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