attribute  ipoVersion 
versionV3_1
namespacehttp://www.wipo.int/standards/XMLSchema/ST96/Common
typexsd:token
source<xsd:attribute  name="ipoVersion"  type="xsd:token">
<xsd:annotation>
<xsd:documentation>
A specific version of an IPO’s implemented XML schema
</xsd:documentation>
</xsd:annotation>
</xsd:attribute>