Oops, pressed Send a little too soon: Craig: DocBook is the best known and I think the oldest SGML DTD for structured documentation. Another is IBMIDDoc, which is used in-house at IBM. Both were designed with traditional technical manuals in mind. It's not that they're limited to paper output or a particular page layout. It's just that when the designers thought about how to classify all the parts of a document, the sort of document they had in mind (perhaps unconsciously) was the cover-TOC-part-chapter-subheading-appendix-index sort. DITA is a newer DTD, this time implemented in XML and designed for flexible, topic-based documents. We know more about designing help systems and online documents, and have better search engines and library tools, so the DTDs can now cater for these better. Hope this helps --- Stuart Burnfield Information Developer and all-round Tag Dag Australian Programming Centre ************************************************** To post a message to austechwriter, send the message to austechwriter@xxxxxxxxxxxxxx To subscribe to austechwriter, send a message to austechwriter-request@xxxxxxxxxxxxx with "subscribe" in the Subject field. To unsubscribe, send a message to austechwriter-request@xxxxxxxxxxxxx with "unsubscribe" in the Subject field. To search the austechwriter archives, go to www.freelist.org/archives/austechwriter To contact the list administrator, send a message to austechwriter-admins@xxxxxxxxxxxxx **************************************************