API Reference for view/AddFeature_SelectModels

        {
     "$schema": "http://json-schema.org/draft-03/schema",
     "type": "object",
     "properties": {
          "models": {
               "title": "Model Types",
               "items": {
                    "type": "object",
                    "properties": {
                         "model": {
                              "format": "uri",
                              "type": "string",
                              "title": "Model Type",
                              "target": "/api/choices/?format=json&hierarchy=[hierarchy]&auth_token=[authtoken],
                              "choices": []
                         },
                         "create_group": {
                              "type": "boolean",
                              "title": "Group this model's fields"
                         },
                         "cardinality": {
                              "default": "1",
                              "choices": [
                                   {
                                        "value": "1",
                                        "title": "Always One"
                                   },
                                   {
                                        "value": "0-1",
                                        "title": "Zero or One"
                                   },
                                   {
                                        "value": "0-N",
                                        "title": "Zero or More"
                                   },
                                   {
                                        "value": "1-N",
                                        "title": "One or More"
                                   }
                              ],
                              "type": "string",
                              "title": "How Many"
                         }
                    }
               },
               "required": false,
               "readonly": false,
               "type": "array"
          }
     },
     "schema_version": "0.1.0"
}