Index: DamEngine/trunk/xsd/DamSensor.xsd
===================================================================
diff -u -r1611 -r1620
--- DamEngine/trunk/xsd/DamSensor.xsd	(.../DamSensor.xsd)	(revision 1611)
+++ DamEngine/trunk/xsd/DamSensor.xsd	(.../DamSensor.xsd)	(revision 1620)
@@ -7,7 +7,7 @@
         <xs:complexType>
           <xs:attribute name="PLineType" use="required">
             <xs:simpleType>
-              <xs:restriction base="xs:int">
+              <xs:restriction base="xs:unsignedInt">
                 <xs:enumeration value="Pl1" />
                 <xs:enumeration value="Pl2" />
                 <xs:enumeration value="Pl3" />
@@ -28,7 +28,7 @@
     <xs:attribute name="RelativeLocation" type="xs:double" use="required" />
     <xs:attribute name="SensorType" use="required">
       <xs:simpleType>
-        <xs:restriction base="xs:int">
+        <xs:restriction base="xs:unsignedInt">
           <xs:enumeration value="PiezometricHead" />
           <xs:enumeration value="WaterLevel" />
           <xs:enumeration value="PolderLevel" />