The PointFeatureDefinitionType defines the point feature nominal information that can be common to one or more point features. There is no definition information for a point feature beyond what is provided by the PointFeatureDefinitionBaseType.
The id attribute is the QIF id of the feature, used for referencing.
Source
<xs:complexType name="PointFeatureDefinitionType"><xs:annotation><xs:documentation>The PointFeatureDefinitionType defines the point feature nominal information that can be common to one or more point features. There is no definition information for a point feature beyond what is provided by the PointFeatureDefinitionBaseType.</xs:documentation></xs:annotation><xs:complexContent><xs:extension base="PointFeatureDefinitionBaseType"/></xs:complexContent></xs:complexType>