+const char* const IMAGE_URL_NAME("url");
+const char* const ATLAS_RECT_UNIFORM_NAME("uAtlasRect");
+const char* const PIXEL_AREA_UNIFORM_NAME("pixelArea");
+const char* const WRAP_MODE_UNIFORM_NAME("wrapMode");
+const char* const IMAGE_WRAP_MODE_U("wrapModeU");
+const char* const IMAGE_WRAP_MODE_V("wrapModeV");
+const char* const IMAGE_BORDER("border");
+const char* const PIXEL_ALIGNED_UNIFORM_NAME("uPixelAligned");
+const char* const ANIMATED_IMAGE_URLS_NAME("urls");
+const char* const BATCH_SIZE_NAME("batchSize");
+const char* const CACHE_SIZE_NAME("cacheSize");
+const char* const FRAME_DELAY_NAME("frameDelay");
+const char* const LOOP_COUNT_NAME("loopCount");
+const char* const MASK_CONTENT_SCALE_NAME("maskContentScale");
+const char* const CROP_TO_MASK_NAME("cropToMask");
+const char* const LOAD_POLICY_NAME("loadPolicy");
+const char* const RELEASE_POLICY_NAME("releasePolicy");
+const char* const ORIENTATION_CORRECTION_NAME("orientationCorrection");
+const char* const AUXILIARY_IMAGE_NAME("auxiliaryImage");
+const char* const AUXILIARY_IMAGE_ALPHA_NAME("auxiliaryImageAlpha");
+const char* const PLAY_RANGE_NAME("playRange");
+const char* const PLAY_STATE_NAME("playState");
+const char* const CURRENT_FRAME_NUMBER_NAME("currentFrameNumber");
+const char* const TOTAL_FRAME_NUMBER_NAME("totalFrameNumber");
+const char* const STOP_BEHAVIOR_NAME("stopBehavior");
+const char* const LOOPING_MODE_NAME("loopingMode");
+const char* const IMAGE_ATLASING("atlasing");
+const char* const SYNCHRONOUS_LOADING("synchronousLoading");
+const char* const IMAGE_FITTING_MODE("fittingMode");
+const char* const IMAGE_SAMPLING_MODE("samplingMode");
+const char* const IMAGE_DESIRED_WIDTH("desiredWidth");
+const char* const IMAGE_DESIRED_HEIGHT("desiredHeight");
+const char* const ALPHA_MASK_URL("alphaMaskUrl");
+const char* const REDRAW_IN_SCALING_DOWN_NAME("redrawInScalingDown");
+
+// Text visual
+const char* const TEXT_PROPERTY("text");
+const char* const FONT_FAMILY_PROPERTY("fontFamily");
+const char* const FONT_STYLE_PROPERTY("fontStyle");
+const char* const POINT_SIZE_PROPERTY("pointSize");
+const char* const MULTI_LINE_PROPERTY("multiLine");
+const char* const HORIZONTAL_ALIGNMENT_PROPERTY("horizontalAlignment");
+const char* const VERTICAL_ALIGNMENT_PROPERTY("verticalAlignment");
+const char* const TEXT_COLOR_PROPERTY("textColor");
+const char* const ENABLE_MARKUP_PROPERTY("enableMarkup");
+const char* const SHADOW_PROPERTY("shadow");
+const char* const UNDERLINE_PROPERTY("underline");
+const char* const OUTLINE_PROPERTY("outline");
+const char* const BACKGROUND_PROPERTY("textBackground");
+
+//NPatch visual
+const char* const BORDER_ONLY("borderOnly");
+const char* const BORDER("border");
+
+// non-animated property
+const char* const GRADIENT_TYPE_NAME("gradientType");
+const char* const UNIT_TYPE_NAME("unitType");
+const char* const SPREAD_TYPE_NAME("spreadType");
+
+// animated property
+const char* const START_POSITION_NAME("startPosition");
+const char* const START_COLOR_NAME("startColor");
+const char* const END_POSITION_NAME("endPosition");
+const char* const END_COLOR_NAME("endColor");
+const char* const ROTATE_CENTER_NAME("rotateCenter");
+const char* const ROTATE_AMOUNT_NAME("rotateAmount");
+const char* const OFFSET_NAME("offset");
+
+// animation parameter property
+const char* const START_VALUE_NAME("startValue");
+const char* const TARGET_VALUE_NAME("targetValue");
+const char* const DIRECTION_TYPE_NAME("directionType");
+const char* const DURATION_NAME("duration");
+const char* const DELAY_NAME("delay");
+const char* const REPEAT_NAME("repeat");
+const char* const REPEAT_DELAY_NAME("repeatDelay");
+const char* const MOTION_TYPE_NAME("motionType");
+const char* const EASING_TYPE_NAME("easingType");
+
+// common shader property
+const char* const UNIFORM_START_POINT_NAME("start_point");
+const char* const UNIFORM_START_COLOR_NAME("start_color");
+const char* const UNIFORM_END_POINT_NAME("end_point");
+const char* const UNIFORM_END_COLOR_NAME("end_color");
+const char* const UNIFORM_ROTATE_CENTER_NAME("rotate_center");
+const char* const UNIFORM_ROTATE_ANGLE_NAME("rotate_angle");
+const char* const UNIFORM_OFFSET_NAME("gradient_offset");
+
+// Border visual
+const char* const COLOR_NAME("borderColor");
+const char* const SIZE_NAME("borderSize");
+const char* const ANTI_ALIASING("antiAliasing");
+
+// properties: radial gradient
+const char* const CENTER_NAME("center"); // Property::VECTOR2
+const char* const RADIUS_NAME("radius"); // Property::FLOAT
+
+// properties: linear&radial gradient
+const char* const STOP_OFFSET_NAME("stopOffset"); // Property::Array FLOAT
+const char* const STOP_COLOR_NAME("stopColor"); // Property::Array VECTOR4
+const char* const UNITS_NAME("units"); // Property::String "userSpaceOnUse | objectBoundingBox"
+const char* const SPREAD_METHOD_NAME("spreadMethod"); // Property::String "pad | reflect | repeat"
+
+//mesh visual
+const char* const OBJECT_URL_NAME("objectUrl");
+const char* const MATERIAL_URL_NAME("materialUrl");
+const char* const TEXTURES_PATH_NAME("texturesPath");
+const char* const SHADING_MODE_NAME("shadingMode");
+const char* const USE_MIPMAPPING_NAME("useMipmapping");
+const char* const USE_SOFT_NORMALS_NAME("useSoftNormals");
+const char* const LIGHT_POSITION_NAME("lightPosition");
+
+//Primitive properties
+const char* const PRIMITIVE_SHAPE("shape");
+const char* const SLICES("slices");
+const char* const STACKS("stacks");
+const char* const SCALE_TOP_RADIUS("scaleTopRadius");
+const char* const SCALE_BOTTOM_RADIUS("scaleBottomRadius");
+const char* const SCALE_HEIGHT("scaleHeight");
+const char* const SCALE_RADIUS("scaleRadius");
+const char* const SCALE_DIMENSIONS("scaleDimensions");
+const char* const BEVEL_PERCENTAGE("bevelPercentage");
+const char* const BEVEL_SMOOTHNESS("bevelSmoothness");
+const char* const LIGHT_POSITION_UNIFORM_NAME("lightPosition");
+
+// Arc visual
+const char* const THICKNESS_NAME("thickness");
+const char* const START_ANGLE_NAME("startAngle");
+const char* const SWEEP_ANGLE_NAME("sweepAngle");
+const char* const CAP_NAME("cap");