Thanks to all of you who replied.

A several of you asked for more details, I dare to send one public reply
  instead
of serveral individual ones (Sorry for the waste of bandwidth).


What is the interface?
  Is it a client/server interface
  Is it a database synchronization
  Is it extract and load

What we are expected to do is to pass information stored in a IMAGE db over
   to a
dBase application. The PC appl. serves as marketing instrument and holds
  basically
company information and marketing activity information, but no information
regarding our policy holders. The Image application
holds information which concern our policy holders (we are a credit
insurance company).

Now we want to update the PC application with information like (who is
  already
a policy holder, which policy number does he have).

The steps to do this are:
1) Identify a common attribut to be able to match PC information and
   IMAGE information (like a common company number)
2) Do a first time update to load the current information
3) Load changes which are done on the IMAGE side (e.g a new company becomes
   a policy holder) into the dBase application on a regular basis


What is the frequency for which the interface would execute
  Is it one-time event, daily, on-demand
  Is it real-time


As mentioned above. Frequency is a first time load and a periodic update.
  The
frequency for the periodic updates have not been specified yet. But should
  be
a least on a daily basis. A real time link would be nice, but will be
  certainly
to most combersome to implement (not to speak of cost).


Thank you
 Friedrich