-const std::string NODES = "nodes";
-const std::string SCENES = "scenes";
-const std::string NODE = "node";
-const std::string URI = "uri";
-const std::string URL = "url";
-const std::string CUSTOMIZATION = "customization";
-const std::string HINTS = "hints";
-const std::string NAME("name");
-const std::string BLEND_SHAPE_HEADER("blendShapeHeader");
-const std::string BLEND_SHAPES("blendShapes");
-const std::string BLEND_SHAPE_VERSION_1_0("1.0");
-const std::string BLEND_SHAPE_VERSION_2_0("2.0");
-const std::string VERSION("version");
+const char* NODES = "nodes";
+const char* SCENES = "scenes";
+const char* NODE = "node";
+const char* URI = "uri";
+const char* URL = "url";
+const char* HINTS = "hints";
+const char* NAME("name");
+const char* BLEND_SHAPE_HEADER("blendShapeHeader");
+const char* BLEND_SHAPES("blendShapes");
+const char* BLEND_SHAPE_VERSION_1_0("1.0");
+const char* BLEND_SHAPE_VERSION_2_0("2.0");
+const char* VERSION("version");