1. What code wrapper actually does?

The code wrapper intermediates between Kepler actor and user code:

• Passes variables of language built-in types (int, char, etc) from actor to the code
• Reads IDS(es) from UAL and passes data to user code
• Passes input code parameters (XML/XSD files) to user code
• Calls user subroutine/function
• Saves output IDS(es)