element  MainGroup  
diagram
version V3_2
namespace http://www.wipo.int/standards/XMLSchema/ST96/Patent
type xsd: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>