- CSL
- A 3-bit field (CMPSCDICT_UE_COMPSYMLEN) indicating the number of characters contained in CMPSCDICT_UE_CHARS. These characters will be placed at offset 0 in the expanded output. This field should not have a value of 0.
- EC
- Expansion character. The 7-character field (CMPSCDICT_UE_CHARS) is provided to contain the expansion characters.