The optional xId attribute is a reference to the id of a QIF object in an external document. A QIF object in an external QIF document can be referenced by using references to two QIF ids: the id of the external document reference of type ExternalQIFDocumentReferenceType found in the local document and the id of the object found in the external document.
Source
<xs:element name="FirstFeatureLocation" type="QIFReferenceType"><xs:annotation><xs:documentation>The FirstFeatureLocation element identifies the nominal feature whose location is the location of the first element of the pattern.</xs:documentation></xs:annotation></xs:element>
Complex Type PatternFeatureParallelogramNominalType
Annotations
The PatternFeatureParallelogramNominalType defines the pattern feature nominal information for an individual parallelogram pattern feature. The nominal location of the parallelogram pattern is the nominal location of the first feature in the pattern (which is not necessarily the first feature in the feature set).
The id attribute is the QIF id of the feature, used for referencing.
Source
<xs:complexType name="PatternFeatureParallelogramNominalType"><xs:annotation><xs:documentation>The PatternFeatureParallelogramNominalType defines the pattern feature nominal information for an individual parallelogram pattern feature. The nominal location of the parallelogram pattern is the nominal location of the first feature in the pattern (which is not necessarily the first feature in the feature set).</xs:documentation></xs:annotation><xs:complexContent><xs:extension base="PatternFeatureNominalBaseType"><xs:sequence><xs:element name="FirstFeatureLocation" type="QIFReferenceType"><xs:annotation><xs:documentation>The FirstFeatureLocation element identifies the nominal feature whose location is the location of the first element of the pattern.</xs:documentation></xs:annotation></xs:element></xs:sequence></xs:extension></xs:complexContent></xs:complexType>