Metacat

When morpho or loadxml.html in metacat upload a xml document to metacat, it
allways stores the xml document in a parameter named "doctext". Servelet will
store this parameter name and value (xml documentment itself) into a hashtable.
And xml document will be stored as a String in memory. So if xml document is
big ( huge inline data in eml2 document), it will cause memory problem.

The option we can choose is, using a stream (or reader) connecting client side and servlet
directly, rather than transfer the xml document to a string. Our SAX parser wil
parse the stream.