Visual DataFlex: Difference between revisions
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#Redirect [[DataFlex]] |
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'''Visual DataFlex''' is a 4GL windows [[programming language]] by [[Data Access (company)|Data Access]], targeted at creating [[database]] and client-server type programs. |
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== Architecture == |
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Visual DataFlex has a 3-layer architecture: |
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;Bottom layer: Tables at this level represent customer information. Data dictionaries for each table define the rules for saving, editing, deleting, or finding a customer. |
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;Middle layer: Tables at this level represent orders to customers. A ''Data Dictionary Connectivity Object Tree'' defines how tables relate to each other, and ensures that all business rules of the connected tables are in force and validate. |
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;Top layer: A graphical interface ([[GUI]]) that allows users to enter, find, create, modify, or delete data. |
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==History== |
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Data Access is the company behind the language and has build its business up around the console mode [[DataFlex]] language. The first attempt at a windows product was DataFlex for Windows which miserably failed as it was a sort of windows bolted on top of DOS product. Then they released Visual DataFlex 4.0 in 1996 which did create the possibility to write real windows applications. |
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Progress has been made. |
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==External links== |
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*[http://www.visualdataflex.com Official website] |
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{{compu-lang-stub}} |
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[[Category:4GL]] |
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[[Category:Domain-specific programming languages]] |
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[[ms:Visual DataFlex]] |
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[[ru:Visual DataFlex]] |
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Latest revision as of 16:13, 19 March 2017
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