Priority 1, a value delivered on a wire
The first place a parameter's value can come from is the run itself: a value another node sent down a wire, or a value the launch payload supplied.
The rule
Normative: this is the rule
Rule identifiers are permanent and are never renumbered. Each implementation publishes its own standing against these rules; this specification does not.spec 1.0-draft · CFG-4 · changed in spec 1.0