element  PrincipalDesignReference 
diagram
versionV3_0
namespacehttp://www.wipo.int/standards/XMLSchema/ST96/Design
typexsd:string
used by
complexType dgn:PrincipalDesignRelationType
source<xsd:element  name="PrincipalDesignReference"  type="xsd:string">
<xsd:annotation>
<xsd:documentation>
Reference to the specific design contained in the document
</xsd:documentation>
</xsd:annotation>
</xsd:element>