piecewise parsing

Hello,

I understand that expat can do piece-wise parsing with different parts of an 
XML document but I can't seem to get it to work. I read XML data from a 
socket using HTTP and the moment I can a response I call XML_Parse() with 
the data and the size of data received. This part of the document is parsed 
successfully but if I call XML_Parse() once more on the next part received 
from the socket (which definitely has a part of it attached to the first 
part), parsing fails... Am I missing something? Should I call some other 
function to make expat aware of my usage of piece-wise parsing? Please 
advise. Thank you.

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