News

The Lemur Toolkit is transitioning from lemurproject.org to SourceForge.net for various project services. Visit The Lemur Toolkit to see project's pages. The first item we will transition is the announcements mailing list. Subsequently we will transition the discussion forum, CVS for the Lemur Toolkit and Indri, and the tracking system for bugs, feature requests, and support.

Bug Submissions, Feature Requests and Support

As part of the migration of portions of the Lemur Toolkit to SourceForge, we have recently opened up bug tracking, feature requests, and support requests so that you can directly submit these items to us, the developers.

Browsing of bugs, feature requests and support requests are open to anyone, but if you wish to add a bug, feature request, or support request, you need to have an account on SourceForge. If you need to create an account, you can create one here.

Release Schedule

12/21/2007: Lemur Toolkit version 4.6 and Indri version 2.6 released!

Current Release Notes:

4.6 includes changes to the keyed file package that are not backwards compatible with previous versions. All KeyfileIncIndexes and indri indexes will need to be rebuilt.
4.6 corrects various issues in the 4.5 distribution package, and fixes 20 bugs with the 4.5 release. See the release notes for complete details.
Applications compiled with the Lemur Toolkit require the following libraries: z, iberty, pthread, and m on linux, and additionally socket and nsl on solaris. Applications built in Visual Studio require the additional library wsock32.lib. The java jar files were built with Java 5 (jdk 1.5.0). We have tested using GCC 3.2 (solaris), 3.2.2(linux), 3.4(linux), 3.4.3(linux x86_64), 4.0.2(linux), VC++ .NET 7.1(Windows XP), and Visual Studio 2005 (Windows XP).

Known Problems:

This is a list of bugs and known problems with the current version of Lemur (4.6) and Indri (2.6). Many problems have fixes or workarounds that are posted on the forum. There may also be open bug tickets issued on sourceforge, see https://sourceforge.net/tracker/?group_id=161383&atid=819615 for the complete tickets. Please check there if you do not see something here.

No known problems currently exist.

Enhancements (4.6):

Feature Request 1840290: PRF at the passage level.
Modify the RMExpander to use the RelevanceModel class, enabling passage level pseudo-relevance feedback. If the query to expand contains an extent restriction, the resultant expanded query will also contain that extent restriction.
Feature Request 1760464: Windows linking fix.
Add the /Zl (Omit default library name) flag to the VS 2005 library project files.
Keyfile: keyfile package update.
FileClassEnvFactory: add trecchar file class to provide character at a time indexing of trec format documents.
Query evaluation/annotation speed improvements (indri query language):
1. The children of UnorderedWindowNode now get sorted at the beginning of evaluation which can lead to a quicker exit from the node evaluation if any of the terms are not found in the children.
2. Nodes which can have extent parent, child or sibling interactions now have optimizations (which are rank-preserving) for speeding up queries via an early exit if the parent/child relationship criteria are not met during the query.
Heritrix Web Crawler in site search component has been updated to version 1.12.1.
Field support for the lemur::api::Index class (to get at indri fields from the Lemur API in addition to using the Indri API).
Java UI Updates: A new tab has been added to both the Lemur Indexing UI and the Indri Indexing UI to allow the addition of named fields to be built in the index. Futhermore, there are now options to add offset annotation files for each of the input data files. There is also a field to allow the addition of anchor text data (as gathered via harvestLinks). On the Lemur Indexing UI, a new field has also been added to allow a list of metadata fields to be indexed as well.

The Lemur Project
Last modified:December 19, 2007. 13:44:23 pm