Post #1
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Alex
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Joined: Jun 15, 2026, 9:20 AM
Posted: Aug 5, 2026, 12:22 PM
People say "your HLQ is TRAIN01" when talking about dataset names. What does HLQ stand for?
Thread: TSO and ISPF
What is a HLQ?
Started by Alex • user2 replies246 viewsLast activity 1 week ago
Post #2
1 votes
Susan
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Joined: Jan 19, 2025, 4:12 PM
Posted: Aug 5, 2026, 1:22 PM
High Level Qualifier. First part of the dataset name. TRAIN01.COBOL.SOURCE → HLQ is TRAIN01.
Security and catalog rules often key off HLQ. You usually only write under your own.
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