{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/vineyard/main/json-schema/vineyard-object-schema.json",
  "title": "Vineyard Object",
  "description": "Schema for a Vineyard in-memory object including its ID, type, and location within the distributed cluster",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "The 64-bit unsigned integer ObjectID as a hex string",
      "pattern": "^[0-9a-f]{16}$",
      "example": "0000000700063960"
    },
    "typename": {
      "type": "string",
      "description": "The fully qualified C++ type name of the stored object",
      "examples": [
        "vineyard::Scalar<std::string>",
        "vineyard::Tensor<float64>",
        "vineyard::DataFrame",
        "vineyard::RecordBatch",
        "vineyard::Graph"
      ]
    },
    "nbytes": {
      "type": "integer",
      "minimum": 0,
      "description": "Memory footprint of the object in bytes"
    },
    "isglobal": {
      "type": "boolean",
      "description": "Whether the object is globally persistent and visible across all vineyard instances"
    },
    "islocal": {
      "type": "boolean",
      "description": "Whether the object is local to the connected vineyard instance"
    },
    "instance_id": {
      "type": "integer",
      "description": "The vineyard server instance ID where this object resides"
    },
    "hostname": {
      "type": "string",
      "description": "Hostname of the vineyard server instance holding this object"
    },
    "signature": {
      "type": "string",
      "description": "Object signature for content addressing and deduplication"
    },
    "members": {
      "type": "array",
      "description": "For global objects: list of LocalObject IDs composing this distributed object",
      "items": {
        "type": "string"
      }
    }
  },
  "required": ["id", "typename", "nbytes"]
}