Global Variables in CBTA Composite Testcases possible ?

All,

I am building a CBTA Composite testcase, in which one export value of the first test case is used in many other teststeps.

The handover of the output parameter of testcase 1 can be done using local referencing.

However, since the amount usage of the parameter is high, i rather would use an environment context variable.

However, it seems that the scope of the environment context variables is on testcase level, and not on global, Composite Testcase level.

Passing parameters using a custom function would be a possibility as well, storing the data in a file, or a computer environment variable.

Preferably i would like to use Global variables, is that possible ?

Regards,

Arjan