2.2.3.3.4 Version Simple Type

The Version type contains information about the version of the XML schema that applies to the parent XML document.

 <xs:simpleType name="Version">
   <xs:restriction base="xs:string">
     <xs:pattern value="[0-9]+\.[0-9]+(\.[0-9]+(\.[0-9]+)?)?"/>
   </xs:restriction>
 </xs:simpleType>