[xml] Binary serialization/deserialization of xmlDocPtr?

[Aleksander Øhrn <Aleksander Ohrn fast no>]

Hi,

I have a small search application where XML gets indexed, and where one at query-time may pull out any 
snippet from the XML using XPath. As part of this process I currently invoke xmlParsememory/2 at query-time 
in order to get an xmlDocPtr I can work with. A nice optimization would be to do the parsing at 
indexing-time, and at query-time just read in the binary xmlDocPtr object. Is there a recommended way on how 
to achieve this? Any prior art I could take a look at?

Tried searching the mailing list archives but all I found was a general discussion thread about wbxml, 
nothing very concrete. Any pointers are much appreciated.

Thanks,
Aleksander