The edm:Apply expression allows to specify functions that are applied on the client side.
It would be very helpful to define a standard set of common functions that all client libraries should implement.
Otherwise we end up with a tight coupling of clients and servers because the latter define com.microsoft.Concat and com.sap.Concat.
should these be odata.concat and odata.get?
proposal should spell out casting/serialization rules before being handed over to editors.