DocBook is originally an SGML-based vocabulary (I believe DocBook 5 is XML only, with only marginal changes from DocBook 4), so you can always use SGML short re

DocBook is originally an SGML-based vocabulary (I believe DocBook 5 is XML only, with only marginal changes from DocBook 4), so you can always use SGML short references to create your own own little custom Wiki or casual math syntax. Or you can use pandoc to write markdown syntax and convert to DocBook or PDF or whatever. I guess DocBook is mostly for whole books, but the one conference paper I did using DocBook was a pleasant experience; the workflow and results, apart from the PDF produced by LaTex which of course was fantastic-looking, were much better than using LaTeX, publisher-specific LaTeX templates, and in particular latex2html if you want to publish your paper on your home page. Even when using LaTeX for an ACM-published paper (not a math-heavy one, though), I ended up using pandoc for converting LaTeX to HTML because the result of latex2html was unusable, attempting to exactly match two-column layouts, screwing up semantic text order, biblio formatting etc.