Actually I found the answer my self, it can happen with 2 queries, the first one to perform the filter (for each) and the second one just a normal if statement with the count command to make sure the count of the similar elements is 0

 Hi

 

 I am modifying an xslt manually (for InfoPath), and I am trying to figure out how to do the following:

 

 I have a document with 2 lists of nodes, List A and List B, both have the same structure, and both have a node that is used as a key

 List1

 k = 1

 a = "abc"

 b = "abc"

 

 k = 2

 a = "cxd"

 b = "cxd"

 

 List 2

 k = 1

 a = "abc"

 b = "abc"

 

 k = 3

 a = "cfg"

 b = "cfg"

 

 

 how can I say in xpath, get me all the nodes in list 2 that are not in list 1 using k as key

 

 Thanks