diff --git a/OJP.xsd b/OJP.xsd
index 483c9bf8..7243c9c7 100644
--- a/OJP.xsd
+++ b/OJP.xsd
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<xs:schema xmlns="http://www.vdv.de/ojp" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:siri="http://www.siri.org.uk/siri" xmlns:ifopt="http://www.ifopt.org.uk/ifopt" targetNamespace="http://www.vdv.de/ojp" elementFormDefault="qualified" version="1.0" id="OJP_siri">
+<xs:schema xmlns="http://www.vdv.de/ojp" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:siri="http://www.siri.org.uk/siri" targetNamespace="http://www.vdv.de/ojp" elementFormDefault="qualified" version="1.0" id="OJP_siri">
 	<xs:annotation>
 		<xs:documentation>OJP.xsd - OJP messages as extension of SIRI</xs:documentation>
 	</xs:annotation>
diff --git a/OJP/OJP_Availability.xsd b/OJP/OJP_Availability.xsd
index 2efec465..388206f2 100644
--- a/OJP/OJP_Availability.xsd
+++ b/OJP/OJP_Availability.xsd
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<xs:schema xmlns="http://www.vdv.de/ojp" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:siri="http://www.siri.org.uk/siri" targetNamespace="http://www.vdv.de/ojp" elementFormDefault="qualified">
+<xs:schema xmlns="http://www.vdv.de/ojp" xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.vdv.de/ojp" elementFormDefault="qualified">
 	<xs:annotation>
 		<xs:documentation>OJP/OJP_Availability.xsd - Request and response definitions for availability of tickets and services on a journey leg.</xs:documentation>
 	</xs:annotation>
diff --git a/OJP/OJP_Lines.xsd b/OJP/OJP_Lines.xsd
index 79958dda..8c513e23 100644
--- a/OJP/OJP_Lines.xsd
+++ b/OJP/OJP_Lines.xsd
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<xs:schema xmlns="http://www.vdv.de/ojp" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:siri="http://www.siri.org.uk/siri" xmlns:gml="http://www.opengis.net/gml/3.2" targetNamespace="http://www.vdv.de/ojp" elementFormDefault="qualified" id="OJP_siri_service">
+<xs:schema xmlns="http://www.vdv.de/ojp" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:siri="http://www.siri.org.uk/siri" targetNamespace="http://www.vdv.de/ojp" elementFormDefault="qualified" id="OJP_siri_service">
 	<xs:annotation>
 		<xs:documentation>OJP/OJP_Lines.xsd - Request and response definitions for information on lines</xs:documentation>
 	</xs:annotation>
diff --git a/OJP/OJP_ModesSupport.xsd b/OJP/OJP_ModesSupport.xsd
index e2fdcba0..68dc0848 100644
--- a/OJP/OJP_ModesSupport.xsd
+++ b/OJP/OJP_ModesSupport.xsd
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<xs:schema xmlns="http://www.vdv.de/ojp" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:siri="http://www.siri.org.uk/siri" xmlns:ifopt="http://www.ifopt.org.uk/ifopt" targetNamespace="http://www.vdv.de/ojp" elementFormDefault="qualified">
+<xs:schema xmlns="http://www.vdv.de/ojp" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:siri="http://www.siri.org.uk/siri" targetNamespace="http://www.vdv.de/ojp" elementFormDefault="qualified">
 	<xs:annotation>
 		<xs:documentation>OJP/OJP_ModesSupport.xsd - Supporting definitions for the classification of modes of transport</xs:documentation>
 	</xs:annotation>
diff --git a/OJP/OJP_Trips.xsd b/OJP/OJP_Trips.xsd
index 5e202130..5a8a7a74 100644
--- a/OJP/OJP_Trips.xsd
+++ b/OJP/OJP_Trips.xsd
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<xs:schema xmlns="http://www.vdv.de/ojp" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:siri="http://www.siri.org.uk/siri" xmlns:ifopt="http://www.ifopt.org.uk/ifopt" targetNamespace="http://www.vdv.de/ojp" elementFormDefault="qualified">
+<xs:schema xmlns="http://www.vdv.de/ojp" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:siri="http://www.siri.org.uk/siri" targetNamespace="http://www.vdv.de/ojp" elementFormDefault="qualified">
 	<xs:annotation>
 		<xs:documentation>OJP/OJP_Trips.xsd - Request and response definitions for trip requests and distributed journey planning</xs:documentation>
 	</xs:annotation>