There can be multiple VarMap entries--each one will act as a variable copy (if it is an existing connection variable), or as a way to copy values from SAML 2.0 Assertions, Connection http query string or connection posted http values.
Syntax:
VarMap=FromName:ToName
The active value described by "FromName" will be copied from one of the active sources to the variable named "ToName" -- the source can be:
•Active Variables
•SAML 2.0 Assertions
•Connection HTTP Query String value
•Connection HTTP Posted value