<xs:element name="BaseLine" type="SequencedBaseFeatureType" minOccurs="2" maxOccurs="2"><xs:annotation><xs:documentation>Each BaseLine element identifies one of a pair of base lines used to construct a midline.</xs:documentation></xs:annotation></xs:element>
<xs:complexType name="LineMidlineType"><xs:annotation><xs:documentation>The LineMidlineType defines the construction of a line that is the midline of two base lines.</xs:documentation></xs:annotation><xs:complexContent><xs:extension base="ConstructionMethodBaseType"><xs:sequence><xs:element name="BaseLine" type="SequencedBaseFeatureType" minOccurs="2" maxOccurs="2"><xs:annotation><xs:documentation>Each BaseLine element identifies one of a pair of base lines used to construct a midline.</xs:documentation></xs:annotation></xs:element></xs:sequence></xs:extension></xs:complexContent></xs:complexType>