{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "schema://yams/graphjson_v1",
  "title": "GraphJSON v1 — YAMS canonical property-graph format",
  "type": "object",
  "properties": {
    "id": { "type": "string" },
    "name": { "type": "string" },
    "directed": { "type": "boolean" },
    "nodes": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "id": { "type": "string" },
          "labels": {
            "type": "array",
            "items": { "type": "string" },
            "default": []
          },
          "properties": {
            "type": "object",
            "additionalProperties": {
              "anyOf": [
                { "type": "string" },
                { "type": "number" },
                { "type": "boolean" },
                { "type": "null" }
              ]
            },
            "default": {}
          }
        },
        "required": ["id"]
      }
    },
    "edges": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "id": { "type": "string" },
          "src": { "type": "string" },
          "dst": { "type": "string" },
          "label": { "type": "string" },
          "weight": { "type": "number" },
          "properties": {
            "type": "object",
            "additionalProperties": {
              "anyOf": [
                { "type": "string" },
                { "type": "number" },
                { "type": "boolean" },
                { "type": "null" }
              ]
            },
            "default": {}
          }
        },
        "required": ["src", "dst"]
      }
    },
    "meta": {
      "type": "object",
      "properties": {
        "stats": {
          "type": "object",
          "properties": {
            "num_nodes": { "type": "integer", "minimum": 0 },
            "num_edges": { "type": "integer", "minimum": 0 }
          },
          "additionalProperties": false
        },
        "focus": { "type": "string" },
        "created_at": { "type": "string", "format": "date-time" },
        "updated_at": { "type": "string", "format": "date-time" }
      },
      "additionalProperties": true,
      "default": {}
    }
  },
  "required": ["nodes", "edges"],
  "additionalProperties": true
}