Swagger - XML Element with Attributes + Content Example

swagger-spec.yaml

swagger: "2.0"
info:
  description: "XML Element with Attributes + Content Example"
  title: "Example"
  version: "42"
paths:
  /foo:
    get:
      tags:
        - "foo"
      produces:
        - "application/xml"
      responses:
        "200":
          description: "successful operation"
          schema:
            $ref: "#/definitions/Person"
definitions:
  Person:
    type: "object"
    title: "Person"
    properties:
      content: 
        type: "object"
        example: "foo"
      id:
        type: "string"
        example: "bar"
        xml:
          attribute: true