how to deal with maps in BPEL

Question

I have a map structure for example like this :

"A" : "C:\Documents\file1.txt"
"B" : "C:\Documents\ProjectFiles\file2.txt"
"E" : "D:\Input\file3.txt"
:
:
where A, B and E .... are identifiers and I want to get special parts of this structure to invoke different web-services with different inputs from this map

Answer 1

The solution was like what @joergl stated in the comments above : " For instance, an expression that selects the file path for B for the sample in your comment is: /filesequence/file[child::ID="B"]/path"