>we need to query these symbolic names from an exit.

really? care to share why? It is quite unusual to have to "query" a system 
symbol.

The case I usually think of is "I have a string, I support symbolics, I 
call the symbol substitution service to do whatever it, according to its 
documentation, chooses to do".
And if the customer used a symbol that they had failed to define, then 
they get what they get, which is usually something that has bad syntax 
because "&SYM" is not usually what a parser would be looking for.

Peter Relson
z/OS Core Technology Design


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