The Base is a part of each SNA Server component, such as the local 2.1 node or a link service, that provides the operating environment for the core functions of that component. It passes messages between components and provides functions common to all components, such as diagnostic tracing.
This document is concerned with the DL-BASE, which is the type of Base used by SNA Server 3270 emulation programs. The SNA Server DL-BASE supports a single SNA Server component or a single user application and has entry points for initialization, sending messages, receiving messages, and termination.