{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://fablepool.org/schemas/fpcf/v1/body.claim-assert.schema.json",
  "title": "Body: claim-assert",
  "type": "object",
  "required": ["subject", "predicate", "object", "confidence", "basis", "method"],
  "additionalProperties": false,
  "properties": {
    "subject": {
      "$ref": "defs.schema.json#/$defs/nonEmptyString",
      "description": "Entity the claim is about; the log owner is fp:self."
    },
    "predicate": {
      "$ref": "defs.schema.json#/$defs/nonEmptyString",
      "description": "Namespaced predicate, e.g. schedule.weekly_commitment."
    },
    "object": { "$ref": "defs.schema.json#/$defs/claimObject" },
    "confidence": { "$ref": "defs.schema.json#/$defs/confidence" },
    "basis": {
      "type": "array",
      "items": { "$ref": "defs.schema.json#/$defs/opId" },
      "uniqueItems": true,
      "maxItems": 256,
      "description": "Derivation-graph edges: the evidence-ingest, claim-assert, or correction operations this claim is derived from. May be empty for direct user assertions."
    },
    "method": {
      "$ref": "defs.schema.json#/$defs/nonEmptyString",
      "description": "Derivation method identifier, e.g. rule:recurring-event/v1 or user:manual."
    }
  }
}