XPath - case-insensitive test for text node value

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Hi,

I would really appreciate if someone can tell me how to do something similar in webMethods Developer:

%/input/someElement% = ‘true’

%/input/someElement% = ‘True’

I want to match the value of text node: “someElement” to all variations of “true” like in Saxon - I could change all this to upper case – using this function fn:upper-case(). Like: [url]http://www.saxonica.com/documentation/functions/intro/fn_upper-case.html[/url]

is there any function that I can call in webMethods Developer ?

Thanks for the help.