diff --git a/openbis/source/sql/postgresql/156/domains-156.sql b/openbis/source/sql/postgresql/156/domains-156.sql
new file mode 100644
index 0000000000000000000000000000000000000000..35e82f1966325a2ad1785d8c199e3669f4003f79
--- /dev/null
+++ b/openbis/source/sql/postgresql/156/domains-156.sql
@@ -0,0 +1,33 @@
+-- Creating domains
+
+CREATE DOMAIN AUTHORIZATION_ROLE AS VARCHAR(40) CHECK (VALUE IN ('ADMIN', 'POWER_USER', 'USER', 'OBSERVER', 'ETL_SERVER'));
+CREATE DOMAIN BOOLEAN_CHAR AS BOOLEAN DEFAULT FALSE;
+CREATE DOMAIN BOOLEAN_CHAR_OR_UNKNOWN AS CHAR(1) DEFAULT 'U' CHECK (VALUE IN ('F', 'T', 'U'));
+CREATE DOMAIN CODE AS VARCHAR(60);
+CREATE DOMAIN COLUMN_LABEL AS VARCHAR(128);
+CREATE DOMAIN DATA_STORE_SERVICE_KIND AS VARCHAR(40) CHECK (VALUE IN ('PROCESSING', 'QUERIES'));
+CREATE DOMAIN DATA_STORE_SERVICE_REPORTING_PLUGIN_TYPE AS VARCHAR(40) CHECK (VALUE IN ('TABLE_MODEL', 'DSS_LINK', 'AGGREGATION_TABLE_MODEL'));
+CREATE DOMAIN EVENT_TYPE AS VARCHAR(40) CHECK (VALUE IN ('DELETION', 'MOVEMENT'));
+CREATE DOMAIN FILE AS BYTEA;
+CREATE DOMAIN FILE_NAME AS VARCHAR(255);
+CREATE DOMAIN TEXT_VALUE AS TEXT;
+CREATE DOMAIN OBJECT_NAME AS VARCHAR(50);
+CREATE DOMAIN REAL_VALUE AS REAL;
+CREATE DOMAIN TECH_ID AS BIGINT;
+CREATE DOMAIN TIME_STAMP AS TIMESTAMP WITH TIME ZONE;
+CREATE DOMAIN TIME_STAMP_DFL AS TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP;
+CREATE DOMAIN USER_ID AS VARCHAR(50);
+CREATE DOMAIN TITLE_100 AS VARCHAR(100);
+CREATE DOMAIN GRID_EXPRESSION AS VARCHAR(2000);
+CREATE DOMAIN GRID_ID AS VARCHAR(200);
+CREATE DOMAIN ORDINAL_INT AS BIGINT CHECK (VALUE > 0);
+CREATE DOMAIN DESCRIPTION_2000 AS VARCHAR(2000);
+CREATE DOMAIN ARCHIVING_STATUS AS VARCHAR(100) CHECK (VALUE IN ('LOCKED', 'AVAILABLE', 'ARCHIVED', 'ARCHIVE_PENDING', 'UNARCHIVE_PENDING', 'BACKUP_PENDING'));
+CREATE DOMAIN QUERY_TYPE AS VARCHAR(40) CHECK (VALUE IN ('GENERIC', 'EXPERIMENT', 'SAMPLE', 'DATA_SET', 'MATERIAL'));
+CREATE DOMAIN ENTITY_KIND AS VARCHAR(40) CHECK (VALUE IN ('SAMPLE', 'EXPERIMENT', 'DATA_SET', 'MATERIAL'));
+CREATE DOMAIN SCRIPT_TYPE AS VARCHAR(40) CHECK (VALUE IN ('DYNAMIC_PROPERTY', 'MANAGED_PROPERTY', 'ENTITY_VALIDATION'));
+CREATE DOMAIN IDENTIFIER AS VARCHAR(200);
+CREATE DOMAIN DATA_SET_KIND AS VARCHAR(40) CHECK (VALUE IN ('PHYSICAL', 'LINK', 'CONTAINER'));
+CREATE DOMAIN PLUGIN_TYPE AS VARCHAR(40) CHECK (VALUE IN ('JYTHON', 'PREDEPLOYED'));
+CREATE DOMAIN OPERATION_EXECUTION_STATE AS VARCHAR(40) CHECK (VALUE IN ('NEW', 'SCHEDULED', 'RUNNING', 'FINISHED', 'FAILED'));
+CREATE DOMAIN OPERATION_EXECUTION_AVAILABILITY AS VARCHAR(40) CHECK (VALUE IN ('AVAILABLE','DELETE_PENDING','DELETED','TIME_OUT_PENDING','TIMED_OUT'));
diff --git a/openbis/source/sql/postgresql/156/function-156.sql b/openbis/source/sql/postgresql/156/function-156.sql
new file mode 100644
index 0000000000000000000000000000000000000000..73f10255000e8d6a89aa7f535e71836252260a1e
--- /dev/null
+++ b/openbis/source/sql/postgresql/156/function-156.sql
@@ -0,0 +1,2039 @@
+-- Creating Functions
+
+------------------------------------------------------------------------------------
+--  Purpose:  Create function RENAME_SEQUENCE() that is required for renaming the sequences belonging to tables
+------------------------------------------------------------------------------------
+CREATE FUNCTION RENAME_SEQUENCE(OLD_NAME VARCHAR, NEW_NAME VARCHAR) RETURNS INTEGER AS $$
+DECLARE
+  CURR_SEQ_VAL   INTEGER;
+BEGIN
+  SELECT INTO CURR_SEQ_VAL NEXTVAL(OLD_NAME);
+  EXECUTE 'CREATE SEQUENCE ' || NEW_NAME || ' START WITH ' || CURR_SEQ_VAL;
+  EXECUTE 'DROP SEQUENCE ' || OLD_NAME;
+  RETURN CURR_SEQ_VAL;
+END;
+$$ LANGUAGE 'plpgsql';
+
+
+------------------------------------------------------------------------------------
+--  Purpose:  Create trigger CONTROLLED_VOCABULARY_CHECK 
+------------------------------------------------------------------------------------
+
+CREATE OR REPLACE FUNCTION CONTROLLED_VOCABULARY_CHECK() RETURNS trigger AS $$
+DECLARE
+   v_code  CODE;
+BEGIN
+
+   select code into v_code from data_types where id = NEW.daty_id;
+
+   -- Check if the data is of type "CONTROLLEDVOCABULARY"
+   if v_code = 'CONTROLLEDVOCABULARY' then
+      if NEW.covo_id IS NULL then
+         RAISE EXCEPTION 'Insert/Update of Property Type (Code: %) failed, as its Data Type is CONTROLLEDVOCABULARY, but it is not linked to a Controlled Vocabulary.', NEW.code;
+      end if;
+   end if;
+
+   RETURN NEW;
+
+END;
+$$ LANGUAGE 'plpgsql';
+
+CREATE TRIGGER CONTROLLED_VOCABULARY_CHECK BEFORE INSERT OR UPDATE ON PROPERTY_TYPES
+    FOR EACH ROW EXECUTE PROCEDURE CONTROLLED_VOCABULARY_CHECK();
+
+
+------------------------------------------------------------------------------------
+--  Purpose:  Create trigger EXTERNAL_DATA_STORAGE_FORMAT_CHECK 
+------------------------------------------------------------------------------------
+
+CREATE OR REPLACE FUNCTION EXTERNAL_DATA_STORAGE_FORMAT_CHECK() RETURNS trigger AS $$
+DECLARE
+   v_covo_code  CODE;
+   data_code CODE;
+BEGIN
+
+   select code into v_covo_code from controlled_vocabularies
+      where is_internal_namespace = true and 
+         id = (select covo_id from controlled_vocabulary_terms where id = NEW.cvte_id_stor_fmt);
+   -- Check if the data storage format is a term of the controlled vocabulary "STORAGE_FORMAT"
+   if v_covo_code != 'STORAGE_FORMAT' then
+      select code into data_code from data_all where id = NEW.data_id; 
+      RAISE EXCEPTION 'Insert/Update of Data (Code: %) failed, as its Storage Format is %, but is required to be STORAGE_FORMAT.', data_code, v_covo_code;
+   end if;
+
+   RETURN NEW;
+
+END;
+$$ LANGUAGE 'plpgsql';
+
+CREATE TRIGGER EXTERNAL_DATA_STORAGE_FORMAT_CHECK BEFORE INSERT OR UPDATE ON EXTERNAL_DATA
+    FOR EACH ROW EXECUTE PROCEDURE EXTERNAL_DATA_STORAGE_FORMAT_CHECK();
+
+   
+------------------------------------------------------------------------------------
+--  Purpose:  Create triggers for checking sample code uniqueness 
+------------------------------------------------------------------------------------
+
+    
+CREATE OR REPLACE FUNCTION sample_fill_code_unique_check()
+  RETURNS trigger AS
+$BODY$
+BEGIN
+  NEW.code_unique_check = NEW.code || ',' || coalesce(NEW.samp_id_part_of, -1) || ',' || coalesce(NEW.proj_id, -1) || ',' || coalesce(NEW.space_id, -1);
+  RETURN NEW;
+END;
+$BODY$
+  LANGUAGE 'plpgsql';
+
+  
+  
+CREATE OR REPLACE FUNCTION sample_fill_subcode_unique_check()
+  RETURNS trigger AS
+$BODY$
+DECLARE
+    unique_subcode  BOOLEAN_CHAR;
+BEGIN
+    SELECT is_subcode_unique into unique_subcode FROM sample_types WHERE id = NEW.saty_id;
+    
+    IF (unique_subcode) THEN
+    NEW.subcode_unique_check = NEW.code || ',' || coalesce(NEW.saty_id, -1) || ',' || coalesce(NEW.proj_id, -1) || ',' || coalesce(NEW.space_id, -1);
+    ELSE
+    NEW.subcode_unique_check = NULL;
+  END IF;
+  
+  RETURN NEW;
+END;
+$BODY$
+  LANGUAGE 'plpgsql';
+
+CREATE OR REPLACE FUNCTION disable_project_level_samples()
+  RETURNS trigger AS
+$BODY$
+BEGIN
+    IF (NEW.proj_id IS NOT NULL) THEN
+    RAISE EXCEPTION 'Project level samples are disabled';
+  END IF;
+  
+  RETURN NEW;
+END;
+$BODY$
+  LANGUAGE 'plpgsql';
+  
+  
+CREATE OR REPLACE FUNCTION sample_type_fill_subcode_unique_check()
+  RETURNS trigger AS
+$BODY$
+BEGIN
+    IF (NEW.is_subcode_unique::boolean <> OLD.is_subcode_unique::boolean) THEN
+      UPDATE samples_all SET subcode_unique_check = subcode_unique_check WHERE saty_id = NEW.id;
+  END IF;
+    RETURN NEW;
+END;
+$BODY$
+  LANGUAGE 'plpgsql';
+
+  
+CREATE TRIGGER sample_fill_code_unique_check
+  BEFORE INSERT OR UPDATE
+  ON samples_all
+  FOR EACH ROW
+  EXECUTE PROCEDURE sample_fill_code_unique_check();
+
+CREATE TRIGGER disable_project_level_samples
+  BEFORE INSERT OR UPDATE
+  ON samples_all
+  FOR EACH ROW
+  EXECUTE PROCEDURE disable_project_level_samples();
+
+
+CREATE TRIGGER sample_fill_subcode_unique_check
+  BEFORE INSERT OR UPDATE
+  ON samples_all
+  FOR EACH ROW
+  EXECUTE PROCEDURE sample_fill_subcode_unique_check();
+  
+CREATE TRIGGER sample_type_fill_subcode_unique_check
+  AFTER UPDATE
+  ON sample_types
+  FOR EACH ROW
+  EXECUTE PROCEDURE sample_type_fill_subcode_unique_check();
+    
+---------------------------------------------------------------------------------------
+--  Purpose: trigger for data sets: They should be linked to an experiment or a sample with space
+---------------------------------------------------------------------------------------
+CREATE OR REPLACE FUNCTION data_exp_or_sample_link_check() RETURNS trigger AS $$
+DECLARE
+  space_id CODE;
+  sample_code CODE;
+BEGIN
+  if NEW.expe_id IS NOT NULL then
+    RETURN NEW;
+  end if;
+  if NEW.samp_id IS NULL then
+    RAISE EXCEPTION 'Neither experiment nor sample is specified for data set %', NEW.code;
+  end if;
+  select s.id, s.code into space_id, sample_code from samples_all s where s.id = NEW.samp_id;
+  if space_id is NULL then
+    RAISE EXCEPTION 'Sample % is a shared sample.', sample_code;
+  end if;
+  RETURN NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+
+CREATE TRIGGER data_exp_or_sample_link_check BEFORE INSERT OR UPDATE ON data_all
+FOR EACH ROW EXECUTE PROCEDURE data_exp_or_sample_link_check();
+  
+------------------------------------------------------------------------------------
+--  Purpose:  Create trigger MATERIAL/SAMPLE/EXPERIMENT/DATA_SET _PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK
+--            It checks that if material property value is assigned to the entity,
+--						then the material type is equal to the one described by property type.
+------------------------------------------------------------------------------------
+
+CREATE OR REPLACE FUNCTION MATERIAL_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK() RETURNS trigger AS $$
+DECLARE
+   v_type_id  CODE;
+   v_type_id_prop  CODE;
+BEGIN
+   if NEW.mate_prop_id IS NOT NULL then
+			-- find material type id of the property type 
+			select pt.maty_prop_id into v_type_id_prop 
+			  from material_type_property_types etpt, property_types pt 
+			 where NEW.mtpt_id = etpt.id AND etpt.prty_id = pt.id;
+		
+			if v_type_id_prop IS NOT NULL then
+				-- find material type id of the material which consists the entity's property value
+				select entity.maty_id into v_type_id 
+				  from materials entity
+				 where NEW.mate_prop_id = entity.id;
+				if v_type_id != v_type_id_prop then
+					RAISE EXCEPTION 'Insert/Update of property value referencing material (id: %) failed, as referenced material type is different than expected (id %, expected id: %).', 
+							 NEW.mate_prop_id, v_type_id, v_type_id_prop;
+				end if;
+			end if;
+   end if;
+   RETURN NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+
+CREATE TRIGGER MATERIAL_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK BEFORE INSERT OR UPDATE ON material_properties
+    FOR EACH ROW EXECUTE PROCEDURE MATERIAL_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK();
+    
+CREATE OR REPLACE FUNCTION SAMPLE_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK() RETURNS trigger AS $$
+DECLARE
+   v_type_id  CODE;
+   v_type_id_prop  CODE;
+BEGIN
+   if NEW.mate_prop_id IS NOT NULL then
+			-- find material type id of the property type 
+			select pt.maty_prop_id into v_type_id_prop 
+			  from sample_type_property_types etpt, property_types pt 
+			 where NEW.stpt_id = etpt.id AND etpt.prty_id = pt.id;
+		
+			if v_type_id_prop IS NOT NULL then
+				-- find material type id of the material which consists the entity's property value
+				select entity.maty_id into v_type_id 
+				  from materials entity
+				 where NEW.mate_prop_id = entity.id;
+				if v_type_id != v_type_id_prop then
+					RAISE EXCEPTION 'Insert/Update of property value referencing material (id: %) failed, as referenced material type is different than expected (id %, expected id: %).', 
+												 NEW.mate_prop_id, v_type_id, v_type_id_prop;
+				end if;
+			end if;
+   end if;
+   RETURN NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+
+CREATE TRIGGER SAMPLE_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK BEFORE INSERT OR UPDATE ON sample_properties
+    FOR EACH ROW EXECUTE PROCEDURE SAMPLE_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK();
+    
+CREATE OR REPLACE FUNCTION EXPERIMENT_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK() RETURNS trigger AS $$
+DECLARE
+   v_type_id  CODE;
+   v_type_id_prop  CODE;
+BEGIN
+   if NEW.mate_prop_id IS NOT NULL then
+			-- find material type id of the property type 
+			select pt.maty_prop_id into v_type_id_prop 
+			  from experiment_type_property_types etpt, property_types pt 
+			 where NEW.etpt_id = etpt.id AND etpt.prty_id = pt.id;
+		
+			if v_type_id_prop IS NOT NULL then
+				-- find material type id of the material which consists the entity's property value
+				select entity.maty_id into v_type_id 
+				  from materials entity
+				 where NEW.mate_prop_id = entity.id;
+				if v_type_id != v_type_id_prop then
+					RAISE EXCEPTION 'Insert/Update of property value referencing material (id: %) failed, as referenced material type is different than expected (id %, expected id: %).', 
+												 NEW.mate_prop_id, v_type_id, v_type_id_prop;
+				end if;
+			end if;
+   end if;
+   RETURN NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+
+CREATE TRIGGER EXPERIMENT_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK BEFORE INSERT OR UPDATE ON experiment_properties
+    FOR EACH ROW EXECUTE PROCEDURE EXPERIMENT_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK();
+ 
+ -- data set
+CREATE OR REPLACE FUNCTION DATA_SET_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK() RETURNS trigger AS $$
+DECLARE
+   v_type_id  CODE;
+   v_type_id_prop  CODE;
+BEGIN
+   if NEW.mate_prop_id IS NOT NULL then
+			-- find material type id of the property type 
+			select pt.maty_prop_id into v_type_id_prop 
+			  from data_set_type_property_types dstpt, property_types pt 
+			 where NEW.dstpt_id = dstpt.id AND dstpt.prty_id = pt.id;
+		
+			if v_type_id_prop IS NOT NULL then
+				-- find material type id of the material which consists the entity's property value
+				select entity.maty_id into v_type_id 
+				  from materials entity
+				 where NEW.mate_prop_id = entity.id;
+				if v_type_id != v_type_id_prop then
+					RAISE EXCEPTION 'Insert/Update of property value referencing material (id: %) failed, as referenced material type is different than expected (id %, expected id: %).', 
+												 NEW.mate_prop_id, v_type_id, v_type_id_prop;
+				end if;
+			end if;
+   end if;
+   RETURN NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+
+CREATE TRIGGER DATA_SET_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK BEFORE INSERT OR UPDATE ON data_set_properties
+    FOR EACH ROW EXECUTE PROCEDURE DATA_SET_PROPERTY_WITH_MATERIAL_DATA_TYPE_CHECK();
+    
+----------------------------------------------------------------------------------------------------
+-- Purpose: Create DEFERRED triggers for checking consistency of deletion state.
+----------------------------------------------------------------------------------------------------
+-- utility function describing a deletion
+
+CREATE OR REPLACE FUNCTION deletion_description(del_id TECH_ID) RETURNS VARCHAR AS $$
+DECLARE
+  del_person VARCHAR;
+  del_date VARCHAR;
+  del_reason VARCHAR;
+BEGIN
+  SELECT p.last_name || ' ' || p.first_name || ' (' || p.email || ')', 
+         to_char(d.registration_timestamp, 'YYYY-MM-DD HH:MM:SS'), d.reason 
+    INTO del_person, del_date, del_reason FROM deletions d, persons p 
+    WHERE d.pers_id_registerer = p.id AND d.id = del_id;
+  RETURN 'deleted by ' || del_person || ' on ' || del_date || ' with reason: "' || del_reason || '"';
+END;
+$$ LANGUAGE 'plpgsql';
+
+----------------------------------------------------------------------------------------------------
+-- 1. data set
+--- on insert/update - deleted experiment or sample can't be connected
+---                  - parents/children relationship stays unchanged 
+
+CREATE OR REPLACE FUNCTION check_created_or_modified_data_set_owner_is_alive() RETURNS trigger AS $$
+DECLARE
+	owner_code	CODE;
+	owner_del_id	TECH_ID;
+BEGIN
+	IF (NEW.del_id IS NOT NULL) THEN
+		RETURN NEW;
+	END IF;
+
+  -- check sample
+  IF (NEW.samp_id IS NOT NULL) THEN
+  	SELECT del_id, code INTO owner_del_id, owner_code
+  	  FROM samples 
+  	  WHERE id = NEW.samp_id;
+  	IF (owner_del_id IS NOT NULL) THEN 
+			RAISE EXCEPTION 'Data Set (Code: %) cannot be connected to a Sample (Code: %) %.', 
+			                NEW.code, owner_code, deletion_description(owner_del_id);
+		END IF;
+	END IF;
+	-- check experiment
+  IF (NEW.expe_id IS NOT NULL) THEN
+		SELECT del_id, code INTO owner_del_id, owner_code
+	    FROM experiments 
+	    WHERE id = NEW.expe_id;
+	  IF (owner_del_id IS NOT NULL) THEN 
+			RAISE EXCEPTION 'Data Set (Code: %) cannot be connected to an Experiment (Code: %) %.', 
+			                NEW.code, owner_code, deletion_description(owner_del_id);
+		END IF;	
+	END IF;	
+	RETURN NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+  
+CREATE CONSTRAINT TRIGGER check_created_or_modified_data_set_owner_is_alive 
+	AFTER INSERT OR UPDATE ON data_all
+	DEFERRABLE INITIALLY DEFERRED
+	FOR EACH ROW
+	EXECUTE PROCEDURE check_created_or_modified_data_set_owner_is_alive();
+	
+----------------------------------------------------------------------------------------------------
+-- 2. sample
+--- on insert/update -> experiment can't be deleted unless the sample is deleted
+--- deletion 
+----> all directly connected data sets need to be deleted
+----> all components and children need to be deleted
+
+CREATE OR REPLACE FUNCTION check_created_or_modified_sample_owner_is_alive() RETURNS trigger AS $$
+DECLARE
+	owner_code	CODE;
+	owner_del_id	TECH_ID;
+BEGIN
+	IF (NEW.del_id IS NOT NULL) THEN
+		RETURN NEW;
+	END IF;
+
+  -- check experiment (can't be deleted)
+  IF (NEW.expe_id IS NOT NULL) THEN
+  	SELECT del_id, code INTO owner_del_id, owner_code
+  	  FROM experiments 
+  	  WHERE id = NEW.expe_id;
+  	IF (owner_del_id IS NOT NULL) THEN 
+			RAISE EXCEPTION 'Sample (Code: %) cannot be connected to an Experiment (Code: %) %.', 
+   		                NEW.code, owner_code, deletion_description(owner_del_id);
+		END IF;
+	END IF;
+	RETURN NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+  
+CREATE CONSTRAINT TRIGGER check_created_or_modified_sample_owner_is_alive 
+  AFTER INSERT OR UPDATE ON samples_all
+	DEFERRABLE INITIALLY DEFERRED
+	FOR EACH ROW
+	EXECUTE PROCEDURE check_created_or_modified_sample_owner_is_alive();
+	
+CREATE OR REPLACE FUNCTION check_deletion_consistency_on_sample_deletion() RETURNS trigger AS $$
+DECLARE
+  counter  INTEGER;
+BEGIN
+	IF (OLD.del_id IS NOT NULL OR NEW.del_id IS NULL) THEN
+		RETURN NEW;
+	END IF;
+
+  -- all directly connected data sets need to be deleted
+  -- check datasets
+	SELECT count(*) INTO counter 
+	  FROM data
+	  WHERE data.samp_id = NEW.id AND data.del_id IS NULL;
+	IF (counter > 0) THEN
+	  RAISE EXCEPTION 'Sample (Code: %) deletion failed because at least one of its data sets was not deleted.', NEW.code;
+	END IF;
+  -- all components need to be deleted
+	SELECT count(*) INTO counter 
+	  FROM samples 
+	  WHERE samples.samp_id_part_of = NEW.id AND samples.del_id IS NULL;
+	IF (counter > 0) THEN
+	  RAISE EXCEPTION 'Sample (Code: %) deletion failed because at least one of its component samples was not deleted.', NEW.code;
+	END IF;
+	RETURN NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+  
+CREATE CONSTRAINT TRIGGER check_deletion_consistency_on_sample_deletion 
+  AFTER UPDATE ON samples_all
+	DEFERRABLE INITIALLY DEFERRED
+	FOR EACH ROW 
+	EXECUTE PROCEDURE check_deletion_consistency_on_sample_deletion();	
+
+-----------------------------------------
+-- update sample relationships on revert 
+-----------------------------------------
+
+CREATE OR REPLACE FUNCTION preserve_deletion_consistency_on_sample_relationships() RETURNS trigger AS $$
+DECLARE
+  delid  TECH_ID;
+BEGIN
+	IF (NEW.del_id IS NOT NULL OR OLD.del_id IS NULL) THEN
+		RETURN NEW;
+	END IF;
+	SELECT del_id INTO delid
+		FROM SAMPLES_ALL where id = NEW.sample_id_parent;
+	IF (delid IS NOT NULL) THEN
+		NEW.del_id = delid;
+	END IF;
+	SELECT del_id INTO delid
+		FROM SAMPLES_ALL where id = NEW.sample_id_child;
+	IF (delid IS NOT NULL) THEN
+		NEW.del_id = delid;
+	END IF;
+	RETURN NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+
+CREATE TRIGGER preserve_deletion_consistency_on_sample_relationships 
+  BEFORE UPDATE ON sample_relationships_all
+	FOR EACH ROW 
+	EXECUTE PROCEDURE preserve_deletion_consistency_on_sample_relationships();
+	
+-----------------------------------------
+-- update dataset relationships on revert 
+-----------------------------------------
+CREATE OR REPLACE FUNCTION preserve_deletion_consistency_on_data_set_relationships() RETURNS trigger AS $$
+DECLARE
+  delid  TECH_ID;
+BEGIN
+	IF (NEW.del_id IS NOT NULL OR OLD.del_id IS NULL) THEN
+		RETURN NEW;
+	END IF;
+	SELECT del_id INTO delid
+		FROM DATA_ALL where id = NEW.data_id_parent;
+	IF (delid IS NOT NULL) THEN
+		NEW.del_id = delid;
+	END IF;
+	SELECT del_id INTO delid
+		FROM DATA_ALL where id = NEW.data_id_child;
+	IF (delid IS NOT NULL) THEN
+		NEW.del_id = delid;
+	END IF;
+	RETURN NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+
+CREATE TRIGGER preserve_deletion_consistency_on_data_set_relationships 
+  BEFORE UPDATE ON data_set_relationships_all
+	FOR EACH ROW 
+	EXECUTE PROCEDURE preserve_deletion_consistency_on_data_set_relationships();
+	
+----------------------------------------------------------------------------------------------------
+-- 3. experiment
+--- deletion -> all directly connected samples and data sets need to be deleted
+
+CREATE OR REPLACE FUNCTION check_deletion_consistency_on_experiment_deletion() RETURNS trigger AS $$
+DECLARE
+  counter  INTEGER;
+BEGIN
+	IF (OLD.del_id IS NOT NULL OR NEW.del_id IS NULL) THEN
+		RETURN NEW;
+	END IF;
+	
+  -- check datasets
+	SELECT count(*) INTO counter 
+	  FROM data
+	  WHERE data.expe_id = NEW.id AND data.del_id IS NULL;
+	IF (counter > 0) THEN
+	  RAISE EXCEPTION 'Experiment (Code: %) deletion failed because at least one of its data sets was not deleted.', NEW.code;
+	END IF;
+	-- check samples
+	SELECT count(*) INTO counter 
+	  FROM samples 
+	  WHERE samples.expe_id = NEW.id AND samples.del_id IS NULL;
+	IF (counter > 0) THEN
+	  RAISE EXCEPTION 'Experiment (Code: %) deletion failed because at least one of its samples was not deleted.', NEW.code;
+	END IF;
+	RETURN NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+
+CREATE CONSTRAINT TRIGGER check_deletion_consistency_on_experiment_deletion 
+  AFTER UPDATE ON experiments_all
+	DEFERRABLE INITIALLY DEFERRED
+	FOR EACH ROW 
+	EXECUTE PROCEDURE check_deletion_consistency_on_experiment_deletion();
+
+----------------------------------------------------------------------------------------------------
+-- Rules for views
+----------------------------------------------------------------------------------------------------
+CREATE OR REPLACE RULE sample_insert AS
+    ON INSERT TO samples DO INSTEAD 
+       INSERT INTO samples_all (
+         id, 
+         code, 
+         del_id,
+         orig_del,
+         expe_id,
+         proj_id,
+         modification_timestamp,
+         perm_id,
+         pers_id_registerer, 
+         pers_id_modifier, 
+         registration_timestamp, 
+         samp_id_part_of,
+         saty_id, 
+         space_id,
+         version
+       ) VALUES (
+         NEW.id, 
+         NEW.code, 
+         NEW.del_id,
+         NEW.orig_del,
+         NEW.expe_id,
+         NEW.proj_id,
+         NEW.modification_timestamp,
+         NEW.perm_id,
+         NEW.pers_id_registerer, 
+         NEW.pers_id_modifier, 
+         NEW.registration_timestamp, 
+         NEW.samp_id_part_of,
+         NEW.saty_id, 
+         NEW.space_id,
+         NEW.version
+       );
+     
+CREATE OR REPLACE RULE sample_update AS
+    ON UPDATE TO samples DO INSTEAD 
+       UPDATE samples_all
+          SET code = NEW.code,
+              del_id = NEW.del_id,
+              orig_del = NEW.orig_del,
+              expe_id = NEW.expe_id,
+              proj_id = NEW.proj_id,
+              modification_timestamp = NEW.modification_timestamp,
+              perm_id = NEW.perm_id,
+              pers_id_registerer = NEW.pers_id_registerer,
+              pers_id_modifier = NEW.pers_id_modifier,
+              registration_timestamp = NEW.registration_timestamp,
+              samp_id_part_of = NEW.samp_id_part_of,
+              saty_id = NEW.saty_id,
+              space_id = NEW.space_id,
+              version = NEW.version
+          WHERE id = NEW.id;
+     
+CREATE OR REPLACE RULE sample_delete AS
+    ON DELETE TO samples DO INSTEAD
+       DELETE FROM samples_all
+              WHERE id = OLD.id;
+              
+CREATE OR REPLACE RULE sample_deleted_update AS
+    ON UPDATE TO samples_deleted DO INSTEAD
+       UPDATE samples_all
+          SET del_id = NEW.del_id,
+              orig_del = NEW.orig_del,
+              modification_timestamp = NEW.modification_timestamp,
+              version = NEW.version
+          WHERE id = NEW.id;
+     
+CREATE OR REPLACE RULE sample_deleted_delete AS
+    ON DELETE TO samples_deleted DO INSTEAD
+       DELETE FROM samples_all
+              WHERE id = OLD.id;
+              
+----------------
+-- experiment --
+----------------
+
+CREATE OR REPLACE RULE experiment_insert AS
+  ON INSERT TO experiments DO INSTEAD 
+     INSERT INTO experiments_all (
+       id, 
+       code, 
+       del_id,
+       orig_del,
+       exty_id, 
+       is_public,
+       modification_timestamp,
+       perm_id,
+       pers_id_registerer, 
+       pers_id_modifier, 
+       proj_id,
+       registration_timestamp,
+       version
+     ) VALUES (
+       NEW.id, 
+       NEW.code, 
+       NEW.del_id,
+       NEW.orig_del,
+       NEW.exty_id, 
+       NEW.is_public,
+       NEW.modification_timestamp,
+       NEW.perm_id,
+       NEW.pers_id_registerer, 
+       NEW.pers_id_modifier, 
+       NEW.proj_id,
+       NEW.registration_timestamp,
+       NEW.version
+     );
+     
+CREATE OR REPLACE RULE experiment_update AS
+    ON UPDATE TO experiments DO INSTEAD 
+       UPDATE experiments_all
+          SET code = NEW.code,
+              del_id = NEW.del_id,
+              orig_del = NEW.orig_del,
+              exty_id = NEW.exty_id,
+              is_public = NEW.is_public,
+              modification_timestamp = NEW.modification_timestamp,
+              perm_id = NEW.perm_id,
+              pers_id_registerer = NEW.pers_id_registerer,
+              pers_id_modifier = NEW.pers_id_modifier,
+              proj_id = NEW.proj_id,
+              registration_timestamp = NEW.registration_timestamp,
+              version = NEW.version
+          WHERE id = NEW.id;
+     
+CREATE OR REPLACE RULE experiment_delete AS
+    ON DELETE TO experiments DO INSTEAD
+       DELETE FROM experiments_all
+              WHERE id = OLD.id;
+      
+CREATE OR REPLACE RULE experiments_deleted_update AS
+    ON UPDATE TO experiments_deleted DO INSTEAD 
+       UPDATE experiments_all
+          SET del_id = NEW.del_id,
+              orig_del = NEW.orig_del,
+              modification_timestamp = NEW.modification_timestamp,
+              version = NEW.version
+          WHERE id = NEW.id;
+     
+CREATE OR REPLACE RULE experiments_deleted_delete AS
+    ON DELETE TO experiments_deleted DO INSTEAD
+       DELETE FROM experiments_all
+              WHERE id = OLD.id;
+                           
+                           
+----------
+-- data --
+----------
+      
+CREATE OR REPLACE RULE data_insert AS
+  ON INSERT TO data DO INSTEAD 
+     INSERT INTO data_all (
+       id, 
+       code, 
+       del_id,
+       orig_del,
+       expe_id,
+       dast_id,
+       data_producer_code,
+       dsty_id,
+       is_derived,
+       is_valid,
+       modification_timestamp,
+       access_timestamp,
+       pers_id_registerer,
+       pers_id_modifier,
+       production_timestamp,
+       registration_timestamp,
+       samp_id,
+       version
+     ) VALUES (
+       NEW.id, 
+       NEW.code, 
+       NEW.del_id, 
+       NEW.orig_del,
+       NEW.expe_id,
+       NEW.dast_id,
+       NEW.data_producer_code,
+       NEW.dsty_id,
+       NEW.is_derived, 
+       NEW.is_valid,
+       NEW.modification_timestamp,
+       NEW.access_timestamp,
+       NEW.pers_id_registerer,
+       NEW.pers_id_modifier,
+       NEW.production_timestamp,
+       NEW.registration_timestamp,
+       NEW.samp_id,
+       NEW.version
+     );
+     
+CREATE OR REPLACE RULE data_update AS
+    ON UPDATE TO data DO INSTEAD 
+       UPDATE data_all
+          SET code = NEW.code,
+              del_id = NEW.del_id,
+              orig_del = NEW.orig_del,
+              expe_id = NEW.expe_id,
+              dast_id = NEW.dast_id,
+              data_producer_code = NEW.data_producer_code,
+              dsty_id = NEW.dsty_id,
+              is_derived = NEW.is_derived,
+              is_valid = NEW.is_valid,
+              modification_timestamp = NEW.modification_timestamp,
+              access_timestamp = NEW.access_timestamp,
+              pers_id_registerer = NEW.pers_id_registerer,
+              pers_id_modifier = NEW.pers_id_modifier,
+              production_timestamp = NEW.production_timestamp,
+              registration_timestamp = NEW.registration_timestamp,
+              samp_id = NEW.samp_id,
+              version = NEW.version
+       WHERE id = NEW.id;
+              
+CREATE OR REPLACE RULE data_all AS
+    ON DELETE TO data DO INSTEAD
+       DELETE FROM data_all
+              WHERE id = OLD.id;
+              
+CREATE OR REPLACE RULE data_deleted_update AS
+    ON UPDATE TO data_deleted DO INSTEAD 
+       UPDATE data_all
+          SET del_id = NEW.del_id,
+              orig_del = NEW.orig_del,
+              modification_timestamp = NEW.modification_timestamp,
+              version = NEW.version
+          WHERE id = NEW.id;
+     
+CREATE OR REPLACE RULE data_deleted_delete AS
+    ON DELETE TO data_deleted DO INSTEAD
+       DELETE FROM data_all
+              WHERE id = OLD.id;               
+              
+
+----------------------------------------------------------------------------------------------------
+-- Rules for properties history
+----------------------------------------------------------------------------------------------------
+
+-- Material Properties --
+
+CREATE OR REPLACE RULE material_properties_update AS
+    ON UPDATE TO material_properties 
+    WHERE (OLD.VALUE IS NOT NULL AND decode(replace(substring(OLD.value from 1 for 1), '\', '\\'), 'escape') != E'\\xefbfbd' AND OLD.VALUE != NEW.VALUE) 
+        OR (OLD.CVTE_ID IS NOT NULL AND OLD.CVTE_ID != NEW.CVTE_ID) 
+        OR (OLD.MATE_PROP_ID IS NOT NULL AND OLD.MATE_PROP_ID != NEW.MATE_PROP_ID)
+    DO ALSO 
+       INSERT INTO material_properties_history (
+         ID, 
+         MATE_ID, 
+         MTPT_ID, 
+         VALUE, 
+         VOCABULARY_TERM,
+         MATERIAL, 
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP,
+         VALID_UNTIL_TIMESTAMP 
+       ) VALUES (
+         nextval('MATERIAL_PROPERTY_ID_SEQ'), 
+         OLD.MATE_ID, 
+         OLD.MTPT_ID, 
+         OLD.VALUE, 
+         (select (t.code || ' [' || v.code || ']') from controlled_vocabulary_terms as t join controlled_vocabularies as v on t.covo_id = v.id where t.id = OLD.CVTE_ID),
+         (select (m.code || ' [' || mt.code || ']') from materials as m join material_types as mt on m.maty_id = mt.id where m.id = OLD.MATE_PROP_ID),
+         OLD.PERS_ID_AUTHOR,
+         OLD.MODIFICATION_TIMESTAMP,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       
+CREATE OR REPLACE RULE material_properties_delete AS
+    ON DELETE TO material_properties 
+    WHERE (OLD.VALUE IS NOT NULL AND decode(replace(substring(OLD.value from 1 for 1), '\', '\\'), 'escape') != E'\\xefbfbd')
+        OR OLD.CVTE_ID IS NOT NULL 
+        OR OLD.MATE_PROP_ID IS NOT NULL
+    DO ALSO 
+       INSERT INTO material_properties_history (
+         ID, 
+         MATE_ID, 
+         MTPT_ID, 
+         VALUE, 
+         VOCABULARY_TERM,
+         MATERIAL, 
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP,
+         VALID_UNTIL_TIMESTAMP 
+       ) VALUES (
+         nextval('MATERIAL_PROPERTY_ID_SEQ'), 
+         OLD.MATE_ID, 
+         OLD.MTPT_ID, 
+         OLD.VALUE, 
+         (select (t.code || ' [' || v.code || ']') from controlled_vocabulary_terms as t join controlled_vocabularies as v on t.covo_id = v.id where t.id = OLD.CVTE_ID),
+         (select (m.code || ' [' || mt.code || ']') from materials as m join material_types as mt on m.maty_id = mt.id where m.id = OLD.MATE_PROP_ID),
+         OLD.PERS_ID_AUTHOR,
+         OLD.MODIFICATION_TIMESTAMP,
+         current_timestamp
+       );
+       
+-- Experiment Properties --
+
+CREATE OR REPLACE RULE experiment_properties_update AS
+    ON UPDATE TO experiment_properties 
+    WHERE (OLD.VALUE IS NOT NULL AND decode(replace(substring(OLD.value from 1 for 1), '\', '\\'), 'escape') != E'\\xefbfbd' AND OLD.VALUE != NEW.VALUE) 
+        OR (OLD.CVTE_ID IS NOT NULL AND OLD.CVTE_ID != NEW.CVTE_ID) 
+        OR (OLD.MATE_PROP_ID IS NOT NULL AND OLD.MATE_PROP_ID != NEW.MATE_PROP_ID)
+    DO ALSO 
+       INSERT INTO experiment_properties_history (
+         ID, 
+         EXPE_ID,
+         ETPT_ID, 
+         VALUE, 
+         VOCABULARY_TERM,
+         MATERIAL, 
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP,
+         VALID_UNTIL_TIMESTAMP 
+       ) VALUES (
+         nextval('EXPERIMENT_PROPERTY_ID_SEQ'), 
+         OLD.EXPE_ID, 
+         OLD.ETPT_ID, 
+         OLD.VALUE, 
+         (select (t.code || ' [' || v.code || ']') from controlled_vocabulary_terms as t join controlled_vocabularies as v on t.covo_id = v.id where t.id = OLD.CVTE_ID),
+         (select (m.code || ' [' || mt.code || ']') from materials as m join material_types as mt on m.maty_id = mt.id where m.id = OLD.MATE_PROP_ID),
+         OLD.PERS_ID_AUTHOR,
+         OLD.MODIFICATION_TIMESTAMP,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       
+CREATE OR REPLACE RULE experiment_properties_delete AS
+    ON DELETE TO experiment_properties 
+    WHERE (OLD.VALUE IS NOT NULL AND decode(replace(substring(OLD.value from 1 for 1), '\', '\\'), 'escape') != E'\\xefbfbd')
+        OR OLD.CVTE_ID IS NOT NULL 
+        OR OLD.MATE_PROP_ID IS NOT NULL
+    DO ALSO 
+       INSERT INTO experiment_properties_history (
+         ID, 
+         EXPE_ID,
+         ETPT_ID, 
+         VALUE, 
+         VOCABULARY_TERM,
+         MATERIAL, 
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP,
+         VALID_UNTIL_TIMESTAMP 
+       ) VALUES (
+         nextval('EXPERIMENT_PROPERTY_ID_SEQ'), 
+         OLD.EXPE_ID, 
+         OLD.ETPT_ID, 
+         OLD.VALUE, 
+         (select (t.code || ' [' || v.code || ']') from controlled_vocabulary_terms as t join controlled_vocabularies as v on t.covo_id = v.id where t.id = OLD.CVTE_ID),
+         (select (m.code || ' [' || mt.code || ']') from materials as m join material_types as mt on m.maty_id = mt.id where m.id = OLD.MATE_PROP_ID),
+         OLD.PERS_ID_AUTHOR,
+         OLD.MODIFICATION_TIMESTAMP,
+         current_timestamp
+       );
+       
+-- Sample Properties --
+
+CREATE OR REPLACE RULE sample_properties_update AS
+    ON UPDATE TO sample_properties
+    WHERE (OLD.VALUE IS NOT NULL AND decode(replace(substring(OLD.value from 1 for 1), '\', '\\'), 'escape') != E'\\xefbfbd' AND OLD.VALUE != NEW.VALUE) 
+        OR (OLD.CVTE_ID IS NOT NULL AND OLD.CVTE_ID != NEW.CVTE_ID) 
+        OR (OLD.MATE_PROP_ID IS NOT NULL AND OLD.MATE_PROP_ID != NEW.MATE_PROP_ID)
+    DO ALSO
+       INSERT INTO sample_properties_history (
+         ID, 
+         SAMP_ID,
+         STPT_ID, 
+         VALUE, 
+         VOCABULARY_TERM,
+         MATERIAL, 
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP,
+         VALID_UNTIL_TIMESTAMP 
+       ) VALUES (
+         nextval('SAMPLE_PROPERTY_ID_SEQ'), 
+         OLD.SAMP_ID, 
+         OLD.STPT_ID, 
+         OLD.VALUE, 
+         (select (t.code || ' [' || v.code || ']') from controlled_vocabulary_terms as t join controlled_vocabularies as v on t.covo_id = v.id where t.id = OLD.CVTE_ID),
+         (select (m.code || ' [' || mt.code || ']') from materials as m join material_types as mt on m.maty_id = mt.id where m.id = OLD.MATE_PROP_ID),
+         OLD.PERS_ID_AUTHOR,
+         OLD.MODIFICATION_TIMESTAMP,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+              
+CREATE OR REPLACE RULE sample_properties_delete AS
+    ON DELETE TO sample_properties 
+    WHERE ((OLD.VALUE IS NOT NULL AND decode(replace(substring(OLD.value from 1 for 1), '\', '\\'), 'escape') != E'\\xefbfbd')
+        OR OLD.CVTE_ID IS NOT NULL 
+        OR OLD.MATE_PROP_ID IS NOT NULL)
+	   AND (SELECT DEL_ID FROM SAMPLES_ALL WHERE ID = OLD.SAMP_ID) IS NULL
+     DO ALSO
+       INSERT INTO sample_properties_history (
+         ID, 
+         SAMP_ID,
+         STPT_ID, 
+         VALUE, 
+         VOCABULARY_TERM,
+         MATERIAL, 
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP,
+         VALID_UNTIL_TIMESTAMP 
+       ) VALUES (
+         nextval('SAMPLE_PROPERTY_ID_SEQ'), 
+         OLD.SAMP_ID, 
+         OLD.STPT_ID, 
+         OLD.VALUE, 
+         (select (t.code || ' [' || v.code || ']') from controlled_vocabulary_terms as t join controlled_vocabularies as v on t.covo_id = v.id where t.id = OLD.CVTE_ID),
+         (select (m.code || ' [' || mt.code || ']') from materials as m join material_types as mt on m.maty_id = mt.id where m.id = OLD.MATE_PROP_ID),
+         OLD.PERS_ID_AUTHOR,
+         OLD.MODIFICATION_TIMESTAMP,
+         current_timestamp
+       );
+       
+-- Data Set Properties --
+
+CREATE OR REPLACE RULE data_set_properties_update AS
+    ON UPDATE TO data_set_properties 
+    WHERE (OLD.VALUE IS NOT NULL AND decode(replace(substring(OLD.value from 1 for 1), '\', '\\'), 'escape') != E'\\xefbfbd' AND OLD.VALUE != NEW.VALUE) 
+        OR (OLD.CVTE_ID IS NOT NULL AND OLD.CVTE_ID != NEW.CVTE_ID) 
+        OR (OLD.MATE_PROP_ID IS NOT NULL AND OLD.MATE_PROP_ID != NEW.MATE_PROP_ID)
+    DO ALSO
+       INSERT INTO data_set_properties_history (
+         ID, 
+         DS_ID,
+         DSTPT_ID, 
+         VALUE, 
+         VOCABULARY_TERM,
+         MATERIAL, 
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP,
+         VALID_UNTIL_TIMESTAMP 
+       ) VALUES (
+         nextval('DATA_SET_PROPERTY_ID_SEQ'), 
+         OLD.DS_ID, 
+         OLD.DSTPT_ID, 
+         OLD.VALUE, 
+         (select (t.code || ' [' || v.code || ']') from controlled_vocabulary_terms as t join controlled_vocabularies as v on t.covo_id = v.id where t.id = OLD.CVTE_ID),
+         (select (m.code || ' [' || mt.code || ']') from materials as m join material_types as mt on m.maty_id = mt.id where m.id = OLD.MATE_PROP_ID),
+         OLD.PERS_ID_AUTHOR,
+         OLD.MODIFICATION_TIMESTAMP,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+
+CREATE OR REPLACE RULE data_set_properties_delete AS
+    ON DELETE TO data_set_properties 
+    WHERE ((OLD.VALUE IS NOT NULL AND decode(replace(substring(OLD.value from 1 for 1), '\', '\\'), 'escape') != E'\\xefbfbd')
+        OR OLD.CVTE_ID IS NOT NULL 
+        OR OLD.MATE_PROP_ID IS NOT NULL)
+	   AND (SELECT DEL_ID FROM DATA_ALL WHERE ID = OLD.DS_ID) IS NULL
+    DO ALSO
+       INSERT INTO data_set_properties_history (
+         ID, 
+         DS_ID,
+         DSTPT_ID, 
+         VALUE, 
+         VOCABULARY_TERM,
+         MATERIAL, 
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP,
+         VALID_UNTIL_TIMESTAMP 
+       ) VALUES (
+         nextval('DATA_SET_PROPERTY_ID_SEQ'), 
+         OLD.DS_ID, 
+         OLD.DSTPT_ID, 
+         OLD.VALUE, 
+         (select (t.code || ' [' || v.code || ']') from controlled_vocabulary_terms as t join controlled_vocabularies as v on t.covo_id = v.id where t.id = OLD.CVTE_ID),
+         (select (m.code || ' [' || mt.code || ']') from materials as m join material_types as mt on m.maty_id = mt.id where m.id = OLD.MATE_PROP_ID),
+         OLD.PERS_ID_AUTHOR,
+         OLD.MODIFICATION_TIMESTAMP,
+         current_timestamp
+       );
+       
+-- End of rules for properties history
+
+CREATE OR REPLACE RULE data_set_relationships_insert AS
+    ON INSERT TO data_set_relationships DO INSTEAD 
+       INSERT INTO data_set_relationships_all (
+         data_id_parent, 
+         data_id_child,
+         pers_id_author,
+         relationship_id,
+         ordinal,
+         registration_timestamp,
+         modification_timestamp
+       ) VALUES (
+         NEW.data_id_parent, 
+         NEW.data_id_child,
+         NEW.pers_id_author,
+         NEW.relationship_id,
+         NEW.ordinal,
+         NEW.registration_timestamp,
+         NEW.modification_timestamp
+       );
+
+CREATE OR REPLACE RULE data_set_relationships_update AS
+    ON UPDATE TO data_set_relationships DO INSTEAD 
+       UPDATE data_set_relationships_all
+          SET 
+            data_id_parent = NEW.data_id_parent, 
+            data_id_child = NEW.data_id_child, 
+            del_id = NEW.del_id,
+            relationship_id = NEW.relationship_id,
+            ordinal = NEW.ordinal,
+            pers_id_author = NEW.pers_id_author,
+            registration_timestamp = NEW.registration_timestamp,
+            modification_timestamp = NEW.modification_timestamp
+          WHERE data_id_parent = NEW.data_id_parent and data_id_child = NEW.data_id_child 
+                and relationship_id = NEW.relationship_id;
+          
+CREATE OR REPLACE RULE data_set_relationships_delete AS
+    ON DELETE TO data_set_relationships DO INSTEAD
+       DELETE FROM data_set_relationships_all
+              WHERE data_id_parent = OLD.data_id_parent and data_id_child = OLD.data_id_child
+                    and relationship_id = OLD.relationship_id;
+
+CREATE OR REPLACE RULE sample_relationships_insert AS
+    ON INSERT TO sample_relationships DO INSTEAD 
+       INSERT INTO sample_relationships_all (
+         id, 
+         sample_id_parent, 
+         relationship_id, 
+         sample_id_child,
+         pers_id_author,
+			   registration_timestamp,
+   	     modification_timestamp
+       ) VALUES (
+         NEW.id, 
+         NEW.sample_id_parent, 
+         NEW.relationship_id, 
+         NEW.sample_id_child,
+         NEW.pers_id_author,
+			   NEW.registration_timestamp,
+			   NEW.modification_timestamp
+       );
+       
+CREATE OR REPLACE RULE sample_relationships_update AS
+    ON UPDATE TO sample_relationships DO INSTEAD 
+       UPDATE sample_relationships_all
+          SET 
+			      sample_id_parent = NEW.sample_id_parent, 
+			      relationship_id = NEW.relationship_id, 
+			      sample_id_child = NEW.sample_id_child,
+			      del_id = NEW.del_id,
+			      pers_id_author = NEW.pers_id_author,
+			      registration_timestamp = NEW.registration_timestamp,
+			      modification_timestamp = NEW.modification_timestamp
+          WHERE id = NEW.id;
+     
+CREATE OR REPLACE RULE sample_relationships_delete AS
+    ON DELETE TO sample_relationships DO INSTEAD
+       DELETE FROM sample_relationships_all
+              WHERE id = OLD.id;
+
+CREATE OR REPLACE RULE METAPROJECT_ASSIGNMENTS_INSERT AS
+    ON INSERT TO METAPROJECT_ASSIGNMENTS DO INSTEAD 
+       INSERT INTO METAPROJECT_ASSIGNMENTS_ALL (
+         ID, 
+         MEPR_ID,
+         EXPE_ID,
+			   SAMP_ID,
+			   DATA_ID,
+			   MATE_ID,
+			   DEL_ID,
+			   CREATION_DATE
+       ) VALUES (
+         NEW.ID, 
+         NEW.MEPR_ID,
+         NEW.EXPE_ID,
+			   NEW.SAMP_ID,
+			   NEW.DATA_ID,
+			   NEW.MATE_ID,
+			   NEW.DEL_ID,
+			   NEW.CREATION_DATE
+       );
+
+CREATE OR REPLACE RULE METAPROJECT_ASSIGNMENTS_UPDATE AS
+    ON UPDATE TO METAPROJECT_ASSIGNMENTS DO INSTEAD 
+       UPDATE METAPROJECT_ASSIGNMENTS_ALL
+          SET 
+			      ID = NEW.ID, 
+         		MEPR_ID = NEW.MEPR_ID,
+         		EXPE_ID = NEW.EXPE_ID,
+			   		SAMP_ID = NEW.SAMP_ID,
+			   		DATA_ID = NEW.DATA_ID,
+			   		MATE_ID = NEW.MATE_ID,
+			   		DEL_ID = NEW.DEL_ID,
+			   		CREATION_DATE = NEW.CREATION_DATE
+          WHERE ID = NEW.ID;
+          
+CREATE OR REPLACE RULE METAPROJECT_ASSIGNMENTS_DELETE AS
+    ON DELETE TO METAPROJECT_ASSIGNMENTS DO INSTEAD
+       DELETE FROM METAPROJECT_ASSIGNMENTS_ALL
+          WHERE ID = OLD.ID;
+              
+----------------------------------------------------------------------------------------------------
+-- Rules for relationships history
+----------------------------------------------------------------------------------------------------
+
+-- sample -> experiment
+
+CREATE OR REPLACE RULE sample_experiment_update AS
+    ON UPDATE TO samples_all 
+    WHERE (OLD.EXPE_ID != NEW.EXPE_ID OR OLD.EXPE_ID IS NULL) AND NEW.EXPE_ID IS NOT NULL
+    DO ALSO (
+       UPDATE EXPERIMENT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP
+         WHERE MAIN_EXPE_ID = OLD.EXPE_ID AND SAMP_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       INSERT INTO EXPERIMENT_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_EXPE_ID,
+         RELATION_TYPE, 
+         SAMP_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('EXPERIMENT_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.EXPE_ID, 
+         'OWNER', 
+         NEW.ID, 
+         NEW.PERM_ID,
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE MAIN_SAMP_ID = OLD.ID AND EXPE_ID = OLD.EXPE_ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_SAMP_ID,
+         RELATION_TYPE, 
+         EXPE_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.EXPE_ID, 
+         (SELECT PERM_ID FROM EXPERIMENTS_ALL WHERE ID = NEW.EXPE_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+    );
+    
+CREATE OR REPLACE RULE sample_experiment_remove_update AS
+    ON UPDATE TO samples_all 
+    WHERE OLD.EXPE_ID IS NOT NULL AND NEW.EXPE_ID IS NULL
+    DO ALSO (
+       UPDATE EXPERIMENT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP
+         WHERE MAIN_EXPE_ID = OLD.EXPE_ID AND SAMP_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE MAIN_SAMP_ID = OLD.ID AND EXPE_ID = OLD.EXPE_ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+    );
+    
+CREATE OR REPLACE RULE sample_experiment_insert AS
+    ON INSERT TO samples_all 
+    WHERE NEW.EXPE_ID IS NOT NULL
+       DO ALSO (
+       INSERT INTO EXPERIMENT_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_EXPE_ID,
+         RELATION_TYPE, 
+         SAMP_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('EXPERIMENT_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.EXPE_ID, 
+         'OWNER', 
+         NEW.ID, 
+         NEW.PERM_ID,
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_SAMP_ID,
+         RELATION_TYPE, 
+         EXPE_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.EXPE_ID, 
+         (SELECT PERM_ID FROM EXPERIMENTS_ALL WHERE ID = NEW.EXPE_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+   );
+   
+CREATE OR REPLACE RULE sample_experiment_delete AS
+    ON DELETE TO samples_all 
+    WHERE OLD.EXPE_ID IS NOT NULL
+       DO ALSO 
+       UPDATE EXPERIMENT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = current_timestamp 
+         WHERE MAIN_EXPE_ID = OLD.EXPE_ID AND SAMP_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+     
+-- container samples
+       
+CREATE OR REPLACE RULE sample_container_update AS
+    ON UPDATE TO samples_all 
+    WHERE (OLD.SAMP_ID_PART_OF != NEW.SAMP_ID_PART_OF OR OLD.SAMP_ID_PART_OF IS NULL) AND NEW.SAMP_ID_PART_OF IS NOT NULL
+    DO ALSO (
+       UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE (MAIN_SAMP_ID = OLD.SAMP_ID_PART_OF AND SAMP_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL AND RELATION_TYPE = 'CONTAINER')
+           OR (MAIN_SAMP_ID = OLD.ID AND SAMP_ID = OLD.SAMP_ID_PART_OF AND VALID_UNTIL_TIMESTAMP IS NULL AND RELATION_TYPE = 'CONTAINED');
+       INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_SAMP_ID,
+         RELATION_TYPE, 
+         SAMP_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.SAMP_ID_PART_OF, 
+         'CONTAINER', 
+         NEW.ID, 
+         NEW.PERM_ID,
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_SAMP_ID,
+         RELATION_TYPE, 
+         SAMP_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'CONTAINED', 
+         NEW.SAMP_ID_PART_OF, 
+         (SELECT PERM_ID FROM SAMPLES_ALL WHERE ID = NEW.SAMP_ID_PART_OF),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+    );
+    
+CREATE OR REPLACE RULE sample_container_remove_update AS
+    ON UPDATE TO samples_all 
+    WHERE OLD.SAMP_ID_PART_OF IS NOT NULL AND NEW.SAMP_ID_PART_OF IS NULL
+    DO ALSO (
+       UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE (MAIN_SAMP_ID = OLD.SAMP_ID_PART_OF AND SAMP_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL AND RELATION_TYPE = 'CONTAINER')
+           OR (MAIN_SAMP_ID = OLD.ID AND SAMP_ID = OLD.SAMP_ID_PART_OF AND VALID_UNTIL_TIMESTAMP IS NULL AND RELATION_TYPE = 'CONTAINED');
+    );
+    
+CREATE OR REPLACE RULE sample_container_insert AS
+    ON INSERT TO samples_all 
+    WHERE NEW.SAMP_ID_PART_OF IS NOT NULL
+       DO ALSO (
+       INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_SAMP_ID,
+         RELATION_TYPE, 
+         SAMP_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.SAMP_ID_PART_OF, 
+         'CONTAINER', 
+         NEW.ID, 
+         NEW.PERM_ID,
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_SAMP_ID,
+         RELATION_TYPE, 
+         SAMP_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'CONTAINED', 
+         NEW.SAMP_ID_PART_OF, 
+         (SELECT PERM_ID FROM SAMPLES_ALL WHERE ID = NEW.SAMP_ID_PART_OF),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+   );
+   
+CREATE OR REPLACE RULE sample_container_delete AS
+    ON DELETE TO samples_all 
+    WHERE OLD.SAMP_ID_PART_OF IS NOT NULL
+       DO ALSO 
+       UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = current_timestamp 
+         WHERE MAIN_SAMP_ID = OLD.SAMP_ID_PART_OF AND SAMP_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL AND RELATION_TYPE = 'CONTAINER';
+
+-- dataset -> eperiment
+
+CREATE OR REPLACE RULE dataset_experiment_update AS
+    ON UPDATE TO data_all 
+    WHERE (OLD.EXPE_ID != NEW.EXPE_ID OR OLD.SAMP_ID IS NOT NULL) AND NEW.SAMP_ID IS NULL
+    DO ALSO (
+       UPDATE EXPERIMENT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP
+         WHERE MAIN_EXPE_ID = OLD.EXPE_ID AND DATA_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       INSERT INTO EXPERIMENT_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_EXPE_ID,
+         RELATION_TYPE, 
+         DATA_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('EXPERIMENT_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.EXPE_ID, 
+         'OWNER', 
+         NEW.ID, 
+         NEW.CODE,
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       UPDATE DATA_SET_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE (MAIN_DATA_ID = OLD.ID AND EXPE_ID = OLD.EXPE_ID AND VALID_UNTIL_TIMESTAMP IS NULL);
+       INSERT INTO DATA_SET_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_DATA_ID,
+         RELATION_TYPE, 
+         EXPE_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('DATA_SET_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.EXPE_ID, 
+         (SELECT PERM_ID FROM EXPERIMENTS_ALL WHERE ID = NEW.EXPE_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+    );
+    
+CREATE OR REPLACE RULE dataset_experiment_remove_update AS
+    ON UPDATE TO data_all 
+    WHERE OLD.SAMP_ID IS NULL AND NEW.SAMP_ID IS NOT NULL
+    DO ALSO (
+       UPDATE EXPERIMENT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP
+         WHERE MAIN_EXPE_ID = OLD.EXPE_ID AND DATA_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       UPDATE DATA_SET_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE MAIN_DATA_ID = OLD.ID AND EXPE_ID = OLD.EXPE_ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+    );
+    
+CREATE OR REPLACE RULE dataset_experiment_insert AS
+    ON INSERT TO data_all 
+    WHERE NEW.EXPE_ID IS NOT NULL AND NEW.SAMP_ID IS NULL
+       DO ALSO (
+       INSERT INTO EXPERIMENT_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_EXPE_ID,
+         RELATION_TYPE, 
+         DATA_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('EXPERIMENT_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.EXPE_ID, 
+         'OWNER', 
+         NEW.ID, 
+         NEW.CODE,
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       INSERT INTO DATA_SET_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_DATA_ID,
+         RELATION_TYPE, 
+         EXPE_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('DATA_SET_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.EXPE_ID, 
+         (SELECT PERM_ID FROM EXPERIMENTS_ALL WHERE ID = NEW.EXPE_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+   );
+   
+CREATE OR REPLACE RULE dataset_experiment_delete AS
+    ON DELETE TO data_all 
+    WHERE OLD.EXPE_ID IS NOT NULL AND OLD.SAMP_ID IS NULL
+       DO ALSO 
+       UPDATE EXPERIMENT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = current_timestamp 
+         WHERE MAIN_EXPE_ID = OLD.EXPE_ID AND DATA_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+
+-- dataset -> sample
+
+CREATE OR REPLACE RULE dataset_sample_update AS
+    ON UPDATE TO data_all 
+    WHERE (OLD.SAMP_ID != NEW.SAMP_ID OR OLD.SAMP_ID IS NULL) AND NEW.SAMP_ID IS NOT NULL
+    DO ALSO (
+       UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP
+         WHERE MAIN_SAMP_ID = OLD.SAMP_ID AND DATA_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_SAMP_ID,
+         RELATION_TYPE, 
+         DATA_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.SAMP_ID, 
+         'OWNER', 
+         NEW.ID, 
+         NEW.CODE,
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       UPDATE DATA_SET_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE (MAIN_DATA_ID = OLD.ID AND SAMP_ID = OLD.SAMP_ID AND VALID_UNTIL_TIMESTAMP IS NULL);
+       INSERT INTO DATA_SET_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_DATA_ID,
+         RELATION_TYPE, 
+         SAMP_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('DATA_SET_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.SAMP_ID, 
+         (SELECT PERM_ID FROM SAMPLES_ALL WHERE ID = NEW.SAMP_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+    );
+    
+CREATE OR REPLACE RULE dataset_sample_remove_update AS
+    ON UPDATE TO data_all 
+    WHERE OLD.SAMP_ID IS NOT NULL AND NEW.SAMP_ID IS NULL
+    DO ALSO (
+       UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP
+         WHERE MAIN_SAMP_ID = OLD.SAMP_ID AND DATA_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       UPDATE DATA_SET_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE MAIN_DATA_ID = OLD.ID AND SAMP_ID = OLD.SAMP_ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+    );
+    
+CREATE OR REPLACE RULE dataset_sample_insert AS
+    ON INSERT TO data_all 
+    WHERE NEW.SAMP_ID IS NOT NULL
+       DO ALSO (
+       INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_SAMP_ID,
+         RELATION_TYPE, 
+         DATA_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.SAMP_ID, 
+         'OWNER', 
+         NEW.ID, 
+         NEW.CODE,
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       INSERT INTO DATA_SET_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_DATA_ID,
+         RELATION_TYPE, 
+         SAMP_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('DATA_SET_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.SAMP_ID, 
+         (SELECT PERM_ID FROM SAMPLES_ALL WHERE ID = NEW.SAMP_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+   );
+   
+CREATE OR REPLACE RULE dataset_sample_delete AS
+    ON DELETE TO data_all 
+    WHERE OLD.SAMP_ID IS NOT NULL
+       DO ALSO 
+       UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = current_timestamp 
+         WHERE MAIN_SAMP_ID = OLD.SAMP_ID AND DATA_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+
+-- data set relationship
+
+CREATE OR REPLACE RULE data_relationship_insert AS
+    ON INSERT TO data_set_relationships_all
+    WHERE NEW.DEL_ID IS NULL
+       DO ALSO (
+         INSERT INTO DATA_SET_RELATIONSHIPS_HISTORY (
+           ID, 
+           MAIN_DATA_ID,
+           RELATION_TYPE, 
+           DATA_ID, 
+           ENTITY_PERM_ID,
+           PERS_ID_AUTHOR,
+           VALID_FROM_TIMESTAMP,
+           ORDINAL
+         ) VALUES (
+           nextval('DATA_SET_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+           NEW.DATA_ID_PARENT, 
+           (SELECT UPPER(PARENT_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = NEW.RELATIONSHIP_ID), 
+           NEW.DATA_ID_CHILD, 
+           (SELECT CODE FROM data_all WHERE ID = NEW.DATA_ID_CHILD),
+           NEW.PERS_ID_AUTHOR,
+           NEW.MODIFICATION_TIMESTAMP,
+           NEW.ORDINAL
+         );
+         INSERT INTO DATA_SET_RELATIONSHIPS_HISTORY (
+           ID, 
+           MAIN_DATA_ID,
+           RELATION_TYPE, 
+           DATA_ID, 
+           ENTITY_PERM_ID,
+           PERS_ID_AUTHOR,
+           VALID_FROM_TIMESTAMP,
+           ORDINAL
+         ) VALUES (
+           nextval('DATA_SET_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+           NEW.DATA_ID_CHILD, 
+           (SELECT UPPER(CHILD_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = NEW.RELATIONSHIP_ID), 
+           NEW.DATA_ID_PARENT, 
+           (SELECT CODE FROM data_all WHERE ID = NEW.DATA_ID_PARENT),
+           NEW.PERS_ID_AUTHOR,
+           NEW.MODIFICATION_TIMESTAMP,
+           NEW.ORDINAL
+         );
+       );
+
+CREATE OR REPLACE RULE data_relationship_delete AS
+    ON DELETE TO data_set_relationships_all
+    WHERE OLD.DEL_ID IS NULL
+       DO ALSO (
+         UPDATE DATA_SET_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = current_timestamp
+           WHERE (MAIN_DATA_ID = OLD.DATA_ID_PARENT 
+                  AND DATA_ID = OLD.DATA_ID_CHILD
+                  AND RELATION_TYPE = (SELECT UPPER(PARENT_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = OLD.RELATIONSHIP_ID)
+                  AND VALID_UNTIL_TIMESTAMP IS NULL)
+             OR (MAIN_DATA_ID = OLD.DATA_ID_CHILD 
+                 AND DATA_ID = OLD.DATA_ID_PARENT 
+                 AND RELATION_TYPE = (SELECT UPPER(CHILD_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = OLD.RELATIONSHIP_ID)
+                 AND VALID_UNTIL_TIMESTAMP IS NULL);
+       );
+       
+CREATE OR REPLACE RULE data_relationship_update AS
+    ON UPDATE TO data_set_relationships_all
+    WHERE NEW.DEL_ID IS NULL AND OLD.DEL_ID IS NULL
+       DO ALSO (
+         UPDATE DATA_SET_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = current_timestamp
+           WHERE (MAIN_DATA_ID = OLD.DATA_ID_PARENT 
+                  AND DATA_ID = OLD.DATA_ID_CHILD
+                  AND RELATION_TYPE = (SELECT UPPER(PARENT_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = OLD.RELATIONSHIP_ID)
+                  AND VALID_UNTIL_TIMESTAMP IS NULL)
+             OR (MAIN_DATA_ID = OLD.DATA_ID_CHILD 
+                 AND DATA_ID = OLD.DATA_ID_PARENT 
+                 AND RELATION_TYPE = (SELECT UPPER(CHILD_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = OLD.RELATIONSHIP_ID)
+                 AND VALID_UNTIL_TIMESTAMP IS NULL);
+         INSERT INTO DATA_SET_RELATIONSHIPS_HISTORY (
+           ID, 
+           MAIN_DATA_ID,
+           RELATION_TYPE, 
+           DATA_ID, 
+           ENTITY_PERM_ID,
+           PERS_ID_AUTHOR,
+           VALID_FROM_TIMESTAMP,
+           ORDINAL
+         ) VALUES (
+           nextval('DATA_SET_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+           NEW.DATA_ID_PARENT, 
+           (SELECT UPPER(PARENT_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = NEW.RELATIONSHIP_ID), 
+           NEW.DATA_ID_CHILD, 
+           (SELECT CODE FROM data_all WHERE ID = NEW.DATA_ID_CHILD),
+           NEW.PERS_ID_AUTHOR,
+           NEW.MODIFICATION_TIMESTAMP,
+           NEW.ORDINAL
+         );
+         INSERT INTO DATA_SET_RELATIONSHIPS_HISTORY (
+           ID, 
+           MAIN_DATA_ID,
+           RELATION_TYPE, 
+           DATA_ID, 
+           ENTITY_PERM_ID,
+           PERS_ID_AUTHOR,
+           VALID_FROM_TIMESTAMP,
+           ORDINAL
+         ) VALUES (
+           nextval('DATA_SET_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+           NEW.DATA_ID_CHILD, 
+           (SELECT UPPER(CHILD_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = NEW.RELATIONSHIP_ID), 
+           NEW.DATA_ID_PARENT, 
+           (SELECT CODE FROM data_all WHERE ID = NEW.DATA_ID_PARENT),
+           NEW.PERS_ID_AUTHOR,
+           NEW.MODIFICATION_TIMESTAMP,
+           NEW.ORDINAL
+         );
+       );
+       
+CREATE OR REPLACE RULE data_relationship_trash_update AS
+    ON UPDATE TO data_set_relationships_all
+    WHERE NEW.DEL_ID IS NOT NULL AND OLD.DEL_ID IS NULL
+       DO ALSO (
+         UPDATE DATA_SET_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = current_timestamp
+           WHERE (MAIN_DATA_ID = OLD.DATA_ID_PARENT 
+                  AND DATA_ID = OLD.DATA_ID_CHILD
+                  AND RELATION_TYPE = (SELECT UPPER(PARENT_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = OLD.RELATIONSHIP_ID)
+                  AND VALID_UNTIL_TIMESTAMP IS NULL)
+             OR (MAIN_DATA_ID = OLD.DATA_ID_CHILD 
+                 AND DATA_ID = OLD.DATA_ID_PARENT 
+                 AND RELATION_TYPE = (SELECT UPPER(CHILD_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = OLD.RELATIONSHIP_ID)
+                 AND VALID_UNTIL_TIMESTAMP IS NULL);
+       );
+       
+CREATE OR REPLACE RULE data_relationship_trash_revert_update AS
+    ON UPDATE TO data_set_relationships_all
+    WHERE OLD.DEL_ID IS NOT NULL AND NEW.DEL_ID IS NULL
+       DO ALSO (
+         INSERT INTO DATA_SET_RELATIONSHIPS_HISTORY (
+           ID, 
+           MAIN_DATA_ID,
+           RELATION_TYPE, 
+           DATA_ID, 
+           ENTITY_PERM_ID,
+           PERS_ID_AUTHOR,
+           VALID_FROM_TIMESTAMP,
+           ORDINAL
+         ) VALUES (
+           nextval('DATA_SET_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+           NEW.DATA_ID_PARENT, 
+           (SELECT UPPER(PARENT_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = NEW.RELATIONSHIP_ID), 
+           NEW.DATA_ID_CHILD, 
+           (SELECT CODE FROM data_all WHERE ID = NEW.DATA_ID_CHILD),
+           NEW.PERS_ID_AUTHOR,
+           NEW.MODIFICATION_TIMESTAMP,
+           NEW.ORDINAL
+         );
+         INSERT INTO DATA_SET_RELATIONSHIPS_HISTORY (
+           ID, 
+           MAIN_DATA_ID,
+           RELATION_TYPE, 
+           DATA_ID, 
+           ENTITY_PERM_ID,
+           PERS_ID_AUTHOR,
+           VALID_FROM_TIMESTAMP,
+           ORDINAL
+         ) VALUES (
+           nextval('DATA_SET_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+           NEW.DATA_ID_CHILD, 
+           (SELECT UPPER(CHILD_LABEL) FROM RELATIONSHIP_TYPES WHERE ID = NEW.RELATIONSHIP_ID), 
+           NEW.DATA_ID_PARENT, 
+           (SELECT CODE FROM data_all WHERE ID = NEW.DATA_ID_PARENT),
+           NEW.PERS_ID_AUTHOR,
+           NEW.MODIFICATION_TIMESTAMP,
+           NEW.ORDINAL
+         );
+       );
+
+-- samples parent-child relationship
+
+CREATE OR REPLACE RULE sample_parent_child_insert AS
+    ON INSERT TO sample_relationships_all
+    WHERE NEW.DEL_ID IS NULL
+       DO ALSO (
+         INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+           ID, 
+           MAIN_SAMP_ID,
+           RELATION_TYPE, 
+           SAMP_ID, 
+           ENTITY_PERM_ID,
+           PERS_ID_AUTHOR,
+           VALID_FROM_TIMESTAMP
+         ) VALUES (
+           nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+           NEW.SAMPLE_ID_PARENT, 
+           'PARENT', 
+           NEW.SAMPLE_ID_CHILD, 
+           (SELECT PERM_ID FROM samples_all WHERE ID = NEW.SAMPLE_ID_CHILD),
+           NEW.PERS_ID_AUTHOR,
+           NEW.MODIFICATION_TIMESTAMP
+         );
+         INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+           ID, 
+           MAIN_SAMP_ID,
+           RELATION_TYPE, 
+           SAMP_ID, 
+           ENTITY_PERM_ID,
+           PERS_ID_AUTHOR,
+           VALID_FROM_TIMESTAMP
+         ) VALUES (
+           nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+           NEW.SAMPLE_ID_CHILD, 
+           'CHILD', 
+           NEW.SAMPLE_ID_PARENT, 
+           (SELECT PERM_ID FROM samples_all WHERE ID = NEW.SAMPLE_ID_PARENT),
+           NEW.PERS_ID_AUTHOR,
+           NEW.MODIFICATION_TIMESTAMP
+         );
+       );
+       
+CREATE OR REPLACE RULE sample_parent_child_delete AS
+    ON DELETE TO sample_relationships_all
+    WHERE OLD.DEL_ID IS NULL
+       DO ALSO (
+         UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = current_timestamp
+           WHERE (MAIN_SAMP_ID = OLD.SAMPLE_ID_PARENT AND SAMP_ID = OLD.SAMPLE_ID_CHILD AND VALID_UNTIL_TIMESTAMP IS NULL)
+             OR (MAIN_SAMP_ID = OLD.SAMPLE_ID_CHILD AND SAMP_ID = OLD.SAMPLE_ID_PARENT AND VALID_UNTIL_TIMESTAMP IS NULL);
+       );
+
+CREATE OR REPLACE RULE sample_parent_child_update AS
+    ON UPDATE TO sample_relationships_all
+    WHERE NEW.DEL_ID IS NOT NULL AND OLD.DEL_ID IS NULL
+       DO ALSO (
+         UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = current_timestamp
+           WHERE (MAIN_SAMP_ID = OLD.SAMPLE_ID_PARENT AND SAMP_ID = OLD.SAMPLE_ID_CHILD AND VALID_UNTIL_TIMESTAMP IS NULL)
+             OR (MAIN_SAMP_ID = OLD.SAMPLE_ID_CHILD AND SAMP_ID = OLD.SAMPLE_ID_PARENT AND VALID_UNTIL_TIMESTAMP IS NULL);
+       );
+
+CREATE OR REPLACE RULE sample_parent_child_revert_update AS
+    ON UPDATE TO sample_relationships_all
+    WHERE NEW.DEL_ID IS NULL AND OLD.DEL_ID IS NOT NULL
+       DO ALSO (
+         INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+           ID, 
+           MAIN_SAMP_ID,
+           RELATION_TYPE, 
+           SAMP_ID, 
+           ENTITY_PERM_ID,
+           PERS_ID_AUTHOR,
+           VALID_FROM_TIMESTAMP
+         ) VALUES (
+           nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+           NEW.SAMPLE_ID_PARENT, 
+           'PARENT', 
+           NEW.SAMPLE_ID_CHILD, 
+           (SELECT PERM_ID FROM samples_all WHERE ID = NEW.SAMPLE_ID_CHILD),
+           NEW.PERS_ID_AUTHOR,
+           NEW.MODIFICATION_TIMESTAMP
+         );
+         INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+           ID, 
+           MAIN_SAMP_ID,
+           RELATION_TYPE, 
+           SAMP_ID, 
+           ENTITY_PERM_ID,
+           PERS_ID_AUTHOR,
+           VALID_FROM_TIMESTAMP
+         ) VALUES (
+           nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+           NEW.SAMPLE_ID_CHILD, 
+           'CHILD', 
+           NEW.SAMPLE_ID_PARENT, 
+           (SELECT PERM_ID FROM samples_all WHERE ID = NEW.SAMPLE_ID_PARENT),
+           NEW.PERS_ID_AUTHOR,
+           NEW.MODIFICATION_TIMESTAMP
+         );
+       );
+
+-- experiment -> project
+
+CREATE OR REPLACE RULE experiment_project_update AS
+    ON UPDATE TO experiments_all 
+    WHERE (OLD.PROJ_ID != NEW.PROJ_ID OR OLD.PROJ_ID IS NULL) AND NEW.PROJ_ID IS NOT NULL
+    DO ALSO (
+       UPDATE PROJECT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP
+         WHERE MAIN_PROJ_ID = OLD.PROJ_ID AND EXPE_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       INSERT INTO PROJECT_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_PROJ_ID,
+         RELATION_TYPE, 
+         EXPE_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('PROJECT_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.PROJ_ID, 
+         'OWNER', 
+         NEW.ID, 
+         NEW.PERM_ID,
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       UPDATE EXPERIMENT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE MAIN_EXPE_ID = OLD.ID AND PROJ_ID = OLD.PROJ_ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       INSERT INTO EXPERIMENT_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_EXPE_ID,
+         RELATION_TYPE, 
+         PROJ_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('EXPERIMENT_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.PROJ_ID, 
+         (SELECT perm_id FROM PROJECTS WHERE ID = NEW.PROJ_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+    );
+    
+CREATE OR REPLACE RULE experiment_project_remove_update AS
+    ON UPDATE TO experiments_all 
+    WHERE OLD.PROJ_ID IS NOT NULL AND NEW.PROJ_ID IS NULL
+    DO ALSO (
+       UPDATE PROJECT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP
+         WHERE MAIN_PROJ_ID = OLD.PROJ_ID AND EXPE_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       UPDATE EXPERIMENT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE MAIN_EXPE_ID = OLD.ID AND PROJ_ID = OLD.PROJ_ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+    );
+    
+CREATE OR REPLACE RULE experiment_project_insert AS
+    ON INSERT TO experiments_all 
+    WHERE NEW.PROJ_ID IS NOT NULL
+       DO ALSO (
+       INSERT INTO PROJECT_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_PROJ_ID,
+         RELATION_TYPE, 
+         EXPE_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('PROJECT_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.PROJ_ID, 
+         'OWNER', 
+         NEW.ID, 
+         NEW.PERM_ID,
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+       INSERT INTO EXPERIMENT_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_EXPE_ID,
+         RELATION_TYPE, 
+         PROJ_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('EXPERIMENT_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.PROJ_ID, 
+         (SELECT perm_id FROM PROJECTS WHERE ID = NEW.PROJ_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+   );
+   
+CREATE OR REPLACE RULE experiment_project_delete AS
+    ON DELETE TO experiments_all 
+    WHERE OLD.PROJ_ID IS NOT NULL
+       DO ALSO 
+       UPDATE PROJECT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = current_timestamp 
+         WHERE MAIN_PROJ_ID = OLD.PROJ_ID AND EXPE_ID = OLD.ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+
+-- project -> space
+
+CREATE OR REPLACE RULE project_space_update AS
+    ON UPDATE TO projects 
+    WHERE (OLD.SPACE_ID != NEW.SPACE_ID OR OLD.SPACE_ID IS NULL) AND NEW.SPACE_ID IS NOT NULL
+    DO ALSO (
+       UPDATE PROJECT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP
+         WHERE MAIN_PROJ_ID = OLD.ID AND SPACE_ID = OLD.SPACE_ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       INSERT INTO PROJECT_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_PROJ_ID,
+         RELATION_TYPE, 
+         SPACE_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('PROJECT_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.SPACE_ID, 
+         (SELECT CODE FROM SPACES WHERE ID = NEW.SPACE_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+    );
+    
+CREATE OR REPLACE RULE project_space_remove_update AS
+    ON UPDATE TO projects 
+    WHERE OLD.SPACE_ID IS NOT NULL AND NEW.SPACE_ID IS NULL
+    DO ALSO (
+       UPDATE PROJECT_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP
+         WHERE MAIN_PROJ_ID = OLD.ID AND SPACE_ID = OLD.SPACE_ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+    );
+    
+CREATE OR REPLACE RULE project_space_insert AS
+    ON INSERT TO projects 
+    WHERE NEW.SPACE_ID IS NOT NULL
+       DO ALSO (
+       INSERT INTO PROJECT_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_PROJ_ID,
+         RELATION_TYPE, 
+         SPACE_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('PROJECT_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.SPACE_ID, 
+         (SELECT CODE FROM SPACES WHERE ID = NEW.SPACE_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+   );
+
+-- sample -> space
+
+CREATE OR REPLACE RULE sample_space_update AS
+    ON UPDATE TO samples_all 
+    WHERE (OLD.SPACE_ID != NEW.SPACE_ID OR OLD.SPACE_ID IS NULL OR OLD.EXPE_ID IS NOT NULL) AND NEW.SPACE_ID IS NOT NULL AND NEW.EXPE_ID IS NULL
+    DO ALSO (
+       UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE MAIN_SAMP_ID = OLD.ID AND SPACE_ID = OLD.SPACE_ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+       INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_SAMP_ID,
+         RELATION_TYPE, 
+         SPACE_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.SPACE_ID, 
+         (SELECT CODE FROM SPACES WHERE ID = NEW.SPACE_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+    );
+    
+CREATE OR REPLACE RULE sample_space_remove_update AS
+    ON UPDATE TO samples_all 
+    WHERE OLD.SPACE_ID IS NOT NULL AND (NEW.SPACE_ID IS NULL OR (OLD.EXPE_ID IS NULL AND NEW.EXPE_ID IS NOT NULL))
+    DO ALSO (
+       UPDATE SAMPLE_RELATIONSHIPS_HISTORY SET VALID_UNTIL_TIMESTAMP = NEW.MODIFICATION_TIMESTAMP 
+         WHERE MAIN_SAMP_ID = OLD.ID AND SPACE_ID = OLD.SPACE_ID AND VALID_UNTIL_TIMESTAMP IS NULL;
+    );
+    
+CREATE OR REPLACE RULE sample_space_insert AS
+    ON INSERT TO samples_all 
+    WHERE NEW.EXPE_ID IS NULL AND NEW.SPACE_ID IS NOT NULL
+    DO ALSO (
+      INSERT INTO SAMPLE_RELATIONSHIPS_HISTORY (
+         ID, 
+         MAIN_SAMP_ID,
+         RELATION_TYPE, 
+         SPACE_ID, 
+         ENTITY_PERM_ID,
+         PERS_ID_AUTHOR,
+         VALID_FROM_TIMESTAMP
+       ) VALUES (
+         nextval('SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ'), 
+         NEW.ID, 
+         'OWNED', 
+         NEW.SPACE_ID, 
+         (SELECT CODE FROM SPACES WHERE ID = NEW.SPACE_ID),
+         NEW.PERS_ID_MODIFIER,
+         NEW.MODIFICATION_TIMESTAMP
+       );
+   );
+-- end of rules for relationships history
\ No newline at end of file
diff --git a/openbis/source/sql/postgresql/156/grants-156.sql b/openbis/source/sql/postgresql/156/grants-156.sql
new file mode 100644
index 0000000000000000000000000000000000000000..891bc70995655a7fd5d040d9ec2899d6b049ef43
--- /dev/null
+++ b/openbis/source/sql/postgresql/156/grants-156.sql
@@ -0,0 +1,129 @@
+-- Granting SELECT privilege to group OPENBIS_READONLY
+
+GRANT SELECT ON SEQUENCE attachment_content_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE attachment_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE code_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE experiment_code_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE sample_code_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE controlled_vocabulary_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE core_plugin_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE cvte_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE data_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE data_set_property_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE data_set_relationship_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE data_set_type_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE data_store_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE DATA_STORE_SERVICES_ID_SEQ TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE data_type_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE database_instance_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE dstpt_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE etpt_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE event_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE experiment_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE experiment_property_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE experiment_type_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE file_format_type_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE space_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE deletion_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE locator_type_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE material_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE material_property_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE material_type_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE mtpt_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE perm_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE person_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE project_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE property_type_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE role_assignment_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE sample_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE sample_property_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE sample_type_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE stpt_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE authorization_group_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE filter_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE query_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE POST_REGISTRATION_DATASET_QUEUE_ID_SEQ TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE ENTITY_OPERATIONS_LOG_ID_SEQ TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE EXPERIMENT_RELATIONSHIPS_HISTORY_ID_SEQ TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE SAMPLE_RELATIONSHIPS_HISTORY_ID_SEQ TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE DATA_SET_RELATIONSHIPS_HISTORY_ID_SEQ TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE PROJECT_RELATIONSHIPS_HISTORY_ID_SEQ TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE EXTERNAL_DATA_MANAGEMENT_SYSTEM_ID_SEQ TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE METAPROJECT_ID_SEQ TO GROUP OPENBIS_READONLY; 
+GRANT SELECT ON SEQUENCE METAPROJECT_ASSIGNMENT_ID_SEQ TO GROUP OPENBIS_READONLY; 
+GRANT SELECT ON SEQUENCE grid_custom_columns_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE sample_relationship_id_seq  TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE script_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON SEQUENCE relationship_type_id_seq TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE attachment_contents TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE attachments TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE controlled_vocabularies TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE controlled_vocabulary_terms TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE core_plugins TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE data_all TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON data TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON data_deleted TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE data_set_properties TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE data_set_properties_history TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON data_set_relationships TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE data_set_relationships_all TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE data_set_type_property_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE data_set_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE data_stores TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE data_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE DATA_STORE_SERVICES TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE DATA_STORE_SERVICE_DATA_SET_TYPES TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE database_version_logs TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE events TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE experiment_properties TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE experiment_properties_history TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE experiment_type_property_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE experiment_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE experiments_all TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON experiments TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON experiments_deleted TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE external_data TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE file_format_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE spaces TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE deletions TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE locator_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE material_properties TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE material_properties_history TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE material_type_property_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE material_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE materials TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE persons TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE projects TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE property_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE role_assignments TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE sample_properties TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE sample_properties_history TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE sample_type_property_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE sample_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE samples_all TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON samples TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON samples_deleted TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON sample_relationships TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE sample_relationships_all TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE authorization_groups TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE authorization_group_persons TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE filters TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE queries TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE scripts TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE POST_REGISTRATION_DATASET_QUEUE TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE ENTITY_OPERATIONS_LOG TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE EXPERIMENT_RELATIONSHIPS_HISTORY TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE SAMPLE_RELATIONSHIPS_HISTORY TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE DATA_SET_RELATIONSHIPS_HISTORY TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE PROJECT_RELATIONSHIPS_HISTORY TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON sample_history_view TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON data_set_history_view TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON experiment_history_view TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE EXTERNAL_DATA_MANAGEMENT_SYSTEMS TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE LINK_DATA TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE grid_custom_columns TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE relationship_types TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE METAPROJECTS TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE METAPROJECT_ASSIGNMENTS_ALL TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON METAPROJECT_ASSIGNMENTS TO GROUP OPENBIS_READONLY;
+GRANT SELECT ON TABLE OPERATION_EXECUTIONS TO GROUP OPENBIS_READONLY;