We just release a new version of our Web application plugin Triplify, which exposes structured data from relational databases as Linked Date, RDF, and JSON. This release contains a number of bugfixes and impovements. Most notable the compatibility with PHP4 was improved and the possibility to add meta-data to your RDF added.

These are the changes in V0.3 (08-04-2008):
* added owl:imports statement importing the vocabulary
* added rdfs:comment about generator
* configuration variable “register” added
* Syntax for indicating objectProperties added:
SELECT id,user_id ’sioc:has_creator->user’
* Configuration variable $triplify[’cachedir’] added
* proper UTF8 encoding of literals added (thanks to Rolf Strathewerd)
* Configuration variable $triplify[’license’] added
* Configuration variable $triplify[’LinkedDataDepth’] added
* Configuration variable $triplify[’metadata’] added
* Configuration variable $triplify[’CallbackFunctions’] added

After a first preview release a couple of weeks ago we worked hard to prepare a first public release of Triplify. We fixed a number of bugs and added several additional features, some example configurations for popular Web applications were created and the Web site was completely overhauled: Michael Haschke created the new Triplify logo as well as the design and most other visuals on the site. For those who missed the first Triplify announcement:

Triplify enables the effortless “semantification” of Web applications. Triplify is a small plugin for Web applications, which reveals the semantic structures encoded in relational databases by making database content available as RDF, JSON or Linked Data.

Triplify is very light weight: It consists just of few files with less than 500 lines of code. For a typical Web application a configuration for Triplify can be created in less than one hour and if this Web application is deployed multiple times (as most open-source Web applications are) the configuration can be reused without modifications.

Triplify makes Web applications easier mashable and lays the foundation for next generation, semantics based Web searches.

More infos, the software release, some example configurations for OpenConf, Open Journal Systems, WackoWiki, WordPress and Drupal are available from: http://triplify.org

xOperator combines advantages of social network websites with instant messaging. It tries to be a semantic agent for xmpp / jabber network which finds and shares content about resources (using RDF/SPARQL) for you and your jabber friends.

The first public version of xOperator is now available for dowload. It includes the following features:

• basic xmpp account management (user account, proxy account)
• management of query templates, datastores and namespaces directly with your jabber client
• simple query templates for easy starting with xOperator
• query scripts in groovy for advanced queries and post processing

Links: Homepage, Changelog, Mailing list

Hereby, we announce the availability of DL-Learner Build 2008-02-18, the second DL-Learner release. DL-Learner is a tool for learning complex classes from examples and background knowledge. It extends Inductive Logic Programming to Description Logics and the Semantic Web.

Downloads are available at the sf.net project page. For a list of the most important changes since the last release (Build 2007-08-31), see the Changelog. Most notably, DL-Learner now has a flexible component based design, which allows to extend it easily with new learning algorithms, learning problems, reasoners, and supported background knowledge sources. A new type of supported knowledge sources are SPARQL endpoints, from which DL-Learner can extract knowledge fragments, which enables learning classes even on large knowledge sources like DBpedia. Furthermore, DL-Learner now supports learning from positive examples only, inclusion axiom learning, the usage of N-Triple files as background knowledge, the OWL API reasoner interface, and has a more powerful web service interface. I’d like to thank Sebastian Hellmann, Sebastian Knappe, and Tilo Hielscher for their support.

OntoWiki 0.8 is now available for download. Changes in this release include

• A complete new default theme with smarter html structure and a desktop like style with windows and menus
• Statement Based Access Control (experimental)
• Improved RDF/XML exporter for resources and models
• Support for hidden classes
• Several GUI enhancements (see a complete list in the changelog)

Additionally, we’ve released the second version of our OntoWiki Command Line Interface (owcli). owcli is a php-based command line tool to administrate and manipulate OntoWiki Knowledge Bases. Changes in release 0.2 include:

• Support for SPARQL queries (table and graph output)
• bash autocompletion
• New commands for content subscriptions, geocoding and much more

You can download OntoWiki and owcli in our SF File Section.