Validation checks for duplicate ids

[tetron]

Validation should include a check that identifiers are not duplicated in a document.

[mr-c]

Is this a "nice to have", or something we say in the spec?

[tetron]

I'm pretty sure this needs to be part of the spec. The document only has one namespace of identifiers.

[tetron]

Examples. These should fail validation by schema salad. Currently the 1st case eventually fails in cwltool (it should be caught earlier) the 2nd case doesn't get caught at all.

cwlVersion: v1.0
class: CommandLineTool
baseCommand: echo
inputs:
  - id: example_flag
    type: boolean
    inputBinding:
      position: 1
      prefix: -f
  - id: example_flag
    type: int
    inputBinding:
      position: 3
      prefix: --example-string

outputs: []

and

cwlVersion: v1.0
class: Workflow
inputs:
  example_flag:
    type: boolean
    inputBinding:
      position: 1
      prefix: -f

outputs: []

steps:
  example_flag:
    in: []
    out: []
    run: dup_id1.cwl

[kapilkd13]

I think we can close this issue.