For a long time Delphi has included a technology for building multi-tier database applications. Formerly known as MIDAS and later as DataSnap, Delphi's multi-tier technology was based on COM, even if the remote connectivity could be provided by sockets and HTTP, instead of DCOM. For some time, it even supported CORBA. A slightly modified version, provided SOAP connectivity.
Delphi 2009 still includes the classic DataSnap, but provides a brand new remoting and multi-tier technology as well. It is partially based on the dbEx-press architecture. This new technology is still called DataSnap, but to avoid confusion is generally referenced as "DataSnap 2009".
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