An access service is the client connection point for a DirectConnect server. You can think of it as the pairing of an access service library with a set of specific values for the configuration properties. You must define at least one access service for every Access Service Library.
Access services allow clients to access data from a specific target. Each access service is a specific set of configuration properties that:
Transforms SQL
Converts datatypes
Transfers data between the target database and other servers accessible through Open Client™
Supports Catalog Stored Procedures (CSPs) and system stored procedures
Supports remote stored procedures (RSPs) and host-resident requests
