{
  "description": "Adds an extra Value type called \"my_value\" which is invalid. In the future there might be backwards compatible Values and they should be ignored by decoders, but for version 2.x this should be a fatal error.",
  "specification_reference": "https://github.com/mapbox/vector-tile-spec/blob/master/2.1/README.md#41-layers",
  "validity": {
    "v1": false,
    "v2": false,
    "error": "fatal"
  },
  "proto": "package vector_tile;\n\noption optimize_for = LITE_RUNTIME;\n\nmessage Tile {\n\n        // GeomType is described in section 4.3.4 of the specification\n        enum GeomType {\n             UNKNOWN = 0;\n             POINT = 1;\n             LINESTRING = 2;\n             POLYGON = 3;\n        }\n\n        // Variant type encoding\n        // The use of values is described in section 4.1 of the specification\n        message Value {\n                // Exactly one of these values must be present in a valid message\n                optional string string_value = 1;\n                optional float float_value = 2;\n                optional double double_value = 3;\n                optional int64 int_value = 4;\n                optional uint64 uint_value = 5;\n                optional sint64 sint_value = 6;\n                optional bool bool_value = 7;\n\n                optional int64 my_value = 20; extensions 21 to max;\n        }\n\n        // Features are described in section 4.2 of the specification\n        message Feature {\n                optional uint64 id = 1 [ default = 0 ];\n\n                // Tags of this feature are encoded as repeated pairs of\n                // integers.\n                // A detailed description of tags is located in sections\n                // 4.2 and 4.4 of the specification\n                repeated uint32 tags = 2 [ packed = true ];\n\n                // The type of geometry stored in this feature.\n                optional GeomType type = 3 [ default = UNKNOWN ];\n\n                // Contains a stream of commands and parameters (vertices).\n                // A detailed description on geometry encoding is located in \n                // section 4.3 of the specification.\n                repeated uint32 geometry = 4 [ packed = true ];\n        }\n\n        // Layers are described in section 4.1 of the specification\n        message Layer {\n                // Any compliant implementation must first read the version\n                // number encoded in this message and choose the correct\n                // implementation for this version number before proceeding to\n                // decode other parts of this message.\n                required uint32 version = 15 [ default = 1 ];\n\n                required string name = 1;\n\n                // The actual features in this tile.\n                repeated Feature features = 2;\n\n                // Dictionary encoding for keys\n                repeated string keys = 3;\n\n                // Dictionary encoding for values\n                repeated Value values = 4;\n\n                // Although this is an \"optional\" field it is required by the specification.\n                // See https://github.com/mapbox/vector-tile-spec/issues/47\n                optional uint32 extent = 5 [ default = 4096 ];\n\n                extensions 16 to max;\n        }\n\n        repeated Layer layers = 3;\n\n        extensions 16 to 8191;\n}\n"
}