Howdy, at OSCOM I just noted slideML, and I had to think, uh-oh, another set of XML tags? <smile/> I appreciate the novelty of XInclude, and DC can be handy but have you considered the benefits of using native *XHTML* -- or SVG? http://dev.w3.org/cvsweb/slidemaker/ http://www.w3.org/Talks/Tools/how-to-use-w3ctalk-proj.html http://www.w3.org/Consortium/Offices/Presentations/xsltSlidemaker/
Or, I suspect you are sufficiently invested that you want to stick with what you have, but do I understand you don't have an HTML converter yet? (I do see XML+CSS and XSLT->SVG.)
