Author Archives: Matthew Tatem

Using Greasemonkey for converting wikipedia to

Download greasemonkey from here once installed you will need to use the link below to install the dbpedia user script that will convert wikipedia pages into dbpedia urls.

DBpedia UserScript – enhances Wikipedia pages with links to their corresponding DBpedia page

The DBpedia User Script is a Greasemonkey script that enhances Wikipedia pages with a link to their corresponding DBpedia page.

Install the DBpedia UserScript

The DBpedia User Script adds a tiny DBpedia image () which is linked to DBpedia next to the page title of any Wikipedia page.

2. Installation

2.1. Firefox

If you like to install the DBpedia User Script for Firefox, you need to install Greasemonkey. Greasemonkey is an extension for Mozilla Firefox, an open source Web Browser.
After installation (which requires restarting your browser), you are now ready to install the DBpedia User Script.

Now clicking on the Install link above triggers Greasemonkey to pop up the script installation panel. Greasemonkey shows you a list of what sites the script will run on and ask if you want to install the script.

Now loading Wikipedia pages results in the DBpedia User Script being run.

2.2. Safari

If you like to install the DBpedia User Script for Safari, you need to install GreaseKit. Grease Kit is a SIMBL plugin for Mac OS.

2.3. Opera

If you like to install the DBpedia User Script for Opera, read Opera’s scripting guide.

Using WADE in Eclipse using WOLF Plugin

WADE is a software platform based on JADE that provides support for the execution of tasks defined according to the workflow metaphor. The key component of the WADE platform is the WorkflowEngineAgent class that extends the basic Agent class of the JADE library embedding a small and lightweight workflow engine. Besides normal JADE behaviours, a WorkflowEngineAgent is therefore able to execute workflows represented according to a WADE specific formalism. This formalism is based on the Java language: a WADE workflow is actually a Java class with a well defined structure. This approach makes it possible to combine the expressiveness of the workflow metaphor with the power of a programming language such as Java, and enables the usage of workflows for system internal logics definition.

In principle WADE supports “notepad-programming” in the sense that there is no hidden stuff that developers can’t control. However, especially considering that one of the main advantages of the workflow approach is the possibility of representing processes in a friendly graphical form, WADE comes with a development environment called WOLF that facilitates the creation of WADE-based application. WOLF is an Eclipse plug-in and as a consequence allows WADE developers to exploit the full power of the Eclipse IDE plus additional WADE-specific features.

Go to the WADE Website to Download WADE & WOLF

To install WOLF in Eclipse…. download the zip files for the plugin to your local system.

You must register before you can download the files, if you already registered to download JADE you can use that account to login.

Extract the contents of the zip files into the Eclipse plugin directory where you installed Eclipse on your system. (Make sure to extract the actual plugin in the plugin folder of the zip file to the plugin folder inside of eclipse.) This needs to be done as a manual installation according to the instructions for installing WADE

Read Chapter 1.1: WADE Installation Tutorial or see below

As mentioned WOLF is an Eclipse plugin and therefore it is necessary to have Eclipse version 3.3 (Europa) or later already installed. Actually versione 3.4 is suggested as it fixes some bugs that may create annoying problems when using WOLF. Furthermore WOLF makes use of the GEF (Graphical Editing Framework) plugin for graphic rendering version 3.3 or later that must be
installed too. Both Eclipse and GEF can be downloaded from the Eclipse website at
At this point the easiest way to install WOLF is unzipping the WOLF distribution zip file (available for download from the WADE website at into the Eclipse home directory. Refer to the Eclipse documentation for more details about plugins installation.
If a previous version of WOLF is already installed, it is necessary to remove it from the Eclipse plugins directory (by simply deleting the subdirectory related to WOLF) before installing the new one. Both WADE and WOLF require Java 5 or later.

Additional  articles related to WADE:

Read about WADE: A software platform to develop mission critical applications exploiting agents and workflows

Read more about WADE and how it works

SQLite Database Browser

SQLite Database Browser Website

What it is

SQLite Database Browser is a freeware, public domain, open source visual tool used to create, design and edit database files compatible with SQLite. It is meant to be used for users and developers that want to create databases, edit and search data using a familiar spreadsheet-like interface, without the need to learn complicated SQL commands. Controls and wizards are available for users to:

  • Create and compact database files
  • Create, define, modify and delete tables
  • Create, define and delete indexes
  • Browse, edit, add and delete records
  • Search records
  • Import and export records as text
  • Import and export tables from/to CSV files
  • Import and export databases from/to SQL dump files
  • Issue SQL queries and inspect the results
  • Examine a log of all SQL commands issued by the application

You can download the SQLite Database Browser Click here to download

JADE (Java Agent DEvelopment Framework)

JADE (Java Agent DEvelopment Framework) is a software Framework fully implemented in Java language. It simplifies the implementation of multi-agent systems through a middle-ware that complies with the FIPA specifications and through a set of graphical tools that supports the debugging and deployment phases. The agent platform can be distributed across machines (which not even need to share the same OS) and the configuration can be controlled via a remote GUI. The configuration can be even changed at run-time by moving agents from one machine to another one, as and when required. JADE is completely implemented in Java language and the minimal system requirement is the version 1.4 of JAVA (the run time environment or the JDK).

The synergy between the JADE platform and the LEAP libraries allows to obtain a FIPA-compliant agent platform with reduced footprint and compatibility with mobile Java environments down to J2ME-CLDC MIDP 1.0. The LEAP libraries have been developed with the collaboration of the LEAP project and can be downloaded as an add-on of JADE from this same Web site.

JADE is free software and is distributed by Telecom Italia, the copyright holder, in open source software under the terms of the LGPL ( Lesser General Public License Version 2). Since May 2003, a JADE Board has been created that supervisions the management of the JADE Project. Currently the JADE Board lists 5members: Telecom Italia, Motorola, Whitestein Technologies AG, Profactor GmbH, and France Telecom R&D.

The latest version of JADE is JADE 4.0.1 released on 07/07/2010

You must register first to download JADE here

Semantic Radar for Firefox

Semantic Radar is a semantic metadata detector for Mozilla Firefox.

Available at Mozilla Add-ons site. It is a browser extension which inspects web pages for links to Semantic Web metadata and informs about presence of it by showing an icon in browser’s status bar. Currently it supports RDF autodiscovery (SIOC, FOAF, DOAP and any type) and RDFa metadata detection.

New: Semantic Radar can now ping the Semantic Web Ping Service when metadata are detected. This allows for a community based discovery of the Semantic Web data.

Jena – A Semantic Web Framework for Java

Jena is a Java framework for building Semantic Web applications. It provides a programmatic environment for RDF, RDFS and OWL, SPARQL and includes a rule-based inference engine.

Jena is open source and grown out of work with the HP Labs Semantic Web Programme.

The Jena Framework includes:

  • Reading and writing RDF in RDF/XML, N3 and N-Triples
  • An OWL API
  • In-memory and persistent storage
  • SPARQL query engine

Support is provided by the jena-users mailing list.