On 2/25/2011 12:08 AM, Keith J. Schultz wrote:
3. Given that we share a primary interest in books (text), it makes sense that the XML should conform to the XHTML doctype.
WHY? For example epub does require any adherence to the XHTML, Just to XML version 1.0 !!!
See: http://idpf.org/epub/20/spec/OPS_2.0.1_draft.htm#TOC2.0 "This specification no longer creates its own subset of XHTML 1.1, but instead references entire XHTML modules, as described in XHTML Modularization 1.1" The spec goes on to also accept DTBook (which is also based on XML 1.0) as a "Preferred Vocabulary," but I think that was included primarily for political reasons; to my knowledge no-one is producing ePubs using DTBook, so for all practical purposes ePub /is/ XHTML. The ePub 3.0 draft document indicates the desire to adopt HTML5, /in toto/ and specifies that HTML5 must be expressed in XML syntax (http://idpf.org/epub/30/spec/epub30-contentdocs.html#sec-contentdocs). If you want to do ePub, you must do XML.