formats:
  - oas3
rules:
  ens-paris-info-title:
    description: API must declare an info.title.
    severity: error
    given: $.info
    then:
      field: title
      function: truthy
  ens-paris-info-version:
    description: API must declare an info.version (the MESR Explore API uses values like 'v2.1').
    severity: error
    given: $.info
    then:
      field: version
      function: truthy
  ens-paris-server-defined:
    description: At least one server URL must be defined.
    severity: error
    given: $.servers
    then:
      function: length
      functionOptions:
        min: 1
  ens-paris-server-https:
    description: Server URLs must use HTTPS, as the MESR Explore API does.
    severity: error
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: "^https://"
  ens-paris-catalog-paths:
    description: All Explore API paths are read-only catalog routes rooted at /catalog.
    severity: warn
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        match: "^/catalog"
  ens-paris-get-only:
    description: The Explore API exposes read-only data; only GET operations are expected.
    severity: warn
    given: $.paths[*][?(@property != 'get' && @property != 'parameters' && @property != 'summary' && @property != 'description')]~
    then:
      function: falsy
  ens-paris-operation-summary:
    description: Every operation should carry a summary describing the query.
    severity: warn
    given: $.paths[*][get,post]
    then:
      field: summary
      function: truthy
  ens-paris-records-pagination:
    description: Record/dataset list endpoints should support limit and offset pagination parameters.
    severity: info
    given: $.components.parameters
    then:
      - field: limit
        function: truthy
      - field: offset
        function: truthy