openapi: "3.1.0"
info:
  description: Sample API definition with one problem in two instances
  version: 1.0.0
  title: Character Supply
  license:
    name: MIT
    url: "http://www.apache.org/licenses/LICENSE-2.0.html"
  contact:
    email: "apiteam@swagger.io"
servers:
  - url: http://chars.swagger.io/v1
tags:
  - name: letters
    description: A letter
  - name: special_characters
    description: A special character
paths:
  /letters:
    get:
      summary: List all letters
      description: List all letters
      operationId: list_letters
      tags:
        - letters
      parameters:
        - name: limit
          in: query
          description: How many items to return at one time (max 100)
          required: false
          schema:
            type: integer
            format: int32
            default: 10
            minimum: 1
            maximum: 100
        - name: offset
          in: query
          description: Offset of first element to return in results.
          required: false
          schema:
            type: integer
            format: int32
            minimum: 0
            maximum: 1024000
      responses:
        '200':
          $ref: "#/components/responses/StringsResponse"
        default:
          description: unexpected error
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Error"
  /special_characters:
    get:
      summary: List all special characters
      description: List all special characters
      operationId: list_special_characters
      tags:
        - special_characters
      parameters:
        - name: limit
          in: query
          description: How many items to return at one time (max 100)
          required: false
          schema:
            type: integer
            format: int32
            default: 10
            minimum: 1
            maximum: 100
        - name: offset
          in: query
          description: Offset of first element to return in results.
          required: false
          schema:
            type: integer
            format: int32
            minimum: 0
            maximum: 1024000
      responses:
        '200':
          $ref: "#/components/responses/StringsResponse"
        default:
          description: unexpected error
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Error"
components:
  responses:
    StringsResponse:
      description: not very good
      content:
        application/json:
          schema:
            $ref: "#/components/schemas/ListOfCharacters"
  schemas:
    ListOfCharacters:
      description: object holding a list of strings
      type: object
      required:
        - chars
        - limit
        - offset
      properties:
        chars:
          type: array
          minItems: 0
          maxItems: 200
          description: all the characters
          items:
            type: string
        limit:
          type: integer
          format: int32
          minimum: 1
          maximum: 100
          description: for pagination
        offset:
          type: integer
          format: int32
          minimum: 0
          maximum: 1024000
          description: for pagination
      example:
        chars:
          - a
          - b
          - c
        limit: 100
        offset: 10
    Error:
      description:
        An error in processing a service request
      required:
        - code
        - message
      properties:
        code:
          type: integer
          format: int32
          minimum: 0
          maximum: 599
          description: "code property"
        message:
          type: string
          description: "message property"
          pattern: '^[a-zA-Z0-9_ ]*$'
          minLength: 1
          maxLength: 300
      example:
        code: 123
        message: "error occurred"