eXist

eXist-db (or eXist for short) is an open source software project for NoSQL databases built on XML technology. It is classified as both a NoSQL document-oriented database system and a native XML database (and it provides support for XML, JSON, HTML and Binary documents). Unlike most relational database management systems (RDBMS) and NoSQL databases, eXist-db provides XQuery and XSLT as its query and application programming languages.

eXist-db
Original author(s)Wolfgang Meier
Developer(s)Pierrick Brihayne, Leif-Jöran Olsson, Adam Retter,[1] Dmitriy Shabanov, and Dannes Wessels.
Initial release2000 (2000)
Stable release
5.2.0 / January 23, 2020 (2020-01-23)
Repositorygithub.com/exist-db/exist/
Written inJava
Operating systemLinux, Mac, Windows
PlatformJava
Standard(s)XQuery XSLT XPath XUpdate XQJ DTD XML Schema RelaxNG XML
TypeNoSQL DBMS
LicenseGNU LGPL v2.1.
Websitewww.exist-db.org

eXist-db is released under version 2.1 of the GNU LGPL.

History

eXist-db was created in 2000 by Wolfgang Meier. Major versions released were 1.0 in October 2006, 2.0 in February 2013, 3.0 in February 2017, 4.0 in February 2018, and 5.0.0 in September 2019.

eXist-db was awarded the best XML database of the year by InfoWorld in 2006.[2]

The companies eXist Solutions GmbH in Germany, and Evolved Binary in the UK, promote and provide support for the software.[3][4].

There is an O'Reilly book for eXist-db which is co-authored by Adam Retter and Erik Siegel.[5]

Features

eXist-db allows software developers to persist XML/JSON/Binary documents without writing extensive middleware. eXist-db follows and extends many W3C XML standards such as XQuery. eXist-db also supports REST interfaces for interfacing with AJAX-type web forms. Applications such as XForms may save their data by using just a few lines of code. The WebDAV interface to eXist-db allows users to "drag and drop" XML files directly into the eXist-db database. eXist-db automatically indexes documents using a keyword indexing system.

Supported standards and technologies

eXist-db has support for the following standards and technologies:

  • XPath - XML Path language
  • XQuery - XML Query language
  • XSLT - Extensible Stylesheet Language Transformations
  • XSL-FO - XSL Formatting Objects
  • WebDAV - Web distributed authoring and versioning
  • REST - Representational state transfer (URL encoding)
  • RESTXQ - RESTful annotations for XQuery
  • XInclude - server-side include file processing (limited support)
  • XML-RPC - a remote procedure call protocol
  • XProc - a XML Pipeline processing language
  • XQuery API for Java[6]

See also
  • NoSQL
  • XML database
  • XQuery - W3C XML query language
  • XPath - W3C XML data selection language
  • WebDAV - Web Distributed Authoring and Versioning
  • BaseX - another Open Source Native XML Database
  • CouchDB - a document-oriented database based on JSON

References
  1. "Adam Retter - O'Reilly Media". Retrieved November 30, 2017.
  2. "InfoWorld Best XML Database 2006"
  3. "About eXist Solutions". Retrieved September 23, 2016.
  4. "About Evolved Binary". Retrieved September 2, 2019.
  5. "eXist". Retrieved November 30, 2017.
  6. eXist XQJ API

Further reading
  • Siegel, Erik; Retter, Adam (2014). eXist : A NoSQL Document Database and Application Platform. O'Reilly Media. ISBN 978-1-4493-3710-0.
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