diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/ICommonClientService.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/ICommonClientService.java
index b10eecf536de21708b2611a4bd6e07341a4afeff..31a4639ae3bfc73a79adb1715d17c9226651f318 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/ICommonClientService.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/ICommonClientService.java
@@ -485,6 +485,10 @@ public interface ICommonClientService extends IClientService
     public void deleteVocabularies(List<TechId> vocabualryIds, String reason)
             throws UserFailureException;
 
+    /** Deletes the specified property types. */
+    public void deletePropertyTypes(List<TechId> propertyTypeIds, String reason)
+            throws UserFailureException;
+
     /**
      * Deletes specified attachments (all versions with given file names) of specified attachment
      * holder.
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/ICommonClientServiceAsync.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/ICommonClientServiceAsync.java
index d3051cc6bbb70c86ba2564a51fe4b88a65b228ad..023d79cff531afb09000e98d9fd5666126d3493c 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/ICommonClientServiceAsync.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/ICommonClientServiceAsync.java
@@ -421,6 +421,10 @@ public interface ICommonClientServiceAsync extends IClientServiceAsync
     public void deleteVocabularies(List<TechId> vocabularyIds, String value,
             AsyncCallback<Void> asyncCallback);
 
+    /** @see ICommonClientService#deletePropertyTypes(List, String) */
+    public void deletePropertyTypes(List<TechId> propertyTypeIds, String value,
+            AsyncCallback<Void> asyncCallback);
+
     /** @see ICommonClientService#deleteAttachments(TechId, AttachmentHolderKind, List, String) */
     public void deleteAttachments(TechId holderId, AttachmentHolderKind holderKind,
             List<String> fileNames, String reason, AsyncCallback<Void> asyncCallback);
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/property_type/PropertyTypeGrid.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/property_type/PropertyTypeGrid.java
index 31822fbd2818ab2b31501df1302400d520e967f2..f58af0de665fadcef509d1861b2a279a43c32c01 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/property_type/PropertyTypeGrid.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/property_type/PropertyTypeGrid.java
@@ -21,6 +21,7 @@ import static ch.systemsx.cisd.openbis.generic.shared.basic.dto.DatabaseModifica
 
 import java.util.List;
 
+import com.extjs.gxt.ui.client.widget.Dialog;
 import com.extjs.gxt.ui.client.widget.MessageBox;
 import com.extjs.gxt.ui.client.widget.Window;
 import com.extjs.gxt.ui.client.widget.form.TextField;
@@ -37,6 +38,7 @@ import ch.systemsx.cisd.openbis.generic.client.web.client.application.model.Prop
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.columns.framework.IColumnDefinitionKind;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.columns.specific.PropertyTypeColDefKind;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.grid.AbstractSimpleBrowserGrid;
+import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.grid.IBrowserGridActionInvoker;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.grid.IDisposableComponent;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.widget.AbstractRegistrationDialog;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.util.IDelegatedAction;
@@ -100,6 +102,36 @@ public class PropertyTypeGrid extends AbstractSimpleBrowserGrid<PropertyType>
                         }
                     }));
 
+        addButton(createSelectedItemsButton(viewContext.getMessage(Dict.BUTTON_DELETE),
+                new AbstractCreateDialogListener()
+                    {
+
+                        @Override
+                        protected Dialog createDialog(List<PropertyType> propertyTypes,
+                                IBrowserGridActionInvoker invoker)
+                        {
+                            return new PropertyTypeListDeletionConfirmationDialog(viewContext,
+                                    propertyTypes, createDeletionCallback(invoker));
+                        }
+
+                        @Override
+                        protected boolean validateSelectedData(List<PropertyType> data)
+                        {
+                            String errorMsg =
+                                    "Internally managed property types cannot be deleted.";
+                            for (PropertyType propertyType : data)
+                            {
+                                if (propertyType.isManagedInternally())
+                                {
+                                    MessageBox.alert("Error", errorMsg, null);
+                                    return false;
+                                }
+                            }
+                            return true;
+                        }
+                    }));
+        allowMultipleSelection(); // we allow deletion of multiple attachments
+
         addEntityOperationsSeparator();
     }
 
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/property_type/PropertyTypeListDeletionConfirmationDialog.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/property_type/PropertyTypeListDeletionConfirmationDialog.java
new file mode 100644
index 0000000000000000000000000000000000000000..9d802bd6e3c9d22452c58b2e3042d42e3d31de6e
--- /dev/null
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/property_type/PropertyTypeListDeletionConfirmationDialog.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2009 ETH Zuerich, CISD
+ *
+ * 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.systemsx.cisd.openbis.generic.client.web.client.application.ui.property_type;
+
+import java.util.List;
+
+import ch.systemsx.cisd.openbis.generic.client.web.client.ICommonClientServiceAsync;
+import ch.systemsx.cisd.openbis.generic.client.web.client.application.AbstractAsyncCallback;
+import ch.systemsx.cisd.openbis.generic.client.web.client.application.Dict;
+import ch.systemsx.cisd.openbis.generic.client.web.client.application.IViewContext;
+import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.widget.AbstractDataListDeletionConfirmationDialog;
+import ch.systemsx.cisd.openbis.generic.shared.basic.TechId;
+import ch.systemsx.cisd.openbis.generic.shared.basic.dto.PropertyType;
+
+public final class PropertyTypeListDeletionConfirmationDialog extends
+        AbstractDataListDeletionConfirmationDialog<PropertyType>
+{
+
+    private final IViewContext<ICommonClientServiceAsync> viewContext;
+
+    private final AbstractAsyncCallback<Void> callback;
+
+    public PropertyTypeListDeletionConfirmationDialog(
+            IViewContext<ICommonClientServiceAsync> viewContext, List<PropertyType> propertyTypes,
+            AbstractAsyncCallback<Void> callback)
+    {
+        super(viewContext, propertyTypes);
+        this.viewContext = viewContext;
+        this.callback = callback;
+    }
+
+    @Override
+    protected void executeConfirmedAction()
+    {
+        viewContext.getCommonService().deletePropertyTypes(TechId.createList(data),
+                reason.getValue(), callback);
+    }
+
+    @Override
+    protected String getEntityName()
+    {
+        return messageProvider.getMessage(Dict.PROPERTY_TYPE);
+    }
+
+}
\ No newline at end of file
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/vocabulary/VocabularyGrid.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/vocabulary/VocabularyGrid.java
index 56679e76d312c67a74f33c81e0f5260616ac3585..e637194a3812468aad68e2db512fff3d23fbbced 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/vocabulary/VocabularyGrid.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/vocabulary/VocabularyGrid.java
@@ -132,7 +132,7 @@ public class VocabularyGrid extends AbstractSimpleBrowserGrid<Vocabulary>
                         @Override
                         protected boolean validateSelectedData(List<Vocabulary> data)
                         {
-                            String errorMsg = "Internally managed vocabulary cannot be deleted.";
+                            String errorMsg = "Internally managed vocabularies cannot be deleted.";
                             for (Vocabulary vocabulary : data)
                             {
                                 if (vocabulary.isManagedInternally())
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/server/CommonClientService.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/server/CommonClientService.java
index a010024aa5eabbb947b89dafb299b880be53df76..167554f8f338297c3d01fadd88bbe41840b38af4 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/server/CommonClientService.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/server/CommonClientService.java
@@ -1392,6 +1392,19 @@ public final class CommonClientService extends AbstractClientService implements
         }
     }
 
+    public void deletePropertyTypes(List<TechId> propertyTypeIds, String reason)
+            throws ch.systemsx.cisd.openbis.generic.client.web.client.exception.UserFailureException
+    {
+        try
+        {
+            final String sessionToken = getSessionToken();
+            commonServer.deletePropertyTypes(sessionToken, propertyTypeIds, reason);
+        } catch (final UserFailureException e)
+        {
+            throw UserFailureExceptionTranslator.translate(e);
+        }
+    }
+
     public void deleteAttachments(TechId holderId, AttachmentHolderKind holderKind,
             List<String> fileNames, String reason)
             throws ch.systemsx.cisd.openbis.generic.client.web.client.exception.UserFailureException
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CommonServer.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CommonServer.java
index d63d4d5a7cc585f2041f8b439eb838f0366d66d9..fd421a6613d471204599a7df0229056d77f559b0 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CommonServer.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CommonServer.java
@@ -858,6 +858,22 @@ public final class CommonServer extends AbstractServer<ICommonServer> implements
         }
     }
 
+    public void deletePropertyTypes(String sessionToken, List<TechId> propertyTypeIds, String reason)
+    {
+        Session session = getSessionManager().getSession(sessionToken);
+        try
+        {
+            IPropertyTypeBO propertyTypeBO = businessObjectFactory.createPropertyTypeBO(session);
+            for (TechId id : propertyTypeIds)
+            {
+                propertyTypeBO.deleteByTechId(id, reason);
+            }
+        } catch (final DataAccessException ex)
+        {
+            throw createUserFailureException(ex);
+        }
+    }
+
     public void deleteExperimentAttachments(String sessionToken, TechId experimentId,
             List<String> fileNames, String reason)
     {
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CommonServerLogger.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CommonServerLogger.java
index b80d210a459d7d0206bc6bfe64f81e906285a64c..83310879ee081e493882816bf953f1bc3fc1d224 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CommonServerLogger.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CommonServerLogger.java
@@ -441,6 +441,12 @@ final class CommonServerLogger extends AbstractServerLogger implements ICommonSe
                 reason);
     }
 
+    public void deletePropertyTypes(String sessionToken, List<TechId> propertyTypeIds, String reason)
+    {
+        logTracking(sessionToken, "delete_property_types", "IDS(%s) REASON(%s)", propertyTypeIds,
+                reason);
+    }
+
     public void deleteExperimentAttachments(String sessionToken, TechId experimentId,
             List<String> fileNames, String reason)
     {
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/bo/IPropertyTypeBO.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/bo/IPropertyTypeBO.java
index 8d0e8bc48d1b571bbf4a752c268b281ffbef0e84..70459793e518d55ba4078f10da3957a9bf3ff9aa 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/bo/IPropertyTypeBO.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/bo/IPropertyTypeBO.java
@@ -17,6 +17,7 @@
 package ch.systemsx.cisd.openbis.generic.server.business.bo;
 
 import ch.systemsx.cisd.common.exceptions.UserFailureException;
+import ch.systemsx.cisd.openbis.generic.shared.basic.TechId;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.IPropertyTypeUpdates;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.PropertyType;
 import ch.systemsx.cisd.openbis.generic.shared.dto.PropertyTypePE;
@@ -50,4 +51,12 @@ public interface IPropertyTypeBO extends IBusinessObject
      */
     public void update(IPropertyTypeUpdates updates);
 
+    /**
+     * Deletes property type for specified reason.
+     * 
+     * @param propertyTypeId property type technical identifier
+     * @throws UserFailureException if property type with given technical identifier is not found.
+     */
+    void deleteByTechId(TechId propertyTypeId, String reason);
+
 }
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/bo/PropertyTypeBO.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/bo/PropertyTypeBO.java
index 812b2be8c647e9f5b4f07c4a1153a64c4c06feb7..b6ae3d7fdecb05c2ff4ba1a58295e342e99df324 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/bo/PropertyTypeBO.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/bo/PropertyTypeBO.java
@@ -17,6 +17,7 @@
 package ch.systemsx.cisd.openbis.generic.server.business.bo;
 
 import org.springframework.dao.DataAccessException;
+import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.dao.DataRetrievalFailureException;
 
 import ch.systemsx.cisd.common.exceptions.UserFailureException;
@@ -29,10 +30,14 @@ import ch.systemsx.cisd.openbis.generic.shared.basic.dto.PropertyType;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.Vocabulary;
 import ch.systemsx.cisd.openbis.generic.shared.dto.DataTypePE;
 import ch.systemsx.cisd.openbis.generic.shared.dto.EntityTypePE;
+import ch.systemsx.cisd.openbis.generic.shared.dto.EventPE;
+import ch.systemsx.cisd.openbis.generic.shared.dto.EventType;
 import ch.systemsx.cisd.openbis.generic.shared.dto.MaterialTypePE;
+import ch.systemsx.cisd.openbis.generic.shared.dto.PersonPE;
 import ch.systemsx.cisd.openbis.generic.shared.dto.PropertyTypePE;
 import ch.systemsx.cisd.openbis.generic.shared.dto.Session;
 import ch.systemsx.cisd.openbis.generic.shared.dto.VocabularyPE;
+import ch.systemsx.cisd.openbis.generic.shared.dto.EventPE.EntityType;
 import ch.systemsx.cisd.openbis.generic.shared.dto.properties.EntityDataType;
 import ch.systemsx.cisd.openbis.generic.shared.dto.properties.EntityKind;
 
@@ -164,4 +169,42 @@ public final class PropertyTypeBO extends VocabularyBO implements IPropertyTypeB
     {
         super.loadDataByTechId(vocabularyId);
     }
+
+    @Override
+    public void deleteByTechId(TechId propertyTypeId, String reason) throws UserFailureException
+    {
+        loadDataByTechId(propertyTypeId);
+        try
+        {
+            getPropertyTypeDAO().delete(propertyTypePE);
+            getEventDAO().persist(
+                    createDeletionEvent(propertyTypePE, session.tryGetPerson(), reason));
+        } catch (final DataIntegrityViolationException ex)
+        {
+            throwEntityInUseException(
+                    String.format("Property Type '%s'", propertyTypePE.getCode()), null);
+        } catch (final DataAccessException ex)
+        {
+            throwException(ex, String.format("Property Type '%s'", propertyTypePE.getCode()));
+        }
+    }
+
+    public static EventPE createDeletionEvent(PropertyTypePE propertyTypePE, PersonPE registrator,
+            String reason)
+    {
+        EventPE event = new EventPE();
+        event.setEventType(EventType.DELETION);
+        event.setEntityType(EntityType.PROPERTY_TYPE);
+        event.setIdentifier(propertyTypePE.getCode());
+        event.setDescription(getDeletionDescription(propertyTypePE));
+        event.setReason(reason);
+        event.setRegistrator(registrator);
+
+        return event;
+    }
+
+    private static String getDeletionDescription(PropertyTypePE propertyTypePE)
+    {
+        return String.format("%s", propertyTypePE.getCode());
+    }
 }
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/ExternalDataDAO.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/ExternalDataDAO.java
index 9fc1c3a3f5437c34d9d22e44244f5d9823772e75..61ba92db49cb59bf574fbaf7ccd670ff8dcd762b 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/ExternalDataDAO.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/ExternalDataDAO.java
@@ -219,10 +219,10 @@ final class ExternalDataDAO extends AbstractGenericEntityDAO<ExternalDataPE> imp
         // TODO 2009-06-09, Piotr Buczek: remove this check if we change many2many -> one2many
         if (entity.getChildren().size() > 0)
         {
-            throw new DataIntegrityViolationException(
-                    "Entity cannot be deleted because children datasets are connected.");
+            throw new DataIntegrityViolationException(String.format(
+                    "External Data '%s' cannot be deleted because children datasets are connected.",
+                    entity.getCode()));
         }
         super.delete(entity);
     }
-
 }
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/PropertyTypeDAO.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/PropertyTypeDAO.java
index 23e065390d1ae6ce13f3272b54d915adc1c007ea..be869b605babf1f7cfd1bcd25d3c22f370811217 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/PropertyTypeDAO.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/PropertyTypeDAO.java
@@ -21,6 +21,7 @@ import java.util.List;
 import org.apache.log4j.Logger;
 import org.hibernate.SessionFactory;
 import org.springframework.dao.DataAccessException;
+import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.jdbc.support.JdbcAccessor;
 import org.springframework.orm.hibernate3.HibernateTemplate;
 
@@ -153,4 +154,23 @@ final class PropertyTypeDAO extends AbstractGenericEntityDAO<PropertyTypePE> imp
         }
     }
 
+    @Override
+    public void delete(PropertyTypePE entity) throws DataAccessException
+    {
+        assert entity != null : "entity unspecified";
+        int assignmentsSize =
+                entity.getDataSetTypePropertyTypes().size()
+                        + entity.getExperimentTypePropertyTypes().size()
+                        + entity.getMaterialTypePropertyTypes().size()
+                        + entity.getSampleTypePropertyTypes().size();
+        if (assignmentsSize > 0)
+        {
+            String errorMsgFormat =
+                    "Property Type '%s' cannot be deleted because entity types are assigned.";
+            throw new DataIntegrityViolationException(String.format(errorMsgFormat, entity
+                    .getCode()));
+        }
+        super.delete(entity);
+    }
+
 }
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/ICommonServer.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/ICommonServer.java
index 80b60a729003b7ced8bfe3b63a9261a72b1a92c8..4d66fb9384ccd5039bd22a27943da7e203a62496 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/ICommonServer.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/ICommonServer.java
@@ -312,6 +312,14 @@ public interface ICommonServer extends IServer
     @DatabaseUpdateModification(value = ObjectKind.PROPERTY_TYPE)
     public void updatePropertyType(final String sessionToken, final IPropertyTypeUpdates updates);
 
+    /**
+     * Deletes specified property types.
+     */
+    @Transactional
+    @RolesAllowed(RoleSet.INSTANCE_ADMIN)
+    @DatabaseCreateOrDeleteModification(value = ObjectKind.PROPERTY_TYPE)
+    public void deletePropertyTypes(String sessionToken, List<TechId> propertyTypeIds, String reason);
+
     /**
      * Assigns property type to entity type.
      */
@@ -366,6 +374,14 @@ public interface ICommonServer extends IServer
     @DatabaseUpdateModification(value = ObjectKind.VOCABULARY)
     public void updateVocabulary(String sessionToken, IVocabularyUpdates updates);
 
+    /**
+     * Deletes specified vocabularies.
+     */
+    @Transactional
+    @RolesAllowed(RoleSet.INSTANCE_ADMIN)
+    @DatabaseCreateOrDeleteModification(value = ObjectKind.VOCABULARY)
+    public void deleteVocabularies(String sessionToken, List<TechId> vocabularyIds, String reason);
+
     /**
      * Adds new terms to a vocabulary.
      */
@@ -525,14 +541,6 @@ public interface ICommonServer extends IServer
             @AuthorizationGuard(guardClass = ExperimentTechIdPredicate.class) List<TechId> experimentIds,
             String reason);
 
-    /**
-     * Deletes specified vocabularies.
-     */
-    @Transactional
-    @RolesAllowed(RoleSet.INSTANCE_ADMIN)
-    @DatabaseCreateOrDeleteModification(value = ObjectKind.VOCABULARY)
-    public void deleteVocabularies(String sessionToken, List<TechId> vocabularyIds, String reason);
-
     /**
      * Deletes specified attachments (all versions with given file names) of specified experiment.
      */
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/PropertyTypePE.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/PropertyTypePE.java
index 70b55a0e78557fa2cef64ee345f8663439e82f39..56767db3524c67c25aa0b9b9a24cdb225f856aa5 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/PropertyTypePE.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/PropertyTypePE.java
@@ -19,7 +19,6 @@ package ch.systemsx.cisd.openbis.generic.shared.dto;
 import java.util.HashSet;
 import java.util.Set;
 
-import javax.persistence.CascadeType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
@@ -302,7 +301,7 @@ public final class PropertyTypePE extends HibernateAbstractRegistrationHolder im
         return getCode();
     }
 
-    @OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "propertyTypeInternal")
+    @OneToMany(fetch = FetchType.LAZY, mappedBy = "propertyTypeInternal")
     private Set<SampleTypePropertyTypePE> getSampleTypePropertyTypesInternal()
     {
         return sampleTypePropertyTypes;
@@ -343,7 +342,7 @@ public final class PropertyTypePE extends HibernateAbstractRegistrationHolder im
         getSampleTypePropertyTypesInternal().add(child);
     }
 
-    @OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "propertyTypeInternal")
+    @OneToMany(fetch = FetchType.LAZY, mappedBy = "propertyTypeInternal")
     private Set<ExperimentTypePropertyTypePE> getExperimentTypePropertyTypesInternal()
     {
         return experimentTypePropertyTypes;
@@ -385,7 +384,7 @@ public final class PropertyTypePE extends HibernateAbstractRegistrationHolder im
         getExperimentTypePropertyTypesInternal().add(child);
     }
 
-    @OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "propertyTypeInternal")
+    @OneToMany(fetch = FetchType.LAZY, mappedBy = "propertyTypeInternal")
     private Set<MaterialTypePropertyTypePE> getMaterialTypePropertyTypesInternal()
     {
         return materialTypePropertyTypes;
@@ -399,7 +398,7 @@ public final class PropertyTypePE extends HibernateAbstractRegistrationHolder im
         this.materialTypePropertyTypes = materialTypePropertyTypes;
     }
 
-    @OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "propertyTypeInternal")
+    @OneToMany(fetch = FetchType.LAZY, mappedBy = "propertyTypeInternal")
     private Set<DataSetTypePropertyTypePE> getDataSetTypePropertyTypesInternal()
     {
         return dataSetTypePropertyTypes;
diff --git a/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/shared/ICommonServer.java.expected b/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/shared/ICommonServer.java.expected
index 80b60a729003b7ced8bfe3b63a9261a72b1a92c8..4d66fb9384ccd5039bd22a27943da7e203a62496 100644
--- a/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/shared/ICommonServer.java.expected
+++ b/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/shared/ICommonServer.java.expected
@@ -312,6 +312,14 @@ public interface ICommonServer extends IServer
     @DatabaseUpdateModification(value = ObjectKind.PROPERTY_TYPE)
     public void updatePropertyType(final String sessionToken, final IPropertyTypeUpdates updates);
 
+    /**
+     * Deletes specified property types.
+     */
+    @Transactional
+    @RolesAllowed(RoleSet.INSTANCE_ADMIN)
+    @DatabaseCreateOrDeleteModification(value = ObjectKind.PROPERTY_TYPE)
+    public void deletePropertyTypes(String sessionToken, List<TechId> propertyTypeIds, String reason);
+
     /**
      * Assigns property type to entity type.
      */
@@ -366,6 +374,14 @@ public interface ICommonServer extends IServer
     @DatabaseUpdateModification(value = ObjectKind.VOCABULARY)
     public void updateVocabulary(String sessionToken, IVocabularyUpdates updates);
 
+    /**
+     * Deletes specified vocabularies.
+     */
+    @Transactional
+    @RolesAllowed(RoleSet.INSTANCE_ADMIN)
+    @DatabaseCreateOrDeleteModification(value = ObjectKind.VOCABULARY)
+    public void deleteVocabularies(String sessionToken, List<TechId> vocabularyIds, String reason);
+
     /**
      * Adds new terms to a vocabulary.
      */
@@ -525,14 +541,6 @@ public interface ICommonServer extends IServer
             @AuthorizationGuard(guardClass = ExperimentTechIdPredicate.class) List<TechId> experimentIds,
             String reason);
 
-    /**
-     * Deletes specified vocabularies.
-     */
-    @Transactional
-    @RolesAllowed(RoleSet.INSTANCE_ADMIN)
-    @DatabaseCreateOrDeleteModification(value = ObjectKind.VOCABULARY)
-    public void deleteVocabularies(String sessionToken, List<TechId> vocabularyIds, String reason);
-
     /**
      * Deletes specified attachments (all versions with given file names) of specified experiment.
      */