RE: Getting unique items from elements

> The output as you would expect includes the category of 
> "Children" twice. Is there a way in XSL to extract only the 
> unique elements from <category>?

This problem is known as "grouping": you'll find it in the index of any XSLT
book under that name, or at http://www.jenitennison.com/xslt/grouping. It's
easy in XSLT 2.0 using <xsl:for-each-group>, but a little tricky in XSLT
1.0.

Michael Kay
http://www.saxonica.com/