[bdbxml] collections

I have beem using eXist to investigate using an XML DB and I am now looking for
a more robust implmentation. I have tried to use the latest release of Oracle
that supports XQuery but it crashes when I try to run my query. This either
means that the Oracle XQuery support is not very good or the query that I am
doing is somehow problematic.

I have a large number of very small (500 bytes) documents organized in a
hierarchy of collections (at least that is what they are called in eXist) so the
actual xml files are /x/y/foo.xml /x/y/foo2.xml /x/z/foo3.xml.

In my query I need to be able to have something like "for $i in collection(/x)"
and have the query go across all 3 of the files or "for $i in collection(/x/y)"
and have it look at the 2 files. Either of these work fine in eXist (if a little
slowly) but the first doesn't work at all in Oracle and the second results in an
internal error maximum open cursors exceeded (there are several hundred xml
files in the collection when this happens). 

My question is can I do this easily with Berkeley DB XML? Is it possible to make
it perform?

thanks
Jim




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