The optional color attribute is the color for the polyline.
Source
<xs:element name="Loop" type="Polyline2dType" minOccurs="1" maxOccurs="unbounded"><xs:annotation><xs:documentation>Each Loop element is a 2D loop defined as a polyline.</xs:documentation></xs:annotation></xs:element>
The required n attribute is the number of loops in this set.
Source
<xs:complexType name="Loops2dType"><xs:annotation><xs:documentation>The Loops2dType defines a set of loops. The first loop is outer, the rest are inner loops.</xs:documentation></xs:annotation><xs:sequence><xs:element name="Loop" type="Polyline2dType" minOccurs="1" maxOccurs="unbounded"><xs:annotation><xs:documentation>Each Loop element is a 2D loop defined as a polyline.</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 loops 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 loops in this set.</xs:documentation></xs:annotation></xs:attribute>