Schema Validation Error for Example in OpenAPI 3.0.0 Document

[sandeep2rawat]

Description: I'm encountering an issue with Spectral when validating an OpenAPI 3.0.0 document. The error is raised in the example section of a schema definition. The issue seems to be related to the presence of the type: HEADER property within the example, which causes Spectral to throw a validation error. However, when the type property is removed from the example, the validation passes without any errors.

OpenAPI Document: Here's a minimal reproducible example of the OpenAPI document that triggers the issue:

openapi: 3.0.0
info:
  title: ''
  version: '1.0'
paths: {}
components:
  schemas:
    Template:
      type: object
      title: ''
      description: Message Template
      properties:
        components:
          type: array
          items:
            type: object
            properties:
              type:
                type: string
                enum:
                  - HEADER
                  - BODY
                  - BUTTONS
                  - FOOTER
                example: BODY
              text:
                type: string
                example: >-
                  hello {{var_1}}, we have an upcoming mega sale event at {{var_2}},
                  please check attached location
              example:
                type: object
                properties:
                  month:
                    type: string
      example:
        components:
          - text: '{{month}} Sale Offer'
            type: HEADER
            example:
              month: June

Error Message: When running Spectral, I receive the following error:

schema is invalid: data/type must be equal to one of the allowed values, data/type must be array, data/type must match a schema in anyOf

Steps to Reproduce:

1. Create an OpenAPI 3.0.0 document with the schema definition provided above.
2. Run the Spectral linter on the document (Or paste it in stoplight app).
3. Observe the validation error reported by Spectral.

Additional Context:

• The error appears to be associated with the type: HEADER field within the example.
• If the type: HEADER is removed from the example, the validation passes without any errors.

Expected Behavior: The example should be considered valid by Spectral, or the error message should clearly explain why the example is invalid according to the OpenAPI specification.

Environment:

• Spectral version: Using stoplight app
• OpenAPI version: 3.0.0

Attaching the screenshot for reference.

With error Without error (commented type)