How can I select nodes from a tree whose markup is stored in a variable?

Question

Consider the following XSLT script:

Answer 1

A posting by M. David Peterson just taught me how to make this work:

It's not necessary to have an for this case. Instead, I can embed the data document directly into the XSL stylesheet (putting it into a namespace for sanity) and then select elements from that. Here's the result:

redrot
greengruen
blueblau




    

This generates the expected output redgreenblue.

The trick is to use document('') to get a handle to the XSLT document itself, then * to get into the toplevel xsl:stylesheet element and from there I can access the color map.