In this post:
   Methods in the helper class
   Notes on implementation
   Installation Instructions
   Problems with the Script Functoid
   Examples of Usage
   Download the code
   Testing the sample map

I’m not sure if this is actually of any use to anyone but if
you do want to use Microsoft’s
Extended XPath Functions from a BizTalk Map (see my previous post) then
I’ve created a wrapper assembly to do this for you.
Method names are the same as the original functions, but
using "_" instead of "-".