{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Mind Map Schema",
  "description": "Schema for Freeplane-compatible mind map YAML format",
  
  "definitions": {
    "node": {
      "type": "object",
      "required": ["title"],
      "properties": {
        "title": {
          "type": "string",
          "description": "The display text for the node"
        },
        "note": {
          "type": "string",
          "description": "Rich text note attached to the node"
        },
        "children": {
          "type": "object",
          "description": "Child nodes of this node",
          "patternProperties": {
            "^[a-zA-Z0-9_]+$": {
              "$ref": "#/definitions/node"
            }
          },
          "additionalProperties": false
        }
      },
      "additionalProperties": false
    }
  },

  "type": "object",
  "required": ["root"],
  "properties": {
    "root": {
      "allOf": [
        { "$ref": "#/definitions/node" },
        { 
          "required": ["children"],
          "description": "The root node must have at least one child"
        }
      ]
    }
  },
  "additionalProperties": false,

  "examples": [
    {
      "root": {
        "title": "Example Mind Map",
        "note": "This is the root node",
        "children": {
          "topic1": {
            "title": "First Topic",
            "note": "Note for first topic",
            "children": {
              "subtopic1": {
                "title": "Subtopic 1",
                "note": "Note for subtopic"
              }
            }
          },
          "topic2": {
            "title": "Second Topic",
            "note": "Note for second topic"
          }
        }
      }
    }
  ]
}