diff --git a/openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/helper/entity/EntityTypeUtils.java b/openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/helper/entity/EntityTypeUtils.java
new file mode 100644
index 0000000000000000000000000000000000000000..7e988389b872be4e488104aa0ae030d3b3184976
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+++ b/openbis/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/helper/entity/EntityTypeUtils.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2017 ETH Zuerich, SIS
+ *
+ * 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 ch.ethz.sis.openbis.generic.server.asapi.v3.helper.entity;
+
+import java.util.Collection;
+
+import ch.ethz.sis.openbis.generic.asapi.v3.dto.property.create.PropertyAssignmentCreation;
+import ch.systemsx.cisd.common.exceptions.UserFailureException;
+
+/**
+ * 
+ *
+ * @author Franz-Josef Elmer
+ */
+public class EntityTypeUtils
+{
+    public static void checkPropertyAssignmentCreations(Collection<PropertyAssignmentCreation> propertyAssignments)
+    {
+        if (propertyAssignments != null)
+        {
+            for (PropertyAssignmentCreation assignmentCreation : propertyAssignments)
+            {
+                if (assignmentCreation.getPropertyTypeId() == null)
+                {
+                    throw new UserFailureException("PropertyTypeId cannot be null.");
+                }
+                if (assignmentCreation.getOrdinal() != null && assignmentCreation.getOrdinal() <= 0)
+                {
+                    throw new UserFailureException("Ordinal cannot be <= 0.");
+                }
+            }
+        }
+    }
+}