diff --git a/li.strolch.model/src/main/java/li/strolch/model/StrolchModelConstants.java b/li.strolch.model/src/main/java/li/strolch/model/StrolchModelConstants.java
index 7cb4979a7..753a78ce5 100644
--- a/li.strolch.model/src/main/java/li/strolch/model/StrolchModelConstants.java
+++ b/li.strolch.model/src/main/java/li/strolch/model/StrolchModelConstants.java
@@ -66,6 +66,10 @@ public class StrolchModelConstants {
 	public static final String BAG_RELATIONS = "relations";
 	public static final String BAG_PARAMETERS = "parameters";
 	public static final String TYPE_PARAMETERS = "Parameters";
+	public static final String TYPE_VERSION = "Version";
+	public static final String TYPE_MEMORY = "Memory";
+	public static final String TYPE_OPERATING_SYSTEM = "OperatingSystem";
+	public static final String TYPE_ROOT = "Root";
 	public static final String TYPE_RELATIONS = "Relations";
 	public static final String TYPE_ENUMERATION = "Enumeration";
 	public static final String TYPE_CONFIGURATION = "Configuration";