User:Karaken12/multivalue
From Wikipedia, the free encyclopedia
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The multivalue database paradigm is an outgrowth of the ideas behind relational databases, hence the term 'post-relational' to detail the same concepts.
The basic premise of multivalued databases is that rather than each record (or item, see terminology below) ...
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[edit] Database Structure
Arguably the most basic unit of a multivalue database is the file; every piece of data in a multivalue database is contained in some sort of file. The most important file is variously termed the master dictionary (MD), vocabularly file (VOC) or ..., but in each case the
[edit] Terminology
Historically, multivalue databases have used a different terminology from standard relational databases, even though many of the concepts are directly equivalent. A 'file' in a multivalue database coresponds to a table, an 'item' to a records, and an 'attribute' to a field. 'Values' and 'subvalues' have no equivalent in relational databases, as do 'accounts'.
In this article, mutlivalue terms will be used.
[edit] Databases
There are several mutlivalue database systems available, some of which are listed below.
[edit] External links
- [1] A multivalued database
