Am 2015-09-12 um 17:37 schrieb Toby Miller <tobycmiller@gmail.com>:

> I have a few other things I'd like to be able to do with this kind of
> thing (print '<br />' self-closed tags for example, and add attributes
> as you say), but I feel bad about posting to the list for them. Is there
> any documentation for these features at all? I couldn't find any
> reference to the \startelement command when I looked, but perhaps I'm
> looking in the wrong place.
>
> I'll take your advice and not try to adapt the export system. Now that I
> can print tags at least I think XML transformation should be able to
> deal with everything I need if it comes to it.

Hi Toby, have a look at

http://wiki.contextgarden.net/XML
http://wiki.contextgarden.net/Export
http://wiki.contextgarden.net/ePub

Since my ePub workflow is now running, I’ll hopefully soon enhance these pages...

There’s also a useful manual in texmf-context/doc/context/documents/general/manuals/epub-mkiv.pdf

Do you know a good XSLT processor except Saxon? Its free version is just too limited.