XSL key using multiple values...

XSLT 1.0 Grouping Key for different Nodes and Elements...

Using xsl:key to find an attribute from a matched child...

Name of iteration variable in xsl:for-each on xsl:key in XSLT 1.0...

Using two elements for xsl:key key...

Counting distinct items in XSLT and listing only once...

Finding Specific Descendant Nodes With XSL:Key...