> What do you mean by DTD XML? All the standard XML data files follow a > DTD (document type definition).
This is what Tralics papers say and then add "similar to TEI XML". Perhaps there are some more relaxed XMLs around that are not DTD. Or perhaps theirs is a unique XML that is similar to TEI and also DTD compliant. Something like this, I guess. > If Tralics is doing a good job, why do you want to change it? Tralics is incomplete. There are things it does not do. For example, it does not do math drawings. It does not refer to theorems and so on. It's a question of long-term strategy too. Here's my salesman pitch: on-line education is coming. It's become a hot issue in the US already with top universities actively engaged. So we need TeX to produce XML (or HTML5 at the very least) and it needs to be done by TeX itself, that is, from within the official TeX distribution suite. The approach taken by Tralics and LaTeXML is to work from the LaTeX source and convert "the meaning" of constructs encountered to XML/MathML. But for this to work, there must be a special substitute for every LaTeX package included in the source. The resulting conversion may break on silly things like, say, direct TeX commands, for example LaTeXML does not know about "\mathinner", so I can't include the braket package. Tralics alters TeX semantics in subtle ways, e.g., with equation numbering and references, and with spacing around brackets. To convert from dvi instead can give the system more flexibility, and we already have dvipdfm and similar example applications that show how to read the file and how to construct the output in, say, page description language such as PDF. And this is exactly what TeX4ht is trying to do, so it looks like a good way forward. There may be some money available to people working on this too. Various private foundations, companies and institutions, e.g., Coursera, EdX, Google, Blackboard, Moodle, are already supporting on-line tuition projects, and they could as well extend the helping hand to TeX4ht. Cheers, Zdzislaw (Gustav) Meglicki Indiana University http://perth.ovpit.indiana.edu
