Select all elements that does not exist in another node with XSLT

[DarkDay]

I want to select all elements that does not exist in another node.\[code\]<root> <users> <array> <name>John</name> <age>30</age> </array> <array> <name>Joe</name> <age>30</age> </array> <array> <name>Lou</name> <age>30</age> </array> </users> <selected_users> <name>Joe</name> <age>30</age> </selected_users></root>\[/code\]So what I want from this list is John and Lou since their not listed under the selected users node..