[xsl] Selecting content via attribute presence.

[Ben Trafford <ben@xxxxxxxxxxx>]

	Hi!

	I've got a document that has a RevisionID IDREF implied on every 
element. It may or may not be present. -If- it's present, it has a 
corresponding ID on an item in a RevisionList at the end of the document.

	What I want my stylesheet to do is check for the existence of the 
RevisionID on each element, and if it finds it, insert the value of 
the element content with the corresponding ID found at the end of the 
document. And I know I could do this with an xsl:if statement on 
every element, but there's got to be a better way to do it.

	Advice would be appreciated!

	(And yes, for those who are curious, I'm trying to basically enable 
change-tracking via stylesheets. It's pretty cool!)

--->Ben