Emdros - the database engine for analyzed or annotated text

Home - What is Emdros?

  • Emdros is a:

    text database engine for analyzed or annotated text.

  • Emdros is well suited to distributing static databases of textual and image content on mobile and desktop platforms.

  • Emdros has a powerful query language which makes it easy for the programming team to think about, talk about, and create and use databases that cater to text in a natural way.

  • Emdros is very fast, due to its underlying model of text.

  • Emdros's database model of text is generic, and supports almost any kind of text plus information about that text (markup, analyses, annotations, meta-data, etc.).

  • Emdros started out as being applicable especially in linguistics, corpus linguistics, and computational linguistics. However, its usefulness transcends these domains widely.

  • Emdros is Open Source and Free Software (Libre Software).

Commercial support

Commercial support for Emdros is available.

More information

See the "What is Emdros?" page for more information.

There is also a short paper explaining Emdros for linguists.

Latest news:

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May 10, 2019
News-item Released Emdros version 3.7.0
February 4, 2019
News-item Released Emdros version 3.7.0.pre04
November 30, 2018
News-item Released Emdros version 3.7.0.pre02
June 15, 2018
News-item Released Emdros version 3.6.0
April 7, 2018
News-item Released Emdros version 3.5.24
News-item Released Emdros version 3.5.25, including Windows binaries for x86.
News-item Released 64-bit Windows binaries for Emdros version 3.5.25
November 16, 2017
News-item Added newsletter signup form to our website.
January 31, 2017
News-item Released Emdros version 3.5.0
May 13, 2014
News-item Released Emdros version 3.4.0
July 4, 2011
News-item Released Emdros version 3.3.0
July 4, 2010
News-item Released Emdros version 3.2.0
August 15, 2009
News-item Released Emdros version 3.1.1, which brings support for gcc 4.4 (Fedora 11, Ubuntu 9.04, etc.), as well as bugfixes.
News-item Removed the legacy programmer's reference guide.
March 10, 2009
News-item Released Emdros version 3.1.0.
February 17, 2008
News-item Released Emdros version 3.0.1. ***PLEASE NOTE:*** Support for version 1.1.X has been discontinued.
January 27, 2008
News-item Released Emdros version 3.0.0. ***PLEASE NOTE:*** Support for version 1.1.X has been discontinued.
July 4, 2007
News-item Released Emdros version 1.2.0.pre262. The topographic part of the language has been expanded, C# bindings have been added, as has a TIGER XML importer.
March 10, 2007
News-item Released Emdros version 1.2.0.pre242. Speed improvements and User-Experience goodies, as well as bugfixes, abound.
February 7, 2007
News-item Released Emdros version 1.2.0.pre238. The most newsworthy thing in this release is the addition of a graphical import tool, of beta-quality at the moment.
January 25, 2007
News-item The search-capabilities of the site were restored.
January 21, 2007
News-item Released Emdros version 1.2.0.pre236. Only upgrade if you have problems with 1.2.0.pre234. Win32 and Linux binaries will be provided within the next few days.
January 20, 2007
News-item Released Emdros version 1.2.0.pre234. An upgrade is recommended for all users.
December 2, 2006
News-item Released Emdros version 1.2.0.pre231 on 2006-12-02.
November 21, 2006
News-item Emergence Consult is a company that provides commercial support for Emdros.
September 26, 2006
News-item Released Emdros version 1.2.0.pre225 on 2006-09-25.
August 30, 2006
News-item Released Emdros version 1.2.0.pre222.
August 16, 2006
News-item Released Emdros version 1.1.23.
News-item Released Emdros version 1.2.0.pre218.
April 27, 2006
News-item Released Emdros version 1.2.0.pre206. This release sees, among other things, NeGRA format import, improved Penn Treebank format import, and other goodies.
February 21, 2006
News-item Released Emdros version 1.2.0.pre195. This release sees, among other things, Penn Treebank format import, as well as a "chunking tool" example.
January 3, 2006
News-item Released version 1.3 of Tischendorf's 8th Greek New Testament as an example Emdros database. The text has morphology, Strong's numbers, and lemmas/lexemes.
December 14, 2005
News-item Gave the site a small overhaul.
News-item Tischendorf's 8th Greek New Testament released as an example Emdros database. The text has morphology, Strong's numbers, and lemmas/lexemes.
November 8, 2005
News-item There's a new Emdros blog entry.
News-item Preview 1.2.0.pre172 released.
November 2, 2005
News-item Reuploaded website; there was a glitch with the last upload that caused all subpages to be inaccessible from the front page.
October 25, 2005
News-item Released version 1.2.0.pre167. NOTE: This news was added on 2005-10-31.
October 1, 2005
News-item Released version 1.2.0.pre160.
September 13, 2005
News-item Released version 1.2.0.pre155.
July 12, 2005
News-item Released version 1.2.0.pre142, including full documentation and Windows installers.
May 31, 2005
News-item Released version 1.2.0.pre139.
April 28, 2005
News-item Released version 1.2.0.pre125, which adds online help and a treeview of the current database schema to the Emdros Query Tool.
April 21, 2005
News-item Released version 1.2.0.pre122, which adds a query tool and a HAL Space example.
News-item Released version 1.2.0.pre123, which fixes a bug in 1.2.0.pre122.
April 4, 2005
News-item Released version 1.2.0.pre117, which brings the Kleene Star operator to object blocks, and fixes a lot of bugs.
March 31, 2005
News-item Released version 1.2.0.pre106, which brings the NOT operator to object blocks, and fixes a lot of bugs.
February 28, 2005
News-item Added Thanks page.
February 25, 2005
February 8, 2005
News-item Released version 1.1.22, which is a security-related bugfix release.
February 4, 2005
News-item Added the Emdros Database Designer's Guide.
News-item Added this to the documentation page.
News-item Updated the FAQ.
News-item Updated the contact page to give the right home page.
January 21, 2005
News-item Preview version 1.2.0.pre83 made available.
January 15, 2005
News-item Preview version 1.2.0.pre81 made available.
News-item Preview version 1.2.0.pre82 made available.
December 18, 2004
News-item On December 5, I made preview version 1.2.0.pre80 available.
News-item The FAQ was rewritten.
October 24, 2004
News-item I have sold a license to Emdros to the German Bible Society.
News-item Added the Emdros is a proven technology page, with user testimonies.
October 11, 2004
News-item Emdros turns 3 years old today. Happy Birthday, Emdros!
September 23, 2004
News-item Emdros 1.2.0.pre79 made available. (Note: This news item was added at a later date.)
September 11, 2004
News-item Emdros 1.2.0.pre78 made available. Be sure to read the announcement before using!
September 7, 2004
News-item Emdros 1.1.20 released.
September 1, 2004
News-item I had a paper on Emdros at COLING 2004.
News-item Updated description of MQL, and placed references to the paper around the website.
May 29, 2004
News-item Emdros 1.1.19 released.
April 17, 2004
News-item Emdros 1.1.18 released.
News-item Emdros preview 1.2.0.pre54 was made available.
April 7, 2004
News-item Emdros 1.1.17 was released on April 5, 2004.
News-item Today, Emdros preview 1.2.0.pre52 was made available.
April 2, 2004
News-item Fixed a documentation-glitch in the Programmer's Reference Guide and its preview counterpart: CSet_of_monads::get_as_string() is now ToString().
March 24, 2004
News-item  Version 1.1.16 released. This is a compatibility release, adding support for (among other things) Debian woody and Debian sid.
News-item  The 1.1-branch has been declared stable.
March 6, 2004
News-item  Version 1.1.15 released. This is a bugfix release, fixing one major bug.
March 2, 2004
News-item  Version 1.1.14 released. This is a bugfix release, fixing three minor bugs, plus making two statements faster.
March 1, 2004
News-item Preview 1.2.0.pre40 made available! Topographic queries now use on average 43% less RAM, and are on average 8% faster. This is over 1.2.0.pre30, and on Windows. Linux sees about half that reduction.
February 23, 2004
News-item Preview 1.2.0.pre28 made available! Changes include a 14% speedup of queries on SQLite. Enumerations now return labels rather than values in GET FEATURES.
February 13, 2004
News-item Preview 1.2.0.pre30 made available! Topographic queries now use on average 26% less RAM.
January 14, 2004
News-item Preview 1.2.0.pre23 made available! Changes include speed improvements to three MQL statements.
December 16, 2003
News-item Preview 1.2.0.pre18 made available!
December 1, 2003
News-item Preview 1.2.0.pre16 made available!
November 17, 2003
News-item Version 1.1.13 released!
October 20, 2003
News-item Added MQL-Tutorial (PDF) to MQL and Docs-download pages.
July 7, 2003
News-item Version 1.1.12 released!
June 11, 2003
News-item Version 1.1.11 released!
May 10, 2003
News-item We haven't released a new version for almost two months. Instead, we have been making previews available. Until we make a new release, go grab the latest preview, compile, and enjoy.
March 17, 2003
News-item Version 1.1.10.fix1 released.
March 14, 2003
News-item Added download page.
News-item Wrote the "What is Emdros" introduction on the front page.
News-item Gave access to previews. Previews are sourcecode tarballs in between releases, and come with NO GUARANTEES.
February 27, 2003
News-item The Programmer's Reference Guide has a new section on libraries.
February 25, 2003
News-item Version 1.1.10 released!
News-item Updated FAQ page to reflect new SWIG bindings.
News-item Updated Programmer's Reference Guide in numerous ways.
December 11, 2002
News-item Version 1.1.9 released!
News-item Change to GPL license.
News-item Added licensing page.
November 27, 2002
News-item Version 1.1.8 released!
News-item The FAQ on "Is Emdros a single-user system?" has been updated to "Is Emdros concurrent?", since version 1.1.8 brings full concurrency to the table.
October 14, 2002
News-item Emdros Programmer's Reference Guide added.
News-item Docs page split into a new page on downloadable documentation and the remainder.
October 12, 2002
News-item We now have our own domain: emdros.org.
News-item Added search-facility.
News-item New version of the emdros-docs package (2002-10-12) put up for download. The MQL User's Guide is now finished! Check the ChangeLog and Release Notes for details.
    NOTE: The VACUUM DATABASE statement mentioned in the MQL User's Guide will appear in the next release of Emdros.
September 14, 2002
News-item New version of the emdros-docs package (2002-09-14) put up for download. The MQL User's Guide has been proofread up to and including Chapter 3, plus additional changes. Check the ChangeLog and Release Notes for details.
    NOTE: The VACUUM DATABASE statement mentioned in the MQL User's Guide will appear in the next release of Emdros.
September 9, 2002
News-item Complete redesign of website.
News-item Added section on the EMdF model.
News-item Expanded section on MQL.
News-item Added four new question-answers to the FAQ: "What is Emdros?", "What does 'Emdros' stand for?", "Which back-end should I choose?", and "How do I install PostgreSQL on Win32?".
August 15, 2002
News-item Version 1.1.7 released!
News-item Redid website to show wider applicability.
July 31, 2002
News-item Version 1.1.6 released!
News-item Added question to FAQ: "Do you provide Win32 binaries?".
News-item Added new document "Monad Sets" to docs page.