{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://assetoverflow.dev/core/schemas/frame",
  "title": "CORE Frame Record",
  "description": "A predicate frame template. Frames define the argument structure of predicates — what roles are required, optional, or forbidden.",
  "type": "object",
  "required": ["frame_id", "language", "predicate_type", "slots"],
  "properties": {
    "frame_id": {
      "type": "string",
      "description": "Stable unique identifier. Convention: {lang}:{predicate-name} e.g. 'he:copular-basic'."
    },
    "language": {
      "type": "string",
      "enum": ["en", "he", "el"]
    },
    "predicate_type": {
      "type": "string",
      "description": "Class of predicate. Examples: 'copular', 'transitive', 'ditransitive', 'intransitive', 'causative', 'stative'."
    },
    "slots": {
      "type": "array",
      "description": "Ordered list of argument slots in this frame.",
      "items": {
        "type": "object",
        "required": ["name", "required"],
        "properties": {
          "name": {"type": "string"},
          "required": {"type": "boolean"},
          "semantic_role": {"type": "string"},
          "constraints": {"type": "array", "items": {"type": "string"}}
        },
        "additionalProperties": false
      }
    },
    "constraints": {
      "type": "array",
      "items": {"type": "string"},
      "description": "Frame-level constraints that apply regardless of slot. E.g. 'agreement-required', 'no-passive'."
    },
    "field_target": {
      "type": ["string", "null"],
      "description": "The shared CORE field primitive this frame maps to when activated."
    }
  },
  "additionalProperties": false
}