- Modularization is based on DTD fragments
- In file
xhtml-image-1.mod:<!ELEMENT img "EMPTY"> <!ATTLIST img %Common.attrib; src %URI.datatype; #REQUIRED alt %Text.datatype; #REQUIRED longdesc %URI.datatype; #IMPLIED height %Length.datatype; #IMPLIED width %Length.datatype; #IMPLIED> - In XHTML-XX DTD:
<!ENTITY % xhtml-image.mod PUBLIC "-//W3C//ELEMENTS XHTML Images 1.0//EN" "xhtml-image-1.mod" > %xhtml-image.mod;
- In file
- Separate W3C recommendation for the detailed methodology
- Usable by other XML applications (SMIL2, soon SVG)