</xs:documentation>
</xs:annotation>
</xs:attribute>
+ <xs:attribute name="type" type="xs:string"
+ use="optional">
+ <xs:annotation>
+ <xs:documentation>
+ An identifier for the viewer type, currently either
+ JMOL or CHIMERA
+ </xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
</xs:extension>
</xs:simpleContent>