The passing of user selections

[CarollaT@xxxxxxxxxxxxxx]

I trust everyone had a Merry Christmas, a Feliz Navidad, and all that good
stuff.  If not, I wish you one (albeit belated...)

I am building an RPGIV program to replace an NGS Query.  

The user is allowed to make several selections that involve lists of values
(sites, contract IDs, etc.), and then the report is to be submitted to
batch.  The added requirement is that the job might be submitted multiple
times while the batch component is in the job queue from other runs.  

I am trying to determine the best way to pass the selections to the batch
submission.  Should I use a USER SPACE, or a DATA QUEUE, or a uniquely named
file with the selections (different field sizes, types)?  

I have pondered a monstrous, structured parameter string, but I have heard
such things are resource intensive.  

How would you do it?
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Tony Carolla
MedAmerica Billing Services, Inc.