diff --git a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/LibraryPrototypeProvider.java b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/LibraryPrototypeProvider.java
index 9a71eeaa3a8b20bf1ded3e3b0d05129317a9d66b..6e74ac9c8a36bc3e00214c90a3503b713e810175 100644
--- a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/LibraryPrototypeProvider.java
+++ b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/LibraryPrototypeProvider.java
@@ -25,7 +25,7 @@ import org.fortiss.tooling.kernel.extension.base.PrototypeProviderBase;
 import org.fortiss.tooling.kernel.extension.data.Prototype;
 import org.fortiss.tooling.kernel.extension.data.PrototypeCategory;
 import org.fortiss.tooling.kernel.model.ILibraryElement;
-import org.fortiss.tooling.kernel.model.ILibraryElementReference;
+import org.fortiss.tooling.kernel.model.ILibraryPackage;
 import org.fortiss.tooling.kernel.service.ILibraryService;
 
 /**
@@ -34,7 +34,7 @@ import org.fortiss.tooling.kernel.service.ILibraryService;
  * @author ratiu
  * @author $Author: hoelzl $
  * @version $Rev: 18709 $
- * @ConQAT.Rating YELLOW Hash: A8413CD1A37B7C56922144AB4641F72D
+ * @ConQAT.Rating YELLOW Hash: C80FA91F50ADA9FFBC25CE927814BF6C
  */
 public class LibraryPrototypeProvider extends PrototypeProviderBase {
 
@@ -63,7 +63,7 @@ public class LibraryPrototypeProvider extends PrototypeProviderBase {
 
 			prototypes.add(prot);
 
-			String categoryName = ((ILibraryElementReference)prot.getPrototype()).getURI();
+			String categoryName = ((ILibraryPackage)libElem.eContainer()).getName();
 			PrototypeCategory current = registerPrototypeCategory(libraryCategory, categoryName);
 			current.add(prot);
 		}
diff --git a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/LibraryService.java b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/LibraryService.java
index 02d3dc55073eae20d975cdade1938e75c8bc7df1..cbf527055ccecf2509015988a4579d3d508f4052 100644
--- a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/LibraryService.java
+++ b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/LibraryService.java
@@ -51,7 +51,7 @@ import org.fortiss.tooling.kernel.service.base.EObjectAwareServiceBase;
  * @author ratiu
  * @author $Author: ratiu $
  * @version $Rev: 5274 $
- * @ConQAT.Rating YELLOW Hash: C87F42DC737D4C418608861E2B0C7586
+ * @ConQAT.Rating YELLOW Hash: EDFE0F8D76B0459B1F17338F61184B5B
  */
 public class LibraryService extends EObjectAwareServiceBase<ILibraryElementHandler<EObject>>
 		implements ILibraryService {