description: Mapping of Workflow step inputs to nested CWL tool definitions inputs
  or outputs.
items:
  oneOf:
  - $ref: https://ogcincubator.github.io/bblocks-cwl/build/annotated/cwl/v1_2_1/CWLIdentifier/schema.yaml
  - $ref: https://ogcincubator.github.io/bblocks-cwl/build/annotated/cwl/v1_2_1/CWLWorkflowStepId/schema.yaml
type: array