也就是我打开两个不同版本的xml文件，它能看出什么地方做了修改。xmlspy可以吗，非常感谢。
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Microsoft XML Diff and Patch 1.0
http://www.gotdotnet.com/team/xmltools/xmldiff/
XMLdiff
http://www.logilab.org/xmldiff/
XML Differences
http://tools.decisionsoft.com/xmldiff.html
XML Differencing Tool
http://www.dommitt.com/
DeltaXML
http://www.deltaxml.com/