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One-Liner: Case-Insensitive XML Queries

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I'm a one-trick pony with XML.  I use $xml.SelectNodes("//name[@attribute='value']") and permutations thereof.  However, XML's SelectNodes() and SelectSingleNode() methods are case-sensitive. 

My coworker Keith Munson found this tidbit:

 $xml.SelectNodes("//element[translate(@AttributeName, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz') ='AttributeValue']")

This will return

<element AttributeName="attributevalue" />

as well as

<element AttributeName="AttributeValue" />

But it won't work for

<Element AttributeName="AttributeValue" />

nor:

<element attributename="AttributeValue" />

Oh, well, it's a start.