One reasonable hypothesis for this data model lasting 50 years, with new database implementations of the model even in the 21st century is that it provides inexpensive database solutions. With a data model that aligns well with JSON and XML and that permits access with or without the use of SQL. Marketing groups and others in the industry over the years have classified MultiValue databases as pre-relational, post-relational, relational, and embedded, with detractors often classifying it as legacy. An attempt to document the similarities and differences can be found at the Post-Relational Database Reference (PRDB). Because of the differences, some implementations have provisions for supporting several flavors of the languages. These streams of MultiValue database development could be classified as one stemming from PICK R83, one from Microdata Reality, and one from Prime Information. Subsequently, these flavors diverged, although with some cross-over. In spite of attempts to standardize, particularly by International Spectrum and the Spectrum Manufacturers Association, who designed a logo for all to use, there are no standards across MultiValue implementations. Three of the implementations of MultiValue - PICK version R77, Microdata Reality 3.x, and Prime Information 1.0 - were very similar. Simms played a lot of Star Trek while developing the language, in order to have the language function to his satisfaction. It was based on Dartmouth BASIC, but had enhanced features for data management. Ken Simms wrote DataBASIC, sometimes known as S-BASIC, in the mid-70's. This was but the first dispute regarding MultiValue databases that was addressed by the courts.
#Download kiwix database software
Pick considered the software to be in the public domain because it was written for the military. Dick Pick, a developer at TRW, worked on the first implementation of this model for the US Army in 1965. Unlike SQL-DBMS tools, most MultiValue databases can be accessed both with or without SQL.ĭon Nelson designed the MultiValue data model in the early to mid-1960s. They are often categorized with MUMPS within the category of post-relational databases, although the data model actually pre-dates the relational model. These databases differ from a relational database in that they have features that support and encourage the use of attributes which can take a list of values, rather than all attributes being single-valued. MultiValue databases include commercial products from Rocket Software, Zumasys, Revelation, Ladybridge, InterSystems, Northgate Information Solutions, ONgroup, and other companies. JSTOR ( April 2018) ( Learn how and when to remove this template message)Ī MultiValue database is a type of NoSQL and multidimensional database, typically considered synonymous with PICK, a database originally developed as the Pick operating system.Unsourced material may be challenged and removed.įind sources: "MultiValue database" – news Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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