Parameter Sets

Parameter sets are named collections of typed parameters stored as project-level assets. They let you define values once and reuse them across multiple flows — switching between environments (dev, test, prod) at job runtime without modifying the flow.

Always Determine Flow Type First

Before discussing parameter types, value sets, PROJDEF, local parameters, or reference syntax — determine whether the target flow is:

• DataStage (batch) — supports all 11 parameter types, value sets, PROJDEF, local parameters
• StreamSets (streaming) — supports string parameters only; no value sets, no PROJDEF

Most parameter-set features are engine-specific. Getting this wrong leads to silent failures. → See resources/streaming_limitations.md for the full constraints and validation checklist.

What Feature Do You Need?