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The development of the 4GL was influenced by several factors, with the hardware and operating system constraints having a large weight. When the 4GL was first introduced, a disparate mix of hardware and operating systems mandated custom application development support that was specific to the system in order to ensure sales.
It is specifically designed to run as a client on a network, connected to an IBM Informix database engine service. It has a mechanism for calling C Programming Language functions and conversely, to be called from executing C programs. The RDS version also features an interactive debugger for Dumb terminals. A particular feature is the ...
In the early 1990s, a new PC-based tool for developing LINC specifications was released, the LINC Development Assistant (LDA). LDA was written in a mixture of Smalltalk and C++ rather than the LINC 4GL (the latter of which was not intended to run on a personal computer). From version 17, it was intended that all development be done with LDA.
ELF—Executable and Linkable Format; ELM—ELectronic Mail; EMACS—Editor MACroS; EMS—Expanded Memory Specification; ENIAC—Electronic Numerical Integrator And Computer; EOF—End of File; EOL—End of Life; EOL—End of Line; EOM—End of Message; EOS—End of Support; EPIC—Explicitly Parallel Instruction Computing; EPROM—Erasable ...
The main feature of the LANSA environment is the 'RDML / RDMLX' language–which is classified as a 4GL (4th generation language). [1] RDML closely follows the syntax of IBM CL or Control Language. CL is the "scripting language" equivalent of the OS/400 operating system. In recent years RDML has been extended to become RDMLX. This new version ...
The key to CorVision is PROCEDURES. The procedures in CorVision eventually become Executable Images (.EDO's). Three types of procedures are: Screen Procedures Used for data entry and updating, can be accessed from a menu and is navigatable. A Procedure of this type consists of the Menu selection and any key screens and data screen.
Basic4GL (B4GL; from Basic for openGL) is an interpreted, open source version of the BASIC programming language which features support for 3D computer graphics using OpenGL. While being interpreted, it is also able to compile programs on top of the virtual machine to produce standalone executable programs.
OpenROAD, which stands for "Open Rapid Object Application Development", is a fourth-generation programming language (4GL) and development suite from Actian Corporation. It includes a suite of development tools, with built-in Integrated development environment (IDE) (Written in OpenROAD), and Code Repository.