Fix for <post>

Made depth, length, diameter, inclination and shape optional

Author: stephane-pv

schema/pvcollada_schema_0.1.xsd

@@ -968,27 +968,27 @@ xmlns:collada="http://www.collada.org/2008/03/COLLADASchema">
             <xs:documentation>The type of post (rack, tracker, fence).</xs:documentation>
           </xs:annotation>
         </xs:element>
-        <xs:element name="depth" type="collada:float_type">
+        <xs:element name="depth" type="collada:float_type" minOccurs="0">
           <xs:annotation>
             <xs:documentation>The nominal underground depth of the post.</xs:documentation>
           </xs:annotation>
         </xs:element>
-        <xs:element name="length" type="collada:float_type">
+        <xs:element name="length" type="collada:float_type" minOccurs="0">
           <xs:annotation>
             <xs:documentation>The total length of the post including the portion underground.</xs:documentation>
           </xs:annotation>
         </xs:element>
-        <xs:element name="diameter" type="collada:float_type">
+        <xs:element name="diameter" type="collada:float_type" minOccurs="0">
           <xs:annotation>
             <xs:documentation>The diameter of the post cross-section.</xs:documentation>
           </xs:annotation>
         </xs:element>
-        <xs:element name="inclination" type="post_inclin_enum">
+        <xs:element name="inclination" type="post_inclin_enum" minOccurs="0">
           <xs:annotation>
             <xs:documentation>The nominal inclination of the post (vertical, perpendicular).</xs:documentation>
           </xs:annotation>
         </xs:element>
-        <xs:element name="shape" type="post_shape_enum">
+        <xs:element name="shape" type="post_shape_enum" minOccurs="0">
           <xs:annotation>
             <xs:documentation>The shape of the post cross-section (rectangle, circle, h-shape).</xs:documentation>
           </xs:annotation>