how to model a transfer

hi!

branched out from the other thread, i am running into a limitation of
http://payswarm.com/vocabs/commerce#transfer in that it assumes that
it's monetary funds that are being transferred.

How do you expressed that assets were shipped and/or received?

Both the shipment of the asset and the "shipment" of the monetary
funds involved in a sale have to be prescribed by a contract, and
unless stated otherwise, if it's in the passed then we assume both
also actually took place. So i think funds transfer and asset transfer
have a lot in common with each other, yet commerce#transfer seems to
be restricted to the transfer of funds?