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PSOPREF

Specifies the high‑level qualifier used by the PSO interface when allocating temporary data sets. This value is also used by PDSE program library transfers when creating temporary data sets.

XCOMPSO

Specifies the high‑level qualifier XCOMPSO.

Up to 20 alphanumeric characters

Specifies a high‑level qualifier other than XCOMPSO. The high‑level qualifier can contain up to 20 alphanumeric characters. You can specify multiple high-level qualifiers, up to 20 characters. The prefix must follow MVS naming conventions.

Default: XCOMPSO