JES symbol options (JSYMLVL)

The JSYMLVL field specifies the following JES symbol options:

Field Name: Description
JSYMLVLT: Access symbols at the task level.
JSYMLVLJ: Access symbols at the job step level.
JSYMLVNJ: Do not access JCL symbols. This option only applies to an EXTRACT request. If this option is not selected, an EXTRACT request will continue looking for the requested symbol or symbols among the exported JCL symbols. When accessing JCL symbols, the caller must be in task mode and cannot be holding any locks.
JSYMLVUD: Allow a CREATE request to update a symbol value if the symbol already exists at the specified level. If this option is not specified, the duplicate symbol will not be changed and a duplicate symbol warning will be returned.
JSYMLVJC: Check JCL constraints.