If I understand you correctly, then I have done just this.I used XML,
XSL and DTD with Java to accomplish this.
-----------------------------------------
Here is my problem:
- We have data, in POJOs
- We need to output the data in XML format, according to a DTD
- The recipient of the XML may not have access to the Web, therefore
  we need an internal DTD
- DOM2 could NOT set the DTD internally, only read it.

..and solution:
- I have an XSL file that is my template, it contains both the DTD and
the transform
- I have a java file that creates the XML DOM from a Bean object
(POJO)
- I transform the XSL and DOM into the resulting XML:
<code>
transformer = XslTransformation.getInstance().getTransformer(
"xsl-file" );
transformer.transform(new DOMSource( java-dom ), new StreamResult(os));
</code>
- The resulting XML is validated against the internal DTD

xsl file:
<code>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
   <xsl:output method="xml" encoding="ISO-8859-1" indent="yes"/>
   <xsl:template match="RootElement">
       <xsl:text disable-output-escaping="yes">
           <![CDATA[
       <!DOCTYPE RootElement [
           <!ELEMENT OtherElement EMPTY>
           <!ATTLIST OtherElement DATATYPE NMTOKEN #FIXED "BOOLEAN"
VALUE NMTOKEN #REQUIRED>
           <!ELEMENT RootElement (List+)>
           <!ELEMENT List>
       ]>
       ]]>
       </xsl:text>

       <RootElement>
           <xsl:apply-templates select="List"/>
       </RootElement>

   </xsl:template>

   <xsl:template match="List">
       <List>
    ...more elements and attlists..
       </List>
   </xsl:template>

</xsl:stylesheet>
</code>
--------------------------------------
I think I know what you want, and I hope any of this helps.
asaguden