diff --git a/li.strolch.model/src/main/java/li/strolch/model/Tags.java b/li.strolch.model/src/main/java/li/strolch/model/Tags.java
index 6ceb193e6..3112aed03 100644
--- a/li.strolch.model/src/main/java/li/strolch/model/Tags.java
+++ b/li.strolch.model/src/main/java/li/strolch/model/Tags.java
@@ -157,6 +157,7 @@ public class Tags {
 		public static final String WITH_LOCATOR = "withLocator";
 		public static final String WITH_VERSION = "withVersion";
 		public static final String PARAMS = "params";
+		public static final String OPERATION = "operation";
 
 		public static final String APP_VERSION = "appVersion";
 		public static final String SYSTEM_STATE = "systemState";