{
  "type": "object",
  "properties": {
    "record_id": {
      "type": "string"
    },
    "product": {
      "const": "ranking"
    },
    "thread": {
      "type": "object",
      "properties": {
        "thread_id": {
          "type": "string",
          "pattern": "^(stats|scicomp|biology):[0-9]+$"
        },
        "source_site": {
          "enum": [
            "stats",
            "scicomp",
            "biology"
          ]
        },
        "title": {
          "type": "string",
          "minLength": 1
        },
        "question_text": {
          "type": "string",
          "minLength": 20
        },
        "question_html": {
          "type": "string"
        },
        "question_author": {
          "type": "string"
        },
        "question_author_url": {
          "type": [
            "string",
            "null"
          ]
        },
        "question_author_user_type": {
          "type": "string"
        },
        "question_created_at": {
          "type": "string"
        },
        "question_score": {
          "type": "integer"
        },
        "tags": {
          "type": "array",
          "minItems": 1,
          "uniqueItems": true,
          "items": {
            "type": "string"
          }
        },
        "question_license": {
          "enum": [
            "CC BY-SA 2.5",
            "CC BY-SA 3.0",
            "CC BY-SA 4.0"
          ]
        },
        "accepted_answer_id": {
          "type": [
            "integer",
            "null"
          ]
        },
        "answers": {
          "type": "array",
          "minItems": 1,
          "items": {
            "type": "object",
            "properties": {
              "answer_id": {
                "type": "integer"
              },
              "question_id": {
                "type": "integer"
              },
              "answer_text": {
                "type": "string",
                "minLength": 20
              },
              "answer_html": {
                "type": "string"
              },
              "created_at": {
                "type": "string"
              },
              "updated_at": {
                "type": "string"
              },
              "score": {
                "type": "integer"
              },
              "is_accepted": {
                "type": "boolean"
              },
              "content_license": {
                "enum": [
                  "CC BY-SA 2.5",
                  "CC BY-SA 3.0",
                  "CC BY-SA 4.0"
                ]
              },
              "answer_url": {
                "type": "string"
              },
              "provenance": {
                "type": "object",
                "properties": {
                  "source_api": {
                    "type": "string"
                  },
                  "source_url": {
                    "type": "string"
                  },
                  "collected_at": {
                    "type": "string"
                  },
                  "raw_file": {
                    "type": "string"
                  },
                  "raw_sha256": {
                    "type": "string",
                    "pattern": "^[a-f0-9]{64}$"
                  },
                  "license": {
                    "enum": [
                      "CC BY-SA 2.5",
                      "CC BY-SA 3.0",
                      "CC BY-SA 4.0"
                    ]
                  },
                  "license_url": {
                    "type": "string"
                  },
                  "attribution_required": {
                    "const": true
                  },
                  "transformation": {
                    "type": "string"
                  }
                },
                "required": [
                  "source_api",
                  "source_url",
                  "collected_at",
                  "raw_file",
                  "raw_sha256",
                  "license",
                  "license_url",
                  "attribution_required",
                  "transformation"
                ],
                "additionalProperties": false
              },
              "revision_attribution": {
                "type": "array",
                "minItems": 1,
                "items": {
                  "type": "object",
                  "properties": {
                    "revision_guid": {
                      "type": "string"
                    },
                    "revision_number": {
                      "type": [
                        "integer",
                        "null"
                      ]
                    },
                    "revision_type": {
                      "type": "string"
                    },
                    "created_at": {
                      "type": "string"
                    },
                    "content_license": {
                      "anyOf": [
                        {
                          "enum": [
                            "CC BY-SA 2.5",
                            "CC BY-SA 3.0",
                            "CC BY-SA 4.0"
                          ]
                        },
                        {
                          "type": "null"
                        }
                      ]
                    },
                    "contributor": {
                      "type": "object",
                      "properties": {
                        "display_name": {
                          "type": "string"
                        },
                        "profile_url": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "user_type": {
                          "type": "string"
                        }
                      },
                      "required": [
                        "display_name",
                        "profile_url",
                        "user_type"
                      ],
                      "additionalProperties": false
                    },
                    "revision_url": {
                      "type": "string"
                    },
                    "raw_file": {
                      "type": "string"
                    },
                    "raw_sha256": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "revision_guid",
                    "revision_number",
                    "revision_type",
                    "created_at",
                    "content_license",
                    "contributor",
                    "revision_url",
                    "raw_file",
                    "raw_sha256"
                  ],
                  "additionalProperties": false
                }
              },
              "author": {
                "type": "string"
              },
              "author_url": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "author_user_type": {
                "type": "string"
              }
            },
            "required": [
              "answer_id",
              "question_id",
              "answer_text",
              "answer_html",
              "created_at",
              "updated_at",
              "score",
              "is_accepted",
              "content_license",
              "answer_url",
              "provenance",
              "revision_attribution",
              "author",
              "author_url",
              "author_user_type"
            ],
            "additionalProperties": false
          }
        },
        "provenance": {
          "type": "object",
          "properties": {
            "source_api": {
              "type": "string"
            },
            "source_url": {
              "type": "string"
            },
            "collected_at": {
              "type": "string"
            },
            "raw_file": {
              "type": "string"
            },
            "raw_sha256": {
              "type": "string",
              "pattern": "^[a-f0-9]{64}$"
            },
            "license": {
              "enum": [
                "CC BY-SA 2.5",
                "CC BY-SA 3.0",
                "CC BY-SA 4.0"
              ]
            },
            "license_url": {
              "type": "string"
            },
            "attribution_required": {
              "const": true
            },
            "transformation": {
              "type": "string"
            }
          },
          "required": [
            "source_api",
            "source_url",
            "collected_at",
            "raw_file",
            "raw_sha256",
            "license",
            "license_url",
            "attribution_required",
            "transformation"
          ],
          "additionalProperties": false
        },
        "revision_attribution": {
          "type": "array",
          "minItems": 1,
          "items": {
            "type": "object",
            "properties": {
              "revision_guid": {
                "type": "string"
              },
              "revision_number": {
                "type": [
                  "integer",
                  "null"
                ]
              },
              "revision_type": {
                "type": "string"
              },
              "created_at": {
                "type": "string"
              },
              "content_license": {
                "anyOf": [
                  {
                    "enum": [
                      "CC BY-SA 2.5",
                      "CC BY-SA 3.0",
                      "CC BY-SA 4.0"
                    ]
                  },
                  {
                    "type": "null"
                  }
                ]
              },
              "contributor": {
                "type": "object",
                "properties": {
                  "display_name": {
                    "type": "string"
                  },
                  "profile_url": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "user_type": {
                    "type": "string"
                  }
                },
                "required": [
                  "display_name",
                  "profile_url",
                  "user_type"
                ],
                "additionalProperties": false
              },
              "revision_url": {
                "type": "string"
              },
              "raw_file": {
                "type": "string"
              },
              "raw_sha256": {
                "type": "string"
              }
            },
            "required": [
              "revision_guid",
              "revision_number",
              "revision_type",
              "created_at",
              "content_license",
              "contributor",
              "revision_url",
              "raw_file",
              "raw_sha256"
            ],
            "additionalProperties": false
          }
        },
        "medical_sensitive": {
          "type": "boolean"
        },
        "patient_specific": {
          "const": false
        },
        "split_group": {
          "type": "string"
        },
        "split": {
          "enum": [
            "train",
            "validation",
            "test",
            "holdout"
          ]
        },
        "question_id": {
          "type": "integer"
        },
        "domain": {
          "enum": [
            "statistics",
            "computational_science",
            "biology"
          ]
        },
        "source_url": {
          "type": "string"
        },
        "external_links": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "uniqueItems": true
        }
      },
      "required": [
        "thread_id",
        "source_site",
        "title",
        "question_text",
        "question_html",
        "question_author",
        "question_author_url",
        "question_author_user_type",
        "question_created_at",
        "question_score",
        "tags",
        "question_license",
        "accepted_answer_id",
        "answers",
        "provenance",
        "revision_attribution",
        "medical_sensitive",
        "patient_specific",
        "split_group",
        "split",
        "question_id",
        "domain",
        "source_url",
        "external_links"
      ],
      "additionalProperties": false
    },
    "split": {
      "enum": [
        "train",
        "validation",
        "test",
        "holdout"
      ]
    },
    "question": {
      "type": "string"
    },
    "candidate_answers": {
      "type": "array",
      "minItems": 2,
      "items": {
        "type": "object",
        "properties": {
          "answer_id": {
            "type": "integer"
          },
          "question_id": {
            "type": "integer"
          },
          "answer_text": {
            "type": "string",
            "minLength": 20
          },
          "answer_html": {
            "type": "string"
          },
          "created_at": {
            "type": "string"
          },
          "updated_at": {
            "type": "string"
          },
          "score": {
            "type": "integer"
          },
          "is_accepted": {
            "type": "boolean"
          },
          "content_license": {
            "enum": [
              "CC BY-SA 2.5",
              "CC BY-SA 3.0",
              "CC BY-SA 4.0"
            ]
          },
          "answer_url": {
            "type": "string"
          },
          "provenance": {
            "type": "object",
            "properties": {
              "source_api": {
                "type": "string"
              },
              "source_url": {
                "type": "string"
              },
              "collected_at": {
                "type": "string"
              },
              "raw_file": {
                "type": "string"
              },
              "raw_sha256": {
                "type": "string",
                "pattern": "^[a-f0-9]{64}$"
              },
              "license": {
                "enum": [
                  "CC BY-SA 2.5",
                  "CC BY-SA 3.0",
                  "CC BY-SA 4.0"
                ]
              },
              "license_url": {
                "type": "string"
              },
              "attribution_required": {
                "const": true
              },
              "transformation": {
                "type": "string"
              }
            },
            "required": [
              "source_api",
              "source_url",
              "collected_at",
              "raw_file",
              "raw_sha256",
              "license",
              "license_url",
              "attribution_required",
              "transformation"
            ],
            "additionalProperties": false
          },
          "revision_attribution": {
            "type": "array",
            "minItems": 1,
            "items": {
              "type": "object",
              "properties": {
                "revision_guid": {
                  "type": "string"
                },
                "revision_number": {
                  "type": [
                    "integer",
                    "null"
                  ]
                },
                "revision_type": {
                  "type": "string"
                },
                "created_at": {
                  "type": "string"
                },
                "content_license": {
                  "anyOf": [
                    {
                      "enum": [
                        "CC BY-SA 2.5",
                        "CC BY-SA 3.0",
                        "CC BY-SA 4.0"
                      ]
                    },
                    {
                      "type": "null"
                    }
                  ]
                },
                "contributor": {
                  "type": "object",
                  "properties": {
                    "display_name": {
                      "type": "string"
                    },
                    "profile_url": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "user_type": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "display_name",
                    "profile_url",
                    "user_type"
                  ],
                  "additionalProperties": false
                },
                "revision_url": {
                  "type": "string"
                },
                "raw_file": {
                  "type": "string"
                },
                "raw_sha256": {
                  "type": "string"
                }
              },
              "required": [
                "revision_guid",
                "revision_number",
                "revision_type",
                "created_at",
                "content_license",
                "contributor",
                "revision_url",
                "raw_file",
                "raw_sha256"
              ],
              "additionalProperties": false
            }
          },
          "author": {
            "type": "string"
          },
          "author_url": {
            "type": [
              "string",
              "null"
            ]
          },
          "author_user_type": {
            "type": "string"
          }
        },
        "required": [
          "answer_id",
          "question_id",
          "answer_text",
          "answer_html",
          "created_at",
          "updated_at",
          "score",
          "is_accepted",
          "content_license",
          "answer_url",
          "provenance",
          "revision_attribution",
          "author",
          "author_url",
          "author_user_type"
        ],
        "additionalProperties": false
      }
    },
    "scores": {
      "type": "array",
      "items": {
        "type": "integer"
      }
    },
    "accepted_status": {
      "type": "array",
      "items": {
        "type": "boolean"
      }
    },
    "ground_truth": {
      "const": "community signals only; no scientific truth label"
    }
  },
  "required": [
    "record_id",
    "product",
    "thread",
    "split",
    "question",
    "candidate_answers",
    "scores",
    "accepted_status",
    "ground_truth"
  ],
  "additionalProperties": false,
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}