insurance.aero
journal.aero
journalist.aero
leasing.aero
logistics.aero
magazine.aero
maintenance.aero
media.aero
microlight.aero
modelling.aero
navigation.aero
parachuting.aero
paragliding.aero
passenger-association.aero
pilot.aero
press.aero
production.aero
recreation.aero
repbody.aero
res.aero
research.aero
rotorcraft.aero
safety.aero
scientist.aero
services.aero
show.aero

          <type>String</type>
        </field>
        <field>
          <name>properties</name>
          <version>3.0.0+</version>
          <description>Properties about the contributor, such as an instant messenger handle.</description>
          <type>Properties</type>
          <association xml.mapStyle="inline">
            <type>String</type>
            <multiplicity>*</multiplicity>
          </association>