HP 3000 Manuals HP 3000 Manuals
HP ALLBASE/4GL System Architecture HP ALLBASE/4GL consists of the following major functional components: * Administrator application. * Developer application. * End user applications. * Operating system interface. * Data manager. The Administrator Application The HP ALLBASE/4GL administrator is, in fact, an HP ALLBASE/4GL application. As system administrator, you will use the administrator application to control the overall operation of the HP ALLBASE/4GL system. The administrator application allows you to control system security and set various system-wide defaults. The administrator application also has facilities for loading and unloading applications. The name of the administrator application is administ. The Developer Application The HP ALLBASE/4GL developer is also an HP ALLBASE/4GL application. This is the application that developers use to create end user applications. Its name is developr. The developer provides application development facilities that can be grouped under the following headings: * Dictionary. * User interface screens. * Logic. * Application reports. The developer application includes a number of utilities for copying or deleting application components, for printing documentation, and for testing developed applications. The developer also contains a module builder, which creates file maintenance logic and screens automatically. The HP ALLBASE/4GL Developer Reference Manual describes the developer application in detail. End User Applications HP ALLBASE/4GL supports two types of end user applications: base applications and versions. A base application is an application that is complete in itself and contains all the necessary logic. A version is an application that has been modified for a particular end user or a group of end users. A version cannot exist unless its base application exists on the same HP ALLBASE/4GL system. The Operating System Interface HP ALLBASE/4GL operates on Hewlett-Packard HP 3000 Series 900 computers under the MPE/iX operating system. The MPE/iX operating system interface handles all communication between HP ALLBASE/4GL and the host operating system. For the most part, you won't need to use MPE/iX commands while you're working with the HP ALLBASE/4GL administrator. However, some aspects of managing the HP ALLBASE/4GL system will be a good deal easier to understand if you are familiar with at least the rudiments of the MPE/iX operating system. Data Manager The data manager handles all access to the application databases. HP ALLBASE/4GL gives you flexibility in choosing a data manager suitable for your needs. Applications can use HP ALLBASE/SQL and HP TurboIMAGE/XL databases, and can also use KSAM data files and serial data files.