Jena accepted by the Apache Incubator

Jena has been accepted into the Apache incubator.  That's the easy part - now we have to sort out the legal side, migrate the codebase and set up the new project infrastructure.  This can take some time.

This does not mean we're not doing the usual releases.  We will continue to release Jena and it's related components as non-Apache releases in parallel.


The proposal we made can be found at: http://wiki.apache.org/incubator/JenaProposal
 

Jena at SemTech 2010

For those of you going to SemTech in San Francisco at the end of June, there is a chance to meet up to discuss Jena and things you have done with it.

This will be on the afternoon of Wednesday June 23rd, starting at 15.15

If you would like to include a demo or presentation about work you have done with Jena please let us know (mailto:semtech@openjena.org), with a brief description of what you like to present. Please indicate whether a five minute or twenty minute slot would be more appropriate.

This is intended to be informal and easy-going- there wil also be plenty of time for discussions and meeting Jena users and Jena developers.

Releases Jena 2.6.3, ARQ 2.8.4 and TDB 0.8.6

This is the first release of the Jena main distribution, after the majoritiy of the developers time at HP.

As we move forward as an independent open source project, we are always looking for contributions: send them to the patch tracker on SourceForge.

• Jena 2.6.3 download
• ARQ 2.8.4 download
• TDB 0.8.6 download

They are also available from the central Maven repository and our own:

• Jena maven repository

For snapshots, we also have a development repository:

• Jena development maven repository

OpenJena

The Jena platform will become an independent open source project from the end of October. Many current members of the Jena team will remain involved in further enhancements to the Jena codebase, including supporting the user community such as jena-dev mailing list.

We have a new server

http://openjena.org/

The server is kindly provided by Talis for which we are very grateful.

The code will remain licensed under a BSD-style license and, with HP's support and assistance, we are in discussions to transfer the copyright to a neutral, non-profit, organisation.

The development process remains on SourceForge, including the main download area and development CVS and SVN repositories. The change to an independent open source project will enable us to continue and expand the core developer community, and will make it easier to accept contributions through the SourceForge patches tracker. The main download area and development CVS and SVN repositories remain on SourceForge. We have no plans to change the package naming, aiming to minimise any changes to Jena users.

We would like to thank all of the various customers, users, research groups and individual contributors we have worked with over the years as we have built the Jena platform to its current state and hope we will continue working togther as the project moves to a new phase. We look forward to future enhancements to Jena's capability, and to helping to create other exciting developments in Semantic Web technologies and products.

The Jena Team

New releases: Jena 2.6.2 and ARQ 2.8.1

New releases of Jena and ARQ are available: these are primarily maintenance releases but do use a new build system.

• Jena 2.6.2 download
• ARQ 2.8.1 download

They are also available from our Maven repository

• Jena maven repository

You only need to download one of these to get jars. The Jena
distribution contains the source, javadoc and test materials for Jena;
the ARQ distribution contains the source, javadoc and test materials for
ARQ.

Releases: SDB 1.3.0 and TDB 0.8.1

New releases, compatible with Jena 2.6.0:

• SDB 1.3.0
• TDB 0.8.1

Both are avilable from the Jena development maven repository.

Note that TDB 0.8 is not compatible with TDB 0.7.X - there is a TDB 0.7.6 release that is the same as TDB 0.8.1 except it is compatible with all TDB 0.7 releases.

New releases: Jena 2.6.0 and ARQ 2.7.0

• Jena 2.6.0
• ARQ 2.7.0

These releases move Jena to using Java 5 and, in particular, Java generics, both internally and in the application APIs. We have also cleared out many deprecated features, switched to using SLF4J as the logging wrapper and reduced the number of jars by using features of Java 5.

There is also a RC release of TDB 0.8.0 which uses this upgraded Jena. Caveat: the file format for TDB 0.8 is different to that for TDB 0.7.x and earlier.

Release: TDB 0.7

• Download: TDB 0.7.1
• TDB Documentation

TDB 0.7 introduces new features:

• Named graph support - Native TDB support for RDF datasets
• Persistent RDF namespace prefixes
• Reification: Support for Reification style standard

The code is also available via maven and Apache ant/ivy:

Repository: http://jena.hpl.hp.com/repo-dev/
GroupId/Org: com.hp.hpl.jena
ArtifactId/Name: tdb

In addition, there has been significant internal changes to prepare for future work. Performance testing of the new architecture shows that when used the same way as 0.6, TDB performs at the same speed.

Named graphs are not as fast to load as the default graph in the dataset.

New release: SDB 1.2

• Download: SDB 1.2.0
• SDB Documentation

SDB 1.2 is primarily a maintenance release. It does include support for MS SQL Server 2008

There are no changes to the database schemas.

The code is also available via maven and Apache ant/ivy:

Repository: http://jena.hpl.hp.com/repo/
GroupId/Org: com.hp.hpl.jena
ArtifactId/Name: sdb

New Release: Eyeball 2.1

Chris has announced a new version of Eyeball. Eyeball is a tool for detecting problems with RDF data: misconstructed URIs, classes and properties with no definition, mis-spelled literals, etc. Eyeball is extensible: you can write your own Inspectors and have Eyeball apply them to your data.