A declared input delivers to the port its entry binds
The manifest is a mapping, and this is the mapping it performs.
The rule
Normative: this is the rule
A value supplied under a declared input name is delivered to the workflow's initial data under the node identifier and port name that input's manifest entry binds.
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 · MAN-11 · changed in spec 1.0