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The Santa Fe railroad used MAPPER to develop a system in a project that was an early example of 4GL, rapid prototyping, and programming by users. [9] The idea was that it was easier to teach railroad experts to use MAPPER than to teach programmers the "intricacies of railroad operations".
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Declarative programming stands in contrast to imperative programming via imperative programming languages, where control flow is specified by serial orders (imperatives). (Pure) functional and logic-based programming languages are also declarative, and constitute the major subcategories of the declarative category. This section lists additional ...
Examples: Prolog, OPS5, Mercury, CVXGen [7] [8], Geometry Expert. A fifth-generation programming language (5GL) is any programming language based on problem-solving using constraints given to the program, rather than using an algorithm written by a programmer. [9] They may use artificial intelligence techniques to solve problems in this way.
PowerHouse is a byte-compiled fourth-generation programming language (or 4GL) originally produced by Quasar Corporation (later renamed Cognos Incorporated) for the Hewlett-Packard HP3000 mini-computer, as well as Data General and DEC VAX/VMS systems. It was initially composed of five components:
OpenEdge Advanced Business Language, or OpenEdge ABL for short, is a business application development language created and maintained by Progress Software Corporation. Typically classified as a fourth-generation programming language , it utilizes an English-like syntax to simplify software development. [ 1 ]
SheerPower 4GL is a fourth-generation programming language developed by Touch Technologies, Inc. [1] SheerPower 4GL is the result of porting Touch Technologies' Intouch 4GL programming language that runs on OpenVMS (for DEC Alpha and VAX computers) to Windows, launching in 2000. Downloads are free from the official SheerPower 4GL website. [2]
Clarion is a commercial, proprietary, fourth-generation programming language (4GL), multi-paradigm, programming language and integrated development environment (IDE) from SoftVelocity used to program database applications.