gistfile1.js

var doc, env, report, schema;

schema = {
  "paneSchema": {
    "type": "object",
    "properties": {
      "height": {
        "type": "number"
      }
    }
  },
  "properties": {
    "topPane": {
      "$ref": "#/paneSchema"
    },
    "bottomPane": {
      "$ref": "#/paneSchema"
    }
  }
};

doc = {
  "topPane": {
    "height": 10
  },
  "bottomPane": {
    "height": "not-a-number"
  }
};

env = JSV.createEnvironment();

report = env.validate(doc, schema);  

//   *****  results in
[ { uri: 'urn:uuid:d7db063a-5232-4c3b-9d1b-8818ea1cda94#/properties/topPane',
    schemaUri: 'http://json-schema.org/draft-03/hyper-schema#',
    attribute: '{link:full}',
    message: 'Unknown schema reference',
    details: 'urn:uuid:d7db063a-5232-4c3b-9d1b-8818ea1cda94#/paneSchema' } ]