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 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:

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.