The required subgroupId attribute references the id of the subgroup with which this integer value is associated.
Source
<xs:complexType name="SubgroupIntegerType"><xs:annotation><xs:documentation>A SubgroupIntegerType defines an xs:positiveInteger type associated with a particular subgroup id.</xs:documentation></xs:annotation><xs:simpleContent><xs:extension base="xs:nonNegativeInteger"><xs:attribute name="subgroupId" type="QIFIdType" use="required"><xs:annotation><xs:documentation>The required subgroupId attribute references the id of the subgroup with which this integer value is associated.</xs:documentation></xs:annotation></xs:attribute></xs:extension></xs:simpleContent></xs:complexType>
<xs:attribute name="subgroupId" type="QIFIdType" use="required"><xs:annotation><xs:documentation>The required subgroupId attribute references the id of the subgroup with which this integer value is associated.</xs:documentation></xs:annotation></xs:attribute>