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.

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May 10, 2019

 Released Emdros version 3.7.0

February 4, 2019

 Released Emdros version 3.7.0.pre04

November 30, 2018

 Released Emdros version 3.7.0.pre02

June 15, 2018

 Released Emdros version 3.6.0

April 7, 2018

 Released Emdros version 3.5.24
 Released Emdros version 3.5.25, including Windows binaries for x86.
 Released 64-bit Windows binaries for Emdros version 3.5.25

November 16, 2017

 Added newsletter signup form to our website.

January 31, 2017

 Released Emdros version 3.5.0

May 13, 2014

 Released Emdros version 3.4.0

July 4, 2011

 Released Emdros version 3.3.0

July 4, 2010

 Released Emdros version 3.2.0

August 15, 2009

 Released Emdros version 3.1.1, which brings support for gcc 4.4 (Fedora 11, Ubuntu 9.04, etc.), as well as bugfixes.
 Removed the legacy programmer's reference guide.

March 10, 2009

 Released Emdros version 3.1.0.

February 17, 2008

 Released Emdros version 3.0.1. ***PLEASE NOTE:*** Support for version 1.1.X has been discontinued.

January 27, 2008

 Released Emdros version 3.0.0. ***PLEASE NOTE:*** Support for version 1.1.X has been discontinued.

July 4, 2007

 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

 Released Emdros version 1.2.0.pre242. Speed improvements and User-Experience goodies, as well as bugfixes, abound.

February 7, 2007

 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

 The search-capabilities of the site were restored.

January 21, 2007

 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

 Released Emdros version 1.2.0.pre234. An upgrade is recommended for all users.

December 2, 2006

 Released Emdros version 1.2.0.pre231 on 2006-12-02.

November 21, 2006

 Emergence Consult is a company that provides commercial support for Emdros.

September 26, 2006

 Released Emdros version 1.2.0.pre225 on 2006-09-25.

August 30, 2006

 Released Emdros version 1.2.0.pre222.

August 16, 2006

 Released Emdros version 1.1.23.
 Released Emdros version 1.2.0.pre218.

April 27, 2006

 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

 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

 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

 Gave the site a small overhaul.
 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

 There's a new Emdros blog entry.
 Preview 1.2.0.pre172 released.

November 2, 2005

 Reuploaded website; there was a glitch with the last upload that caused all subpages to be inaccessible from the front page.

October 25, 2005

 Released version 1.2.0.pre167. NOTE: This news was added on 2005-10-31.

October 1, 2005

 Released version 1.2.0.pre160.

September 13, 2005

 Released version 1.2.0.pre155.

July 12, 2005

 Released version 1.2.0.pre142, including full documentation and Windows installers.

May 31, 2005

 Released version 1.2.0.pre139.

April 28, 2005

 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

 Released version 1.2.0.pre122, which adds a query tool and a HAL Space example.
 Released version 1.2.0.pre123, which fixes a bug in 1.2.0.pre122.

April 4, 2005

 Released version 1.2.0.pre117, which brings the Kleene Star operator to object blocks, and fixes a lot of bugs.

March 31, 2005

 Released version 1.2.0.pre106, which brings the NOT operator to object blocks, and fixes a lot of bugs.

February 28, 2005

 Added Thanks page.

February 25, 2005

 Preview version 1.2.0.pre84 and 1.2.0.pre85 made available.

February 8, 2005

 Released version 1.1.22, which is a security-related bugfix release.

February 4, 2005

 Added the Emdros Database Designer's Guide.
 Added this to the documentation page.
 Updated the FAQ.
 Updated the contact page to give the right home page.

January 21, 2005

 Preview version 1.2.0.pre83 made available.

January 15, 2005

 Preview version 1.2.0.pre81 made available.
 Preview version 1.2.0.pre82 made available.

December 18, 2004

 On December 5, I made preview version 1.2.0.pre80 available.
 The FAQ was rewritten.

October 24, 2004

 I have sold a license to Emdros to the German Bible Society.
 Added the Emdros is a proven technology page, with user testimonies.

October 11, 2004

 Emdros turns 3 years old today. Happy Birthday, Emdros!

September 23, 2004

 Emdros 1.2.0.pre79 made available. (Note: This news item was added at a later date.)

September 11, 2004

 Emdros 1.2.0.pre78 made available. Be sure to read the announcement before using!

September 7, 2004

 Emdros 1.1.20 released.

September 1, 2004

 I had a paper on Emdros at COLING 2004.
 Updated description of MQL, and placed references to the paper around the website.

May 29, 2004

 Emdros 1.1.19 released.

April 17, 2004

 Emdros 1.1.18 released.
 Emdros preview 1.2.0.pre54 was made available.

April 7, 2004

 Emdros 1.1.17 was released on April 5, 2004.
 Today, Emdros preview 1.2.0.pre52 was made available.

April 2, 2004

 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

  Version 1.1.16 released. This is a compatibility release, adding support for (among other things) Debian woody and Debian sid.
  The 1.1-branch has been declared stable.

March 6, 2004

  Version 1.1.15 released. This is a bugfix release, fixing one major bug.

March 2, 2004

  Version 1.1.14 released. This is a bugfix release, fixing three minor bugs, plus making two statements faster.

March 1, 2004

 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

 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

 Preview 1.2.0.pre30 made available! Topographic queries now use on average 26% less RAM.

January 14, 2004

 Preview 1.2.0.pre23 made available! Changes include speed improvements to three MQL statements.

December 16, 2003

 Preview 1.2.0.pre18 made available!

December 1, 2003

 Preview 1.2.0.pre16 made available!

November 17, 2003

 Version 1.1.13 released!

October 20, 2003

 Added MQL-Tutorial (PDF) to MQL and Docs-download pages.

July 7, 2003

 Version 1.1.12 released!

June 11, 2003

 Version 1.1.11 released!

May 10, 2003

 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

 Version 1.1.10.fix1 released.

March 14, 2003

 Added download page.
 Wrote the "What is Emdros" introduction on the front page.
 Gave access to previews. Previews are sourcecode tarballs in between releases, and come with NO GUARANTEES.

February 27, 2003

 The Programmer's Reference Guide has a new section on libraries.

February 25, 2003

 Version 1.1.10 released!
 Updated FAQ page to reflect new SWIG bindings.
 Updated Programmer's Reference Guide in numerous ways.

December 11, 2002

 Version 1.1.9 released!
 Change to GPL license.
 Added licensing page.

November 27, 2002

 Version 1.1.8 released!
 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

 Emdros Programmer's Reference Guide added.
 Docs page split into a new page on downloadable documentation and the remainder.

October 12, 2002

 We now have our own domain: emdros.org.
 Added search-facility.
 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

 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

 Complete redesign of website.
 Added section on the EMdF model.
 Expanded section on MQL.
 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

 Version 1.1.7 released!
 Redid website to show wider applicability.

July 31, 2002

 Version 1.1.6 released!
 Added question to FAQ: "Do you provide Win32 binaries?".
 Added new document "Monad Sets" to docs page.