether it is applied to XHTML document).
+         * HTML.pm (%HTMLAttrStatus): WF2 repetition model attributes
+         are added.
+-03-02  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: s/local_name/manakai_local_name/g.
+-03-01  Wakaba  <wakaba@suika.fam.cx>
+         * _NamedEntityList.pm: Updated (HTML5 revision 1286).
+         * HTML.pm.src: |charset| in |content| attribute is
+         case-insensitive (HTML5 revision 1270).
+-02-26  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: New status constants are added.
+         ($ElementDefault): |status| added.
+         (check_element): Err for non-standard or deprecated elements.
+         (_attr_status_info): For non-standard or deprecated attributes.
+-02-24  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (_attr_status_info): New internal method.
+-02-24  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_element): Element standardized
+         status information is now dispatched.
+-02-24  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_element): Fix |del|-and-significant
+         problem by adding some more arguments.
+-02-24  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_element): Use context of
+         container-for-the-purpose-of-content-model element (not transparent
+         element) for |check_child_element| calling and significant
+         text flag marking.  This reintroduces |<del>|-and-significant
+         problem again.
+-02-24  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_element): Make semi-transparent
+         elements ignored for the purpose of phase changes in
+         content model checking.
+-02-23  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_element): In-element state
+         was not properly managed for transparent cases.
+-02-23  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_element): Support for |video|
+         and |audio| as semi-transparent elements.
+-02-23  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm ($HTMLSemiTransparentElements): New.
+         (check_element): s/minuses/minus_elements/, s/pluses/plus_elements/.
+         Support for |html:object| as a semi-transparent element.
+-02-23  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_element): The way to traverse
+         the tree is entirely revised to make it easier to track
+         the state of ancestors/descendants.  As a result of this
+         revision (which rewrites almost all of Whatpm::ContentChecker::HTML),
+         support for content model checking for HTML elements |figure|,
+         |object|, |video|, and |audio| and checking for XML elements (and
+         some XMLNS checkings) are dropped for now.  They will be
+         reimplemented in due cource.
+-02-17  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |>| in public or system literal closes the DOCTYPE
+         token (HTML5 revision 1225).
+-02-17  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm ({unsupported_level}): New value.
+         * HTML.pm.src: Save whether |meta| |content| attribute
+         contains character references or not.
+-02-17  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (_get_children): (Incompleted) attempt to
+         imlement significant content checking for contents
+         with |del| elements.
+-02-17  Wakaba  <wakaba@suika.fam.cx>
+         * ContenteChecker.pm ($HTMLTransparentElements): More
+         elements are added.
+         (_get_children): HTML |object| elements are now semi-transparent.
+         * NanoDOM.pm (manakai_html, manakai_head): New methods.
+-02-16  Wakaba  <wakaba@suika.fam.cx>
+         * CacheManifest.pm: HTML5 revision 1211 implemented.
+         * CacheManifest.pod: Updated.
+-02-10  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_document, check_element): Support
+         for second argument ($onsubdoc).
+         (_get_css_parser): Removed (now it is part of WDCC).
+-02-09  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (_get_css_parser): New.
+-11-25  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm ($AnyChecker): Old way to add child elements
+         for checking had been used.
+-11-25  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_element): New todo item type |descendant|.
+-11-23  Wakaba  <wakaba@suika.fam.cx>
+         * IMTChecker.pm: Revised to raise errors and warnings as (poorly)
+         specced in RFC 2046 and RFC 4288.
+         (application/atom+xml): Definition added.
+-11-23  Wakaba  <wakaba@suika.fam.cx>
+         * URIChecker.pm: Make RFC 3986 should-level errors
+         warnings (rather than SHOULD-level errors).
+-11-23  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (get_user_data, set_user_data): New methods.
+         * HTML.pm.src: A flag for character references in attribute
+         values are added.  Set |manakai_has_reference| user data
+         to |charset| attribute.
+-11-23  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (input_encoding, manakai_charset, manakai_has_bom): New
+         attributes.
+         * ContentChecker.pm (check_document): Warn if charset requirements
+         cannot be tested.
+-11-19  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_byte_string): Detect charset
+         by universalchardet if charset parameter is not specified.
+         * Makefile (Charset-all, Charset-clean): New rules.
+-11-18  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_document): Check the existence
+         of character encoding declaration and selection of encoding
+         for HTML document.
+-11-18  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm (get_sniffed_type): Return also the official
+         type in list context.
+-11-18  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm: Sniffing with leading white space
+         ignoring (HTML5 revisions 1013 and 1016).
+-11-18  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm: HTML5 revision 1013 changes, except for leading
+         white spaces, are implemented.
+-11-11  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_char_string): Set |inner_encoding|
+         attribute if possible.
+-11-11  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (parse_byte_string): New method.
+         (parse_char_string): New alias for |parse_string|.
+         (main phase): Invoking "change the encoding" algorithm if desired.
+         * HTML.pod: Updated.
+-11-11  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pod (get_inner_html): Removed.
+         * Makefile (HTML-all, HTML-clean): New.
+-11-11  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (get_inner_html): Removed (moved to HTML/Serializer.pm).
+-11-08  Wakaba  <wakaba@suika.fam.cx>
+         * mklinktypelist.pl: s/noreferer/noreferrer/ (HTML5 revision 1132).
+-11-04  Wakaba  <wakaba@suika.fam.cx>
+         * Makefile: |CacheManifest.html| is added.
+         * CacheManifest.pod: New file.
+-11-04  Wakaba  <wakaba@suika.fam.cx>
+         * CacheManifest.pm: New module.
+-11-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Support for application cache selection algorithm
+         callback.
+-11-04  Wakaba  <wakaba@suika.fam.cx>
+         * mklinktypelist.pl: Support for rel=noreferer (HTML5 revision 1118).
+-10-17  Wakaba  <wakaba@suika.fam.cx>
+         * Makefile (clean): New rule.
+         * NanoDOM.pm (public_id, system_id): New attributes.
+-10-17  Wakaba  <wakaba@suika.fam.cx>
+         * Makefile (CSS-all, CSS-clean, clean): New rules.
+-10-14  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_document): Support for
+         new |is_xml_root| flag.
+         (check_element): Support for new |pluses| state.
+         (_add_pluses): New method.
+         (_remove_minuses): Support for new |minus| item.
+-09-24  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Raise specific error for invalid
+         root element.
+-09-24  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Set level values for later uses.
+-09-09  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Support for language tag validation.
+-09-09  Wakaba  <wakaba@suika.fam.cx>
+         * LangTag.pm (check_rfc3066_language_tag): New method.
+-09-09  Wakaba  <wakaba@suika.fam.cx>
+         * LangTag.pm: New module.
+-09-04  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Some error types were wrong.
+-08-17  Wakaba  <wakaba@suika.fam.cx>
+         * CSS/: New directory.
+-08-17  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (_check_get_children): Support
+         for |noscript| in |head|.
+-08-12  Wakaba  <wakaba@suika.fam.cx>
+         * URI/: New directory.
+-08-11  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Tokenizer's states are now represented in
+         number.
+-08-11  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |or|s for insertion modes are replaced
+         by |&|s.
+-08-11  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Token types are now represented in number.
+-08-11  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm (SEE ALSO): Updated.
+         * HTML.pm.src: Insertion modes are now represented in number.
+-08-11  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm: Sniffing for bitmap images (HTML5 revision
+) is implemented.
+-08-08  Wakaba  <wakaba@suika.fam.cx>
+         * ContentType.pm: Sniffing for |<script| (HTML5 revision
+) is implemented.
+-08-06  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pod: New documentation.
+         * Makefile: A rule for |ContentChecker.html| is added.
+         * ContentChecker.pm: A pod "LICENSE" section is added.
+         * NanoDOM.pm ($VERSION): New variable.
+-08-05  Wakaba  <wakaba@suika.fam.cx>
+         * H2H.pm: |b|, |i|, and |sub| are added to the
+         list of allowed HTML elements.
+-08-05  Wakaba  <wakaba@suika.fam.cx>
+         * H2H.pm: |samp| is added to the list of allowed
+         HTML elements.
+         * URIChecker.pm (check_iri): New.
+         (check_iri_reference): Error type for IRI reference
+         syntax error is changed.
+-08-04  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Reference to the |Whatpm::ContentChecker::Atom|
+         is added.
+         (check_document): Load appropriate module before validation.
+-08-04  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker/: New directory.
+-08-04  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: HTML |time| element is implemented.
+         * HTMLTable.pm: Comments are updated as HTML5 is revised.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (check_document): Return value
+         even if no document element is found.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |$in_body| is no longer a function.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: The |$in_body| code has been moved down.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: The "trailing end" insertion mode
+         is split into "after html body" and "after html frameset"
+         insertion modes.  Their codes are merged with "after body"
+         and "after frameset" codes.  |$previous_insertion_mode|
+         has been removed.  "after frameset" code is
+         merged with "in frameset" code.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: The "before head" insertion mode is
+         merged with the "in head" insertion mode.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Cases in "in head" insertion mode are
+         reorganized.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Some cases in "in table" insertion mode
+         are merged.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: The "in row" insertion mode is merged
+         with "in table" insertion mode.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: The "in table" and "in table body" insertion
+         modes are merged.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: There is no "in table head" or "in table foot"
+         insertion mode!
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |<noframes>| "in frameset" and "in noframes"
+         now directly invoke the handler.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Codes for "in cell" insertion mode
+         is merged to the "in body" insertion mode code.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Codes for "in body" and "in caption"
+         insertion modes are merged.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Two |!!!next-token|s were missing.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Use numeric constant for |{content_mode}|
+         instead of string constant for |{content_model_flag}|.
+-07-21  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Add the name of the attribute
+         to the "duplicate attribute" error.
+-07-17  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Return the |class| node list.
+-07-17  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Return the |id| node list.
+         * HTML.pm.src: A typo is fixed.
+-07-16  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Drop wrong |level => 'error'| specification
+         from "in HTML:xml:lang" error.  Character position
+         is now the last part of the error type in the URI error
+         description.  Report "unsupported" status for language
+         tags, media queries, script codes, and style sheets.
+-07-16  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Report error if |xml:lang|
+         in HTML, |lang| in XML, |xmlns| in XML, and |meta| |charset|
+         in XML.
+         * NanoDOM.pm (Attr.owner_document): New attribute.
+-07-16  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: The character immediately following
+         a bare |hcro| was discarded.  Fix handling of
+         entity references in attribute values.
+-07-16  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (main and trailin end phases): Token
+         types |DOCTYPE|, |comment|, |end-of-file|, and |<html>| are
+         factored out.  Error types |in html:#DOCTYPE|
+         and |after html:#DOCTYPE| are merged
+         into |DOCTYPE in the middle|.  |</frameset>|
+         in fragment parsing mode changed the
+         insertion mode.
+-07-16  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |$phase| has been removed; The |trailing end|
+         phase is now an insertion mode.  Treatments for white
+         space character tokens were incorrect for some
+         insertion modes.  An old |meta| case was not removed.
+-07-16  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |meta| charset declaration extraction
+         implemented (but changing the encoding is not yet:-).
+-07-15  Wakaba  <wakaba@suika.fam.cx>
+         * Charset/: New directory.
+-07-15  Wakaba  <wakaba@suika.fam.cx>
+         * H2H.pm: New Perl module (created from
+         manakai's H2H.dis).
+-07-15  Wakaba  <wakaba@suika.fam.cx>
+         * XMLSerializer.pm: New Perl module (created from
+         manakai's SimpleLS.dis).
+-07-07  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |<!---x-->| was not processed correctly.
+-07-01  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Report correct error message
+         for |<body></div></body>|.
+-07-01  Wakaba  <wakaba@suika.fam.cx>
+         * HTMLTable.pm: An error description was incorrect.
+-06-30  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Return |{term}| list.
+-06-30  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revisions 961-966 (</p>, </br>,
+         nested <nobr>, implied </tbody>, </tfoot>, and </thead>,
+         and <title> outside of head).
+-06-30  Wakaba  <wakaba@suika.fam.cx>
+         * IMTChecker.pm: Report warning for unregistered
+         and private types/subtypes.
+         * ContentChecker.pm, HTML.pm.src, IMTChecker.pm,
+         URIChecker.pm, HTMLTable.pm: Error messages are now
+         consistent; they are all listed in
+         <http://suika.fam.cx/gate/2005/sw/Whatpm%20Error%20Types>.
+-06-25  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: |<img ismap>| not in |<a></a>|
+         is now erred.  |<datalist>| is implemented.
+         Attribute checker for |<command>| and |<menu>| are
+         added.  Support for |contextmenu| global attribute
+         is added.
+-06-25  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (_reset_insertion_mode): Interpretation
+         of Step 3 has been changed.
+-06-25  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Late |<html>| parse error is implemented.
+-06-24  Wakaba  <wakaba@suika.fam.cx>
+         * URIChecker.pm (check_iri_reference): A |decode| method name was
+         incorrect.
+         * ContentChecker.pm: Support for the |footer| element.
+         Check URI syntax for space-separated URI attributes.
+         Support for the |tabindex| attribute.  Support
+         for |datetime| attribute.
+-06-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revision 1.144 (&#x0D;) and 1.145 (invalid
+         character references).  HTML5 revision 1.146 (white space
+         characters before root start tag).  HTML5 revision
+.148 (named character references in attribute values).
+         HTML5 revision 1.152 (<plaintext>.innerHTML get).
+-06-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revisions 1.142 and 1.143 (<noscript>
+         in <head>).
+-06-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revision 935 (<base>, <link>, <meta>
+         in body).
+         * ContentChecker.pm: HTML5 revision 938 (scoped="").
+-06-24  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revision 923 (matching end tag in CDATA
+         or RCDATA in fragment parsing mode).  HTML5 revision
+(<!--> and <!--->).  HTML5 revision 926 (hn in hn).
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (get_inner_html): HTML5 revision 922 (inner_html
+         for <pre> and <textarea>).
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revision 920 (<isindex>).
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revision 918 (</head>, </body>, </html>).
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revision 916 (</body>).
+         HTML5 revision 917 (conforming bare &).
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (manakai_is_html): Setting to false did not work.
+         * HTML.pm.src: HTML5 revision 914 (</ in CDATA, RCDATA).
+         HTML5 revision 915 (<nobr>).
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revisions 908, 909, 912, and 913 (quirks mode).
+         * NanoDOM.pm (manakai_is_html, manakai_compat_mode, compat_mode):
+         New attributes.
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revisions 900, 901, 902, and 911 (<
+         in tags).
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * .cvsignore: |Entities.html| is added.
+         * HTML.pm.src: |$entity_char| is removed and
+         requires |Whatpm::_NamedEntityList| instead.
+         HTML5 revision 898 (refc), except that lack of refc
+         is parse error.
+         * mkentitylist.pl: New script.
+         * Makefile (all): |_NamedEntityList.pm| is added.
+         (_NamedEntityList.pm, Entities.html): New rules.
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: Parse errors immediately after U+000D
+         were ignored and U+000D immediately following another
+         U+000D was not converted to U+000A.
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src (set_inner_html): HTML5 revision 892 (adopt
+         nodes before appended).  Parser was not ready for NULL
+         parse error and escape flag.
+         * NanoDOM.pm (adopt_node): New.
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revision 886 (insane comment in
+         CDATA and RCDATA).  Note that current implementation
+         is simply repeating what the spec says and it is maybe not
+         a best way to do it.
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revision 884 (</form> don't close
+         the form element if a descendant element without implied end tag has
+         still been open).
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: HTML5 revision 881 (Make |id| attribute with
+         space characters non-conforming).
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: An error message was incorrect.
+         HTML5 revision 869 (C1 character references).
+-06-23  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: HTML5 revision 867 (a LF at the beginning of
+         a |textarea| is removed).
+-06-05  Wakaba  <wakaba@suika.fam.cx>
+         * NanoDOM.pm (get_attribute_node_ns): New method.
+         * ContentChecker.pm: |script| |async| and |defer|
+         no longer require |src|.  |async| MUST NOT be
+         specified if |defer|.  (HTML5 revision 858).
+-05-30  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: |<form><form>| went to inifinite loop.
+-05-27  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (html): Set |is_root| (allowed
+         as a document element) flag on.
+         (new): Removed.
+         (check_document): New method.
+-05-27  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm (thead, tfoot): Checker specifications
+         were incorrect.
+-05-27  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm ($HTMLURIAttrChecker): Include
+         error position in the |type| option of the error.
+         * HTMLTable.pm (form_table): The |$onerror| parameter
+         is now optional.  Some bugs are fixed.
+-05-27  Wakaba  <wakaba@suika.fam.cx>
+         * HTMLTable.pm: New module.
+         * ContentChecker.pm (table): Invoke table model error checker.
+         * NanoDOM.pm (first_child, get_attribute_ns): New.
+-05-26  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm ($HTMLLinkTypesAttrChecker): New checker.
+         (link/@rel, a/@rel, area/@rel): Use new checker.
+         * Makefile (_LinkTypeList.pm, RelExtensions.html): New rules.
+         * _LinkTypeList.pm: New file.
+         * mklinktypelist.pl: New file.
+         * .cvsignore: |RelExtensions.html| added.
+         * NanoDOM.pm (child_nodes): Returns an empty array
+         for non-child-containing node types.
+         (text_content): New attribute.
+-05-26  Wakaba  <wakaba@suika.fam.cx>
+         * IMTChecker.pm: New module.
+         * ContentChecker.pm ($HTMLIMTAttrChecker): Call IMTChecker
+         to test parameter value validity.
+         * HTML.pm.src ($style_start_tag): Attributes were
+         discarded.
+-05-25  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm ($HTMLURIAttrChecker): Implemented.
+-05-25  Wakaba  <wakaba@suika.fam.cx>
+         * URIChecker.pm: All recommendations from RFC 3986
+         and RFC 3987 are listed (not all testable items are checked yet).
+-05-25  Wakaba  <wakaba@suika.fam.cx>
+         * URIChecker.pm: New module.
+-05-20  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Now most attributes are implemented
+         or associated to some placeholder.
+         ($ElementDefault): Warn unknown attributes
+         for unknown elements as "attribute not supported".
+         ($HTMLLanguageTagAttrChecker, $HTMLMQAttrChecker): New placeholders.
+         ($HTMLUsemapAttrChecker, $HTMLTargetAttrChecker): New checkers.
+         (|a| attribute checker): Reimplemented.
+-05-20  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm ($HTMLEventHandlerAttrChecker): New placeholder.
+         ($HTMLAttrChecker): Event handler content attributes
+         are added.
+         (link, embed): Required attribute is now checked.
+         (embed): Unknown local attributes are no longer warned.
+-05-20  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm ($HTMLSpaceURIsAttrChecker): New placeholder.
+         ($HTMLIMTAttrChecker): New checker.
+         (link@rel, link@href, link@type, style@type,
+         a@href, a@ping, a@ping, a@type, embed@src, embed@type,
+         object@data, object@type, source@src, source@type, area@alt,
+         area@shape, area@coords, area@href,
+         area@ping, area@rel, area@type, script@src,
+         script@defer, script@async, script@type): Checkers added.
+-05-20  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Descendant checking was incorrect.
+-05-19  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Support |xml:*| and |xmlns:*|
+         attributes.  Report an error if |Element.prefix|
+         is |xmlns|.
+         * NanoDOM.pm (prefix): New attribute.
+-05-19  Wakaba  <wakaba@suika.fam.cx>
+         * HTML.pm.src: In |main| phase, |in body| insertion
+         mode, action for |<iframe>| was missing.
+-05-19  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Support for many of HTML5 elements.
+         ($GetHTMLNonNegativeIntegerAttrChecker): New.
+-05-19  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Support for most elements up to |progress|.
+         ($HTMLURIAttrChecker): Placeholder.
+         ($HTMLIntegerAttrChecker, $GetHTMLFloatingPointNumberAttrChecker):
+         New.
+-05-19  Wakaba  <wakaba@suika.fam.cx>
+         * ContentChecker.pm: Attribute checkers
+         for global attributes, |html|, |base|, |style|, and |meta|.
+         * NanoDOM.pm (insert_before): Weaken reference
+         to the parent node.
+         (Attr::new): Set |owner_element| attribute.
+         (namespace_uri, manakai_local_name): New attribute implementations.
+         (owner_element): New attribute.
 -05-19  Wakaba  <wakaba@suika.fam.cx>
          * ContentChecker.pm ($AttrChecker, $HTMLAttrChecker,

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