{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Evidence-backed mining submission",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "task_id",
    "findings",
    "abstention_reason"
  ],
  "properties": {
    "task_id": {
      "type": "string",
      "minLength": 1
    },
    "findings": {
      "type": "array",
      "minItems": 0,
      "maxItems": 5,
      "items": {
        "$ref": "#/$defs/finding"
      }
    },
    "abstention_reason": {
      "type": "string"
    }
  },
  "$defs": {
    "finding": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "finding_id",
        "claim",
        "kind",
        "scope",
        "definitions",
        "assignments",
        "statistics",
        "evidence",
        "limitations"
      ],
      "properties": {
        "population": {
          "type": "object",
          "additionalProperties": false,
          "required": ["filters"],
          "properties": {
            "filters": {
              "type": "array", "maxItems": 3,
              "items": {
                "type": "object", "additionalProperties": false,
                "required": ["field", "op", "value"],
                "properties": {
                  "field": {"type": "string"},
                  "op": {"enum": ["eq", "in", "gte", "lte"]},
                  "value": {"type": ["string", "number", "array"]}
                }
              }
            }
          }
        },
        "comparison": {"type": ["object", "null"]},
        "finding_id": {
          "type": "string",
          "minLength": 1
        },
        "claim": {
          "type": "string",
          "minLength": 1
        },
        "kind": {
          "enum": [
            "group_difference",
            "compound_association",
            "temporal_change"
          ]
        },
        "scope": {
          "type": "string",
          "minLength": 1
        },
        "definitions": {
          "type": "array",
          "minItems": 1,
          "maxItems": 2,
          "items": {
            "type": "object",
            "additionalProperties": false,
            "required": [
              "condition_id",
              "inclusion",
              "exclusion"
            ],
            "properties": {
              "condition_id": {
                "type": "string",
                "minLength": 1
              },
              "inclusion": {
                "type": "string",
                "minLength": 1
              },
              "exclusion": {
                "type": "string",
                "minLength": 1
              }
            }
          }
        },
        "assignments": {
          "type": "array",
          "minItems": 1,
          "maxItems": 2,
          "items": {
            "type": "object",
            "additionalProperties": false,
            "required": [
              "condition_id",
              "positive_doc_ids",
              "negative_doc_ids",
              "unknown_doc_ids"
            ],
            "properties": {
              "condition_id": {
                "type": "string",
                "minLength": 1
              },
              "positive_doc_ids": {
                "type": "array",
                "uniqueItems": true,
                "items": {
                  "type": "string",
                  "minLength": 1
                }
              },
              "negative_doc_ids": {
                "type": "array",
                "uniqueItems": true,
                "items": {
                  "type": "string",
                  "minLength": 1
                }
              },
              "unknown_doc_ids": {
                "type": "array",
                "uniqueItems": true,
                "items": {
                  "type": "string",
                  "minLength": 1
                }
              }
            }
          }
        },
        "statistics": {
          "type": "object",
          "additionalProperties": {
            "type": [
              "number",
              "null"
            ]
          }
        },
        "evidence": {
          "type": "array",
          "minItems": 1,
          "items": {
            "type": "object",
            "additionalProperties": false,
            "required": [
              "doc_id",
              "start",
              "end",
              "quote",
              "role"
            ],
            "properties": {
              "doc_id": {
                "type": "string",
                "minLength": 1
              },
              "start": {
                "type": "integer",
                "minimum": 0
              },
              "end": {
                "type": "integer",
                "minimum": 1
              },
              "quote": {
                "type": "string",
                "minLength": 1
              },
              "role": {
                "enum": [
                  "supporting",
                  "counterexample",
                  "context"
                ]
              }
            }
          }
        },
        "limitations": {
          "type": "array",
          "uniqueItems": true,
          "items": {
            "type": "string",
            "minLength": 1
          },
          "minItems": 1
        }
      }
    }
  },
  "description": "Evidence-backed findings. Full document partitions, exact quotations and arithmetic are checked by the evaluator."
}