HP 3000 Manuals HP 3000 Manuals
Base Applications and Versions HP ALLBASE/4GL supports two types of end user applications. These are referred to as base applications and versions. A base application is an application that is complete in itself and contains all the necessary logic to perform the required data processing functions. A version is an additional set of parameters that operate in conjunction with a base application to modify it to suit the needs of a particular user or group of users. A version is not complete in itself and cannot exist without a base application. HP ALLBASE/4GL only stores the parts of the application that have been modified with the version. This allows a developer to create a version of an application without copying the entire application. In addition, HP ALLBASE/4GL automatically implements changes made to items in the base application (with some exceptions) in the version unless a copy of the item exists in the version. You cannot use a version unless the base application exists on the same HP ALLBASE/4GL system. The HP ALLBASE/4GL run-time environment does not contain the facilities required to develop new applications or versions. The run-time environment only allows you to use applications and versions that have been developed in the HP ALLBASE/4GL development environment. The run-time environment allows you to define the authorized users for applications and versions, and also allows you to define passwords for applications and versions. Within an application or version, you can restrict certain menu items to selected end users, or groups of end users. If an application accesses an HP ALLBASE/SQL or HP TurboIMAGE/iX database, you must specify that the application may access the database. Before an HP ALLBASE/SQL database can be accessed by an application, the database name, and an SQL owner group (if necessary), must be specified on the application definition screen. HP TurboIMAGE/iX databases can be defined on the database definition screen, and then associated with an application on the parameters for database access screen. Base Application and Version Names Your HP ALLBASE/4GL support service can give you the names of the applications and versions on your system. HP ALLBASE/4GL is case sensitive with respect to application or version names, so be careful as you enter the names.