The id attribute is the QIF id of the external document reference, used for internal referencing.
Source
<xs:element name="ExternalQIFDocument" type="ExternalQIFDocumentReferenceType" maxOccurs="unbounded"><xs:annotation><xs:documentation>Each ExternalQIFDocument element contains information about an external QIF document referenced by this QIF document.</xs:documentation></xs:annotation></xs:element>
The ExternalQIFReferencesType contains information about QIF documents referenced by this QIF document using the external id referencing mechanism in the QIFReferenceType.
The required n attribute is the number of external QIF documents in the list.
Source
<xs:complexType name="ExternalQIFReferencesType"><xs:annotation><xs:documentation>The ExternalQIFReferencesType contains information about QIF documents referenced by this QIF document using the external id referencing mechanism in the QIFReferenceType.</xs:documentation></xs:annotation><xs:sequence><xs:element name="ExternalQIFDocument" type="ExternalQIFDocumentReferenceType" maxOccurs="unbounded"><xs:annotation><xs:documentation>Each ExternalQIFDocument element contains information about an external QIF document referenced by this QIF document.</xs:documentation></xs:annotation></xs:element></xs:sequence><xs:attribute name="n" type="NaturalType" use="required"><xs:annotation><xs:documentation>The required n attribute is the number of external QIF documents in the list.</xs:documentation></xs:annotation></xs:attribute></xs:complexType>
<xs:attribute name="n" type="NaturalType" use="required"><xs:annotation><xs:documentation>The required n attribute is the number of external QIF documents in the list.</xs:documentation></xs:annotation></xs:attribute>