XHTML documentation describes each of the element declarations in your DTD, including its declared attributes, element content model, and the elements by which it is referenced. The IDE enables you to automatically generate XHTML documentation for any DTDs that are mounted in the IDE.
The IDE creates an HTML document that contains the DTD's documentation.
You can add additional information to an element declaration's description by inserting a DTDDoc comment before the element declaration in the DTD. You can format the DTDDoc comment's appearance by using any XHTML tags allowed by the <DIV> element, as shown in the following example:
<!--- <b>The root element:</b> <ul> <li>Contains one or more item elements.</li> <li>Sets attributes for item elements.</li> </ul> --> <!ELEMENT root ANY>