I. Changes from XHTML Modularization 1.0

This appendix is informative.

This specification supercedes XHTML Modularization 1.0. This section describes at a high level the changes from that version. This section does not attempt to address the various editorial corrections that were made. For a detailed comparison, see the "diff marked" version from that recommendation.

• Global Changes
  • Introduction of an XML Schema implementation. This includes the development of a Modularization technique to be used with XML Schema, and the actual implementation of the abstract modules using that technique.
  • Clarified that in XHTML Family Languages the "default" behavior of XML whitespace processing is "preserve" as defined in [XML].
• Section 2 - Terms and Definitions
  • Added a definition of the term "facilities".
• Section 3 - Conformance Definition
  • Clarified that attributes from the XHTML namespace can be used on elements NOT in the XHTML namespace, but they should be namespace-qualified.
  • Clarified the rules for processing of unrecognized elements in conforming user agents.
  • Removed the whitespace handling rules, deferring instead to the rules in [CSS2].
• Section 4 - Defining Abstract Modules
  • Removed PCDATA from the table of attribute types, since it is not an attribute type.
  • Clarified that Language Codes are defined by [BCP47].
  • Added a note that additional LinkTypes can be defined, but should be described in a profile.
  • Added a definition for the datatypes QName and QNames
  • Clarified that the datatype URI is the same as that of anyURI in [XMLSCHEMA].
• Section 5 - Attribute Collections
  • Clarified that attributes defined in XHTML attribute collections are available for use on elements in other namespaces if they are referenced using their namespace qualified form.
  • Added xml:space to the Core attribute collection, so that it is available on all elements. Also removed any explicit references to xml:space from other elements.
  • Corrected the definition of xml:lang to take CDATA, not NMTOKEN.
  • Added the id attribute to every element.
  • Corrected the minimal content model for blockquote.
  • Clarified that the Basic Forms Module cannot be used in conjunction with the Forms Module.
  • Clarified that the Basic Tables Module cannot be used in conjunction with the Tables Module.
  • Corrected the minimal content model for legend so that it can be empty.
  • Corrected the types of attributes on the table element in the Basic Tables Module.
  • Formally deprecated the Legacy Module.
  • Corrected the align attribute values on the img element in the Legacy Module.
  • Corrected the height attribute type on the th element in the Legacy Module.
  • Corrected the width attribute type on the td element in the Legacy Module.
• Appendices A, B, C - XML Schema Implementation

  This is new content in this specification. It was developed independently and has already gone through the W3C processes including Last Call.

• Appendix D - Building DTD Modules
  • Corrected an XMLNS reference in the Inventory module example.
  • Migrated references to XHTML Modules to "w3.org/MarkUp/" space instead of "TR" space.
• Appendix E - Developing DTDs with defined and extended modules
  • Migrated references to XHTML Modules to "w3.org/MarkUp/" space instead of "TR" space.
  • Corrected the handling of prefixed elements in the MyML example.
• Appendix F - XHTML DTD Module Implementations
  • Migrated references to XHTML Modules to "w3.org/MarkUp/" space instead of "TR" space.
  • Added "prefixed" declarations of global attributes for use in other, non-XHTML namespace markup languages.
  • Corrected the content model of body so that the body is permitted to be empty.
• Appendix G - References

  Updated references to make them current.

  • Added reference to [RFC3987].