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MUST

MUST define a format for number types

number properties MUST have a format defined (float, double, or decimal).

Invalid Example

requestBody:
    content:
      application/json:
        schema:
          type: object
          properties:
            range:
              type: number

Valid Example

requestBody:
  content:
    application/json:
      schema:
        type: object
        properties:
          range:
            type: number
            format: float

Zalando Guideline 171

Published: 24 January 2025
Last updated: 14 August 2025
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