openapi: 3.0.0
info:
  description: Test API
  version: v1
  title: Test API
tags:
  - name: Test
    description: Test API
servers:
  - url: /v1
paths:
  /test:
    post:
      tags:
        - Test
      summary: Test endpoint
      description: Test
      operationId: postTest
      responses:
        '200':
          description: Returns response
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/test'
components:
  schemas:
    test:
      type: object
      properties:
        a:
          type: string
        b:
          type: integer
        c:
          type: array
          items:
            $ref: '#/components/schemas/Things'
        d:
          type: array
          items:
            anyOf:
              - $ref: '#/components/schemas/TextObject'
              - $ref: '#/components/schemas/ImageObject'


    Things:
      type: object
      oneOf:
        - $ref: '#/components/schemas/TextObject'
        - $ref: '#/components/schemas/ImageObject'

    TextObject:
      required:
        - data
      type: object
      properties:
        objectType:
          type: string
          example: Text
          xml:
            name: ObjectType
        data:
          type: string
          example: This is a text
          xml:
            name: Data
      description: Contains a text

    ImageObject:
      required:
        - data
      type: object
      properties:
        objectType:
          type: string
          example: image
          xml:
            name: ObjectType
        data:
          type: string
          example: This is a image
          xml:
            name: Data
      description: Contains a image