XHTML - slide "Modularization methodology (simplified)"

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;

Separate W3C recommendation for the detailed methodology
- Usable by other XML applications (SMIL2, soon SVG)