{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/tkcl-research/LogicBench1k/schema/annotation.schema.json",
  "title": "LogicBench-1K Annotation",
  "description": "Ground-truth directed graph for a single digital logic circuit diagram.",
  "type": "object",
  "additionalProperties": false,
  "required": ["nodes", "edges", "image_path"],
  "properties": {
    "nodes": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["id", "type"],
        "properties": {
          "id": {
            "type": "string",
            "pattern": "^gate_[0-9]+$"
          },
          "type": {
            "type": "string",
            "enum": ["AND", "OR", "NOT", "NAND", "NOR", "XOR", "XNOR"]
          }
        }
      }
    },
    "edges": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["source", "target"],
        "properties": {
          "source": {
            "type": "string",
            "pattern": "^gate_[0-9]+$"
          },
          "target": {
            "type": "string",
            "pattern": "^gate_[0-9]+$"
          }
        }
      }
    },
    "image_path": {
      "type": "string",
      "pattern": "^images/lb1k_[0-9]{5}\\.jpg$"
    }
  }
}