Schemas

      {
        "properties": {
          "A": {
            "description": "A's description.",
            "$ref": "http://jsonschema.net/examples/B.json"
          }
        }
      }
      
      {
        "properties": {
          "B": {
            "description": "B's description",
            "$ref": "http://jsonschema.net/examples/C.json"
          }
        }
      }

      
      {
        "properties": {
          "C": {
            "description": "C's description.",
            "type":"any"
          }
        }
      }
      
      {
        "type": "object",
        "$schema": "http://json-schema.org/draft-03/schema",
        "properties": {
          "age": {
            "type": "number"
          },
          "name": {
            "type": "string"
          }
        },
        "extends": {
          "type":"string"
        }
      }
      
      {
        "type": "object",
        "$schema": "http://json-schema.org/draft-03/schema",
        "properties": {
          "age": {
            "type": "number"
          },
          "name": {
            "type": "string"
          }
        },
        "extends": {
          "$ref": "http://jsonschema.net/examples/B.json"
        }
      }
      
        {
          "type": "object",
          "$schema": "http://json-schema.org/draft-03/schema",
          "properties": {
            "age": {
              "required": true,
              "extends": {
                "type": "number",
                "required": false
              }
            }
          }
        }