Sybase Open Client provides two core programming interfaces for writing client applications: DB-Library™ and Client-Library.
Open Client DB-Library provides support for older Open Client applications, and is a completely separate programming interface from Client-Library. DB-Library is documented in the Open Client DB-Library/C Reference Manual, provided with the Sybase Open Client product.
Client-Library programs also depend on CS-Library, which provides routines that are used in both Client-Library and Server-Library applications. Client-Library applications can also use routines from Bulk-Library to help high-speed data transfer.
Both CS-Library and Bulk-Library are included in the Sybase Open Client, which is available separately.