diff --git a/core/api/src/main/java/org/onosproject/ui/topo/TopoConstants.java b/core/api/src/main/java/org/onosproject/ui/topo/TopoConstants.java
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+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package org.onosproject.ui.topo;
+
+/**
+ * Defines string constants used in the Topology View of the ONOS GUI.
+ * <p>
+ * See also:
+ * <ul>
+ *     <li> https://wiki.onosproject.org/display/ONOS/UI+Service+-+GlyphService </li>
+ * </ul>
+ */
+public final class TopoConstants {
+
+    /**
+     * Defines constants for standard glyph identifiers.
+     */
+    public static final class Glyphs {
+        public static final String UNKNOWN = "unknown";
+        public static final String BIRD = "bird";
+        public static final String NODE = "node";
+        public static final String SWITCH = "switch";
+        public static final String ROADM = "roadm";
+        public static final String ENDSTATION = "endstation";
+        public static final String ROUTER = "router";
+        public static final String BGP_SPEAKER = "bgpSpeaker";
+        public static final String CHAIN = "chain";
+        public static final String CROWN = "crown";
+        public static final String TOPO = "topo";
+        public static final String REFRESH = "refresh";
+        public static final String GARBAGE = "garbage";
+        public static final String FLOW_TABLE = "flowTable";
+        public static final String PORT_TABLE = "portTable";
+        public static final String GROUP_TABLE = "groupTable";
+        public static final String SUMMARY = "summary";
+        public static final String DETAILS = "details";
+        public static final String PORTS = "ports";
+        public static final String MAP = "map";
+        public static final String CYCLE_LABELS = "cycleLabels";
+        public static final String OBLIQUE = "oblique";
+        public static final String FILTERS = "filters";
+        public static final String RESET_ZOOM = "resetZoom";
+        public static final String RELATED_INTENTS = "relatedIntents";
+        public static final String NEXT_INTENT = "nextIntent";
+        public static final String PREV_INTENT = "prevIntent";
+        public static final String INTENT_TRAFFIC = "intentTraffic";
+        public static final String ALL_TRAFFIC = "allTraffic";
+        public static final String FLOWS = "flows";
+        public static final String EQ_MASTER = "eqMaster";
+        public static final String UI_ATTACHED = "uiAttached";
+        public static final String CHECK_MARK = "checkMark";
+        public static final String X_MARK = "xMark";
+        public static final String TRIANGLE_UP = "triangleUp";
+        public static final String TRIANGLE_DOWN = "triangleDown";
+        public static final String PLUS = "plus";
+        public static final String MINUS = "minus";
+        public static final String PLAY = "play";
+        public static final String STOP = "stop";
+        public static final String CLOUD = "cloud";
+    }
+}