XPath to structure information description


In XML filters, you can set the description of structure information to be populated dynamically from a relative XPath. So far I'm having limited success with this, though.

This is my (simplified sample) XML:

      <Name SID="XYZ">translatable text</Name>

What I manage to do is fetch the SID with this XPath:


What I'm trying to do is fetch the Number. I have tried this two ways:


But neither seems to work. So the question is, does the description have to be an attribute value of the translatable element itself, or is there a different approach to getting the description from another relative element?

Any pointers are much appreciated! Thanks!