Enterprise Server for .NET provides an emulation of IBM's TSO/E REXX language. See the z/OS TSO/E REXX Reference and z/OS TSO/E REXX User's Guide for more details about the language.
REXX EXECs can be run under JCL using either the IKJEFT01 or IRXJCL utilities.
CLISTs are not supported under Enterprise Server for .NET, so we recommend that you convert any CLISTs you have to REXX EXECs.