Converting lilypond to music xml

[Alastair Irving]

Hello List

I'd be very surprised if this hasn't been asked before, but searches of 
the archives haven't turned up anything useful.  Is there any way of 
converting lilypond files into music xml?  If not, are there any plans 
for such a tool?

I use software to convert music into Braille, and it only accepts input 
in xml.  Currently, my only method is to do OCR on the pdf output and 
then correct any errors, which seems rather ludicrous.

Alastair Irving