[Tagging] inconsistencies in bridge

[M∡rtin Koppenhoefer]

recently there was introduced some weird stuff in bridge:
http://wiki.openstreetmap.org/wiki/Key:bridge

    bridge=yes
    bridge=aqueduct
    bridge=viaduct
    bridge=swing
    bridge=abandoned
    bridge=...

I'm fine with yes, but also aqueduct, viaduct, swing may be OK,
indicating all a special kind of structure, some of them maybe not
necessarily bridges (e.g. aqueduct: how do you tag the parts that are
solid walls and don't allow to pass under?), but they follow some
logics.

But abandoned? How would that fit into bridge typology? Looking at the
page history the author put "former" before this, and then changed to
abandoned. Both are status-tags. How would I proceed to tag a
abandoned aqueduct? I don't think it's a good idea to mix status an
typology.

cheers,
Martin