Jena announce

Jena accepted by the Apache Incubator

noreply@blogger.com (AndyS) — 2010-11-28T07:58:54-08:00

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

noreply@blogger.com (AndyS) — 2010-06-02T06:27:55-07:00

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

noreply@blogger.com (AndyS) — 2010-06-02T06:23:10-07:00

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.

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

noreply@blogger.com (AndyS) — 2009-10-22T03:13:46-07:00

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

noreply@blogger.com (AndyS) — 2009-10-22T03:09:12-07:00

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

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

noreply@blogger.com (AndyS) — 2009-06-22T14:48:16-07:00

New releases, compatible with Jena 2.6.0:

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

noreply@blogger.com (AndyS) — 2009-05-25T12:13:35-07:00

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

noreply@blogger.com (AndyS) — 2009-01-19T06:02:28-08:00

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

noreply@blogger.com (AndyS) — 2009-01-19T06:01:19-08:00

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

noreply@blogger.com (AndyS) — 2008-12-22T09:43:13-08:00

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.

Jena 2.5.7, ARQ 2.6.0

noreply@blogger.com (AndyS) — 2008-12-19T12:12:42-08:00

This is a linked release - Jena 2.5.7 contains ARQ 2.6.,0 and ARQ 2.6.0 ships with the jars for Jena 2.5.7. The difference is mainly the source code included.

New Release: ARQ 2.5 and TDB 0.6

noreply@blogger.com (AndyS) — 2008-10-28T15:39:13-07:00

This release of TDB introduces a statistics based optimizer for filtered basic graph patterns.

The release of ARQ is coupled with the release of TDB to provide enhanced integration into the query execution process for custom storage layers. It also provides any bug fixes done since the last release.

New releases: ARQ 2.4, Joseki 3.2, TDB 0.5

noreply@blogger.com (AndyS) — 2008-10-28T15:38:50-07:00

The release of ARQ 2.4 introduces property paths. It also includes some internal simplification for making extensions to ARQ at the basic graph pattern level (a defined extension point for SPARQL) for different storage and logic engines. This simplified extension for basic graph pattern matching is used by TDB 0.5.

This is the first release for TDB. Documentation on the TDB wiki.

The release of Joseki 3.2 is an accumulation of many improvements since version 3.1. Some of these make the use of SDB and TDB with Joseki possible with the released version, not just with development CVS.

New releases: Jena 2.5.6, ARQ 2.3 and SDB 1.1

noreply@blogger.com (AndyS) — 2008-12-19T12:13:53-08:00

A common theme in these releases is improvements in the implementations of SPARQL/Update and extending it with a first-release implementation for SDB. The extended SPARQL also includes two ARQ extensions for assignment and sub-query.

Jena available via Maven

noreply@blogger.com (AndyS) — 2008-02-26T06:00:15-08:00

Jena is available as Maven artifacts. The Jena repository for released versions is http://jena.hpl.hp.com/repo and this is synchronized with the central Maven2 repository as http://repo1.maven.org/maven2/com/hp/hpl/. The artifacts include Jena and ARQ jar files, the Jena IRI library and associated software used by Jena which is distributed in source form.

Jena 2.5.5 and ARQ 2.2

noreply@blogger.com (AndyS) — 2008-02-19T11:42:27-08:00

There are new releases of Jena and ARQ:

The versions of ARQ in the Jena download and version of Jena in the ARQ download are sync'ed to these releases. You only need download one of them to get the jars for both new versions. The different downloads contain different additional material such as source code.

SDB 1.0

noreply@blogger.com (AndyS) — 2007-12-07T07:12:44-08:00

SDB is a SPARQL database subsystem for Jena. It provides for large scale storage and query of RDF datasets using conventional SQL databases. The database tools for load balancing, security, clustering, backup and administration can all be used to manage the installation.

Supported databases:

Oracle, 10gR2 & 11g including Oracle Express
IBM DB2 9 including DB Express
Microsoft SQL Server 2005 including SQL Server Express
PostgreSQL v8
MySQL 5.0 (>=5.0.22)
HSQLDB 1.8
Apache Derby 10.2

Download: http://downloads.sourceforge.net/jena/sdb-1.0.zip

Homepage:http://jena.sf.net/SDB

Documentation: http://jena.hpl.hp.com/wiki/SDB

We are actively seeking feedback on SDB - both good and bad. If it works, please tell us - if it doesn't work, please tell us!

Jena 2.5.4 and ARQ 2.1

noreply@blogger.com (AndyS) — 2007-09-19T13:26:03-07:00

There are new releases of Jena and ARQ:

This is a co-ordinated release because this version of Jena introduces some low-level features that work with ARQ query planning to optimize the performance of large in-memory graph query.

The versions of ARQ in the Jena download and version of Jena in the ARQ download are sync'ed to these releases. You only need download one of them to get both new versions.

Also new in ARQ 2.1, as SPARQL extensions:

GROUP BY and Counting
The SERVICE keyword - call-out to another query service

ARQ 2.1 beta

noreply@blogger.com (AndyS) — 2007-08-22T13:14:17-07:00

The main feature of this release is the introduction of a cost-based optimizer for in-memory basic graph patterns. For queries that involve a large amount of searching of possibilities, the optimizer can greatly improve execution times by choosing the best order in which to execute the triple patterns in a basic graph pattern. The estimation is based on statistics that the underlying store has gathered but the framework also provides for the statistics gathered by studying the dataset itself to produce more detailed statistics. The optimizer is developed by Markus Stocker.

Jena tutorial on DevX

noreply@blogger.com (Ian) — 2007-07-24T03:25:58-07:00

DevX have published an introductory tutorial on Jena's Model abstraction.

del.icio.us: jena, programming, semantic-web, tutorial

Jena User Conference: call for participation

noreply@blogger.com (Ian) — 2007-07-14T05:31:39-07:00

Registration is open for the 2007 Jena User Conference. Early registration actually closes today, but normal registration remains open for a few more weeks yet. Please note the deadline of August 1st for all registrations, which we need in order that we can give firm numbers to the hosting venue.

SDB Beta 1

noreply@blogger.com (AndyS) — 2007-07-08T04:56:08-07:00

In this release:

support for named graphs
included support for Oracle 10gR2, including Oracle Express

Download: http://downloads.sourceforge.net/jena/SDB-0.0-beta-1.zip

Homepage: http://jena.sf.net/SDB

Documentation: http://jena.hpl.hp.com/wiki/SDB

Databases supported are now:

Oracle 10gR2 including Oracle Express
Microsoft SQL Server 2005 including SQL Server Express
PostgreSQL v8
MySQL 5.0 (>=5.0.22)
HSQLDB 1.8
Apache Derby 10.2

Microsoft SQL server 2000 has been reported to work as well.

New Release: Jena 2.5.3

noreply@blogger.com (AndyS) — 2007-06-21T06:46:27-07:00

We've announced another maintenance release of Jena 2.5.

Jena User Conference 2007: submission deadline extended

noreply@blogger.com (Ian) — 2007-05-08T08:40:46-07:00

The submission deadline for the 2007 Jena User Conference has been extended to May 27th 2007. So, plenty of extra time to get those Jena position papers put together ... noting that only two page abstracts are needed for the submissions process.

Announcement: Second Jena User Conference

noreply@blogger.com (Ian) — 2007-03-20T08:04:49-07:00

We're pleased to announce the 2007 Jena User Conference, to be held in Palo Alto, California on September 5th and 6th. Chris posted the details earlier today. Submissions are now invited for papers and demos to be presented at the conference. Last year's user conference was a lot of fun, this year we're hoping for bigger and better!

del.icio.us: semanticweb, jena, conference, cfp