Component definition

IMS considers a workstation to be one physical terminal. If a workstation is made up of more than one device, each physical device that makes up the workstation must be defined as a component of that workstation.

Each component can have an IMS logical terminal (LTERM) associated with it. One LTERM is associated with each component. A user-written MPP can address specific components of a workstation through the appropriate LTERM.

IMS assumes that all input is from the first LTERM in the component list that passes the necessary operational and security checks. Message switches, broadcast messages for specific logical terminals, and data replies to transactions are directed to the component associated with the specified output LTERM.