Hi all, I've added some documentation to htfgen
https://github.com/michal-h21/htfgen this is a tool to generate htf files for tex4ht, this task is even more difficult than I thought, but I was able to make working htf files for standard text fonts. The main difficulty are math and virtual fonts, it seems that lot of hand editing will be needed for math fonts, as their encoding files often doesn't provide useful information. Michal
