diff --git a/src/data/java/de/tudresden/inf/st/pnml/base/constants/PnmlConstants.java b/src/data/java/de/tudresden/inf/st/pnml/base/constants/PnmlConstants.java
index c9f39d7681204affff227e014a7b2da1eac7d033..97c99932b57171f2be21fb696b8efc214c302652 100644
--- a/src/data/java/de/tudresden/inf/st/pnml/base/constants/PnmlConstants.java
+++ b/src/data/java/de/tudresden/inf/st/pnml/base/constants/PnmlConstants.java
@@ -75,4 +75,18 @@ public final class PnmlConstants {
     public static final String ARC_TYPE_KEY = "type";
     public static final String DEFAULT_ARC = "default";
     public static final String INHIBITOR_ARC = "inhibitor";
+
+    // LRPN keys
+    public static final String CHANNEL_PORTS_KEY = "ports";
+    public static final String CHANNEL_PORT_KEY = "port";
+    public static final String CHANNEL_PLACE_KEY = "placeId";
+    public static final String CHANNEL_NAME_KEY = "name";
+    public static final String CHANNEL_PLACE_TYPE_KEY = "placeType";
+    public static final String CHANNEL_PLACE_TYPE_SUB_KEY = "sub";
+    public static final String CHANNEL_PLACE_TYPE_PUB_KEY = "pub";
+    public static final String CHANNEL_PLACE_TYPE_CLIENT_RES_KEY = "cres";
+    public static final String CHANNEL_PLACE_TYPE_CLIENT_REQ_KEY = "creq";
+    public static final String CHANNEL_PLACE_TYPE_SERVER_RES_KEY = "sres";
+    public static final String CHANNEL_PLACE_TYPE_SERVER_REQ_KEY = "sreq";
+
 }