<xs:attribute name="sequenceRef" type="xs:string" use="optional"/>\r
<xs:attribute name="graphColour" type="xs:int" use="optional"/>\r
<xs:attribute name="graphGroup" type="xs:int" use="optional"/>\r
+ <xs:attribute name="id" type="xs:string" use="optional"/>\r
</xs:complexType>\r
</xs:element>\r
</xs:sequence>\r