[xslt] How do I share dicts?

[David Hyatt <hyatt apple com>]

Someone suggested that I use a global dictionary and share it across 
all the stylesheets in a particular document as I parse the xmlDocPtrs, 
since I'll be parsing these documents asynchronously as I get data and 
therefore can't actually use the dict that the new docloader API is 
passing to the docloader callback.

How do I actually go about doing that?  I'm currently using 
xmlReadMemory, which doesn't appear to take a context or a dict at all. 
 Is there some other function I need to use to parse?

Thanks!
dave
(hyatt apple com)