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Apache Lucy inaugural release 0.1.0 (incubating)

by creamygoodness (Curate)
on Jun 02, 2011 at 20:23 UTC ( #907882=perlnews: print w/replies, xml ) Need Help??


We are pleased to annouce the inaugural release of Apache Lucy, version 0.1.0!

Apache Lucy is full-text search engine library written in C and targeted at dynamic languages. The initial release provides Perl bindings.

Lucy is a "loose C" port of Apache Lucene, a search engine library for Java -- it is similar in purpose to Lucene, but designed to take advantage of C's unique capabilities.

For more information, please visit the Apache Lucy website:

Lucy is also available from CPAN:


Apache Lucy is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.


The Apache Lucy development team:

Chris Hostetter
Marvin Humphrey
Peter Karman
Nathan Kurz
Chris Mattmann
Mike McCandless
David E. Wheeler
Simon Willnauer

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Re: Apache Lucy inaugural release 0.1.0 (incubating)
by Your Mother (Archbishop) on Jun 03, 2011 at 18:45 UTC

    ++ to everyone of course; would you please speak to the future/plans for KinoSearch. The Lucy interface looks pretty much the same as KS right now. Does that mean KS is to be deprecated and Lucy is to be preferred? If not now, when?

      Apache Lucy 0.1.0 provides an effectively identical feature set to KinoSearch 0.3x. Now that Lucy has been released, KinoSearch will be deprecated, and all new userland code should use Lucy instead. The project has moved, and all subsequent development will happen at our new home.

      The Lucy project at Apache was rebooted last July, entering the Incubator with the intent of assimilating the KinoSearch code base and community. At the time, it was not yet clear that we would be able to use all of KinoSearch; a lot of IP clearance work had yet to be done.

      As an (incubating) Apache product, Lucy must be released under the attribution-based, permissive Apache License 2.0. As the terms of this license are more liberal than the terms of the GPL/Artistic-1.0 licensing under which KinoSearch was developed, it was necessary to perform several steps before we could release:

      • Audit the project's IP history, identifying all parties with an IP stake in the code base.
      • Contact all past contributors.
      • Organize a collective software grant to relicense the code to the Apache Software Foundation.
      • Expunge contributions for which permission to relicense cannot be obtained.
      • Remove or replace dependencies with incompatible licensing.

      Fortunately, we were able to identify, contact and obtain permission from every last contributor, allowing us to start with KinoSearch in its entirety. Then we were able to replace a number of problematic dependencies without damaging the library's interface or functionality.

      We still depend on JSON::XS and Parse::RecDescent, for which we assert usage under the terms of the Artistic License 1.0. As Artistic-1.0 is not formally approved by Apache legal affairs for use by Apache products, we are required to replace those dependencies as well prior to graduating from the Incubator to become a top-level Apache project. However, projects under incubation are held to a slightly lower standard, and we were able to secure a temporary dispensation allowing us to release.

      It took a long time and a lot of work to get to this point -- and thank goodness that such work only has to be done once. Now that Lucy has been officially released, though, it is safe to send KinoSearch off into quiet retirement.

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