[05:01:53] <retonlage>	 are transitive properties (in particular subclass relations) meant to all be applied or just the "bottommost" one
[05:01:57] <retonlage>	 ?
[05:02:58] <retonlage>	 i ask because some dams (such as aswan) are marked both gravity dam and just dam, and other (such as three gorges) are just marked as gravity dams