This is more of XML'y rather than Perl'y question but perhaps it is common knowledge here...
Assume that I have XML file that describes physical configuration - for the sake of argument letsay it is about 
Item      (that has TYPE and some internal ID)
Container (that has TYPE and some internal ID)

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So XML file describes collection of items sitting in containers.
So now I have two files - each one describes some collection of items of some TYPE sitting in container of certain TYPE.

How can I verify that those two files describe same physical configuration?

Is it a common XML problem and there is some module somewhere that can be helpful in developing script to compare two configuration?
TIA for any pointers, keywords etc...
PS. My real life problem deals with configuration that has much more depth than mere items and containers.
PS2."internal ID" has no relevance outside of given file - but inside the file it may be used to describe to refer to element as part of some construct (eg some other relation beyond containment).

In reply to comparing XML files by woland99

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