element  MainGroup 
diagram
versionV3_0
namespacehttp://www.wipo.int/standards/XMLSchema/ST96/Patent
typexsd:string
used by
complexType pat:CPCClassificationType  pat:ECLAClassificationType  pat:IPCRClassificationType
source<xsd:element  name="MainGroup"  type="xsd:string">
<xsd:annotation>
<xsd:documentation>
The fourth hierarchical level in the classification scheme
</xsd:documentation>
</xsd:annotation>
</xsd:element>