Index: DamEngine/trunk/xsd/DamLocation.xsd
===================================================================
diff -u -r1165 -r1171
--- DamEngine/trunk/xsd/DamLocation.xsd	(.../DamLocation.xsd)	(revision 1165)
+++ DamEngine/trunk/xsd/DamLocation.xsd	(.../DamLocation.xsd)	(revision 1171)
@@ -3,7 +3,7 @@
 <xs:schema elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
   <xs:complexType name="Location">
     <xs:sequence>
-      <xs:element name="AssesmentRegionalOptions">
+      <xs:element minOccurs="0" maxOccurs="1" name="AssesmentRegionalOptions">
         <xs:complexType>
           <xs:attribute default="Clay" name="DikeMaterialType" use="optional">
             <xs:simpleType>
@@ -25,8 +25,8 @@
         </xs:complexType>
       </xs:element>
       <xs:element name="AssesmentOptions" />
-      <xs:element name="OperationalOptions" />
-      <xs:element name="DesignOptions">
+      <xs:element minOccurs="0" maxOccurs="1" name="OperationalOptions" />
+      <xs:element minOccurs="0" maxOccurs="1" name="DesignOptions">
         <xs:complexType>
           <xs:attribute name="RedesignDikeHeight" type="xs:boolean" use="required" />
           <xs:attribute name="RedesignDikeShoulder" type="xs:boolean" use="required" />
@@ -117,33 +117,6 @@
           <xs:attribute name="HeadPL4" type="xs:double" use="optional" />
         </xs:complexType>
       </xs:element>
-      <xs:element name="PipingProbabilisticParameters">
-        <xs:complexType>
-          <xs:attribute default="Deterministic" name="LayerHeightDistribution">
-            <xs:simpleType>
-              <xs:restriction base="xs:string">
-                <xs:enumeration value="Deterministic" />
-                <xs:enumeration value="Uniform" />
-                <xs:enumeration value="Triangular" />
-                <xs:enumeration value="Normal" />
-                <xs:enumeration value="LogNormal" />
-                <xs:enumeration value="Exponential" />
-                <xs:enumeration value="Gamma" />
-                <xs:enumeration value="Beta" />
-                <xs:enumeration value="Frechet" />
-                <xs:enumeration value="Weibull" />
-                <xs:enumeration value="Gumbel" />
-                <xs:enumeration value="Rayleigh" />
-                <xs:enumeration value="Pareto" />
-                <xs:enumeration value="TruncatedNormal" />
-                <xs:enumeration value="Table" />
-                <xs:enumeration value="StudentT" />
-              </xs:restriction>
-            </xs:simpleType>
-          </xs:attribute>
-          <xs:attribute name="LayerHeightDeviation" type="xs:double" />
-        </xs:complexType>
-      </xs:element>
       <xs:element name="DesignScenarios">
         <xs:complexType>
           <xs:sequence>
@@ -190,7 +163,7 @@
           <xs:attribute name="MinimumCircleDepth" type="xs:double" use="optional" />
         </xs:complexType>
       </xs:element>
-      <xs:element name="ModelFactors" nillable="true">
+      <xs:element minOccurs="0" maxOccurs="1" name="ModelFactors">
         <xs:complexType>
           <xs:attribute name="RequiredSafetyFactorStabilityInnerSlope" type="xs:double" use="optional" />
           <xs:attribute name="RequiredSafetyFactorStabilityOuterSlope" type="xs:double" use="optional" />