I recently started playing with LuaTex to see whether it is suitable for addressing the following problem:
For every math formula in a document I'd like to generate an equivalent content MathML expression and write it out into a separate file. Content MathML doesn't require any style elements. I thought the mlist_hlist callback function may be suitable for this task. However, I couldn't find any suitable examples on how to use the mlist_to_hlist callback. I also looked briefly into the code base: "texmath.w". Here, it seems like that the after_math function could neatly implement another mlist related callback, right after the call to the fin_mlist routine (line 2249). The proposed callback function would take an mlist as the argument and return either the same mlist or a modified mlist, which would then be processed into an hlist. I just put out this idea for discussion to see whether somebody else has a better idea? Thanks, Frank
