Sesame 2.1 adds support for storing RDF data in a relational database using the RDBMS Sail. Currently, MySQL and PostgreSQL are supported. MySQL version 5.0 and PostgreSQL versions 8.2 and 8.3 have been tested, but the implementation will probably also work on other versions. Please let us know about other RDBMS versions that do or do not work. As usual, this release also includes a number of bug fixes, see the release notes for details.

Maven users, please note that the Sesame maven artifacts have been renamed to be able to distinguish between the various OpenRDF projects. The groupId for Sesame artifacts has been changed to org.openrdf.sesame, and all openrdf- prefixes have been changed to sesame- prefixes. Finally, the new artifacts are now available from our brand new maven repository.

rdf:seeAlso:

• Change log
• Sesame User Guide (also available as one large HTML file)
• Sesame API javadoc
• distribution files

Elmo 1.0-rc2 is now released. It includes better handling of class-loaders and improved class mapping. This version now allows annotations to be placed on concrete classes (for merging) and adds setType and setQName methods to ElmoQuery. Many reported bugs have been fixed and a GA release is expected soon so keep on sharing your comments.

Available resources:

• release documentation
• distribution files

Elmo 1.0-rc1 has just been released. This release fixes many bugs that have been reported in beta2 and includes improvements both above and below the surface. Included in this release is better support for HTTP repositories, improved support for ontology and concept generation, and support for abstract behaviours. It is built on the stable 2.0.1 version of Sesame.

This release marks the beginning of the end to the long awaited 1.0 release and it is expected to be relatively short. Please grab a copy and put it through rigorous testing and report back in the forum. Thanks to everyone who reported bugs and made suggestions - the release is much better for it.

Available resources:

• release documentation
• distribution files

Sesame 2.0.1 fixes a number of bugs that have been found in 2.0, but contains some improvements too. First of all, the last two SPARQL issues have been resolved, which means that Sesame now passes the complete SPARQL compliance test suite. Second, we corrected a bug that seriously affected query optimization for the memory store. The update performance of the memory store has been improved too. Finally, some general query model optimizations have been implemented, which should improve the query performance of some queries on both the native store and the memory store.

The complete change log can be found here.

Available resources:

• Sesame User Guide (also available as one large HTML file)
• Sesame API javadoc
• distribution files

The SPARQL query language, protocol and query result format have been promoted to the W3C recommendation status yesterday. More info is available in the official press release.

Unfortunately the W3C press release references an outdated overview of SPARQL implementations where Sesame fails to comply to a considerable number of SPARQL features. As standard compliance is very important to us, we want to make clear that Sesame currently is 99% SPARQL compliant and that the remaining incompatibilities will be corrected soon.

Thanks to an overwhelming number of people that have tested the previous release candidates and reported any issues that surfaced, we can now proudly present Sesame, version 2.0!

After the second release candidate, only one serious issue was reported and fixed. We found and fixed some minor, non-critical issues ourselves and made some small improvements here and there, mostly related to HTTP communication and OpenRDF Workbench. All in all, we think the code is now sufficiently tested to call it 2.0-final.

The development focus will now shift to performance and scalability improvements. An RDBMS-based Sail implementation is currently under development and the first results look very promising. The performance of the native- and memory stores will also be improved. As there hasn't been put a lot of effort into this so far, we expect to achieve good results here.

The complete change log can be found here.

Available resources:

• Sesame User Guide (also available as one large HTML file)
• Sesame API javadoc
• distribution files

Elmo 1.0-beta2 is now released. This version is built on the much improved Sesame 2.0-rc2. The stack is more stable and has seen changes in transactions, datasets and entity creation. The API has had some clarifications, so note some of the changes and enjoy the release.

References:

• Elmo User Guide (also available as PDF or one large HTML file)
• API reference
• Source reference
• distribution files

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