Mapping of data source schema data types relating a server side database
description into a set of OLE DB data types is rendered subject to user modification
by provision of a dual Schema File at a client side terminal which contains an
original unmodifiable copy and a modifiable working copy of the data source schema.
When the server side database description is altered, user modifications to the
modifiable copy are preserved as much as possible by performing a matching process
on the client side in the course of generating new unmodifiable and modifiable
schema files which comprise a new dual Schema File.