XML diff-merge utility that plugs into TortoiseSVN?

I am using TortoiseSVN and Subversion to control versions of XML files
(actually, conforming to the DITA schemas, if this helps anyone). These
files are being opened and worked on by various editors that each have
their own ideas of pretty-printing, tab/space replacement.

While doing a commit recently I idly displayed the diff of a file being
committed and was startled to see that content that would be considered
identical by a conforming XML editor was being treated as a difference by
TortoiseMerge, so that the delta was about the same size as the file
itself!

Can anybody recommend an XML diff/merge utility that plugs into TSVN? It
needs to compare entire elements, ignoring whitespace, and handle
attributes that are out of order but are otherwise identical according to
the XML standards. And if it could perform various levels of compare, so
much the better: just elements and tree structure, ignoring content;
elements and content, ignoring attributes; everything, etc.

Regards,
Hedley

--
Hedley Finger
Training Content Developer and Tools Specialist
MYOB Australia Pty Ltd <http://myob.com/au>
P.O. box 371   Blackburn VIC 3130   Australia
12 Wesley Court   Tally Ho Business Park   East Burwood VIC 3151 Australia
<mailto:hedleyDOTfingerATmyobDOTcom>
Tel. +61 3 9222 9992 x 7421,   Mob. (cell) +61 412 461 558
© MYOB Technology Pty Ltd 2006
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