The optional label attribute is the model entity "nameplate". Normally it can be seen at the entity item in the project tree.
Source
<xs:element name="HatchStyle" type="HatchStyleType" maxOccurs="unbounded"><xs:annotation><xs:documentation>Each HatchStyle element defines a hatching style.</xs:documentation></xs:annotation></xs:element>
The required n attribute is the number of hatching styles in this set.
Source
<xs:complexType name="HatchStyleSetType"><xs:annotation><xs:documentation>The HatchStyleSetType defines a collection of hatching styles.</xs:documentation></xs:annotation><xs:sequence><xs:element name="HatchStyle" type="HatchStyleType" maxOccurs="unbounded"><xs:annotation><xs:documentation>Each HatchStyle element defines a hatching style.</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 hatching styles in this set.</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 hatching styles in this set.</xs:documentation></xs:annotation></xs:attribute>