Composition This DM snipet shows a basic composition example: Wings are part of the plane 1.0 2016-01-12T10:55:49 ivoa http://volute.g-vo.org/svn/trunk/projects/dm/vo-dml/models/ivoa/IVOA.vo-dml.xml http://volute.g-vo.org/svn/trunk/projects/dm/vo-dml/models/ivoa/IVOA.html base base base.Wing Wing base.Wing.SerialNumber SerialNumber ivoa:string 1 1 base.Airplane Airplane base.Airplane.SerialNumber SerialNumber ivoa:string 1 1 base.Airplane.Wings Wings Composition:base.Wing 2 2