Online Ontology Visualisation: RDFa

octubre 5, 2010

jOWL status updateI packaged the latest development version of jOWL into a 0.5 release, available at Google Code. jOWL is an AJAX/javascript extension to jQuery that I am developing. The jOWL library parses and reasons with OWL-DL documents. Supported browsers for this release are Internet Explorer 7 and Firefox 2 & 3.This release is accompanied by several new and impressive demos in my humble opinion. These make use of the new functionalities that have been incorporated so far. Below are some important highlights.

vía Online Ontology Visualisation: RDFa.

Planning a Semantic Web site

junio 30, 2009

Rob Crowther (, Web developer, Freelance

Summary: The Semantic Web brings with it the opportunities for users to get smarter search results, and for site owners to get more targeted traffic as users find what they really want. But these benefits don’t just magically appear. This article leads you through the aspects of both information architecture and general infrastructure you need in place to truly take advantage of this burgeoning opportunity.

This article discusses what you need to know to make your Web site part of the Semantic Web. It starts with a discussion of the problems the Semantic Web tries to solve and then moves to the technologies involved, such as Resource Description Framework (RDF), Web Ontology Language (OWL), and SPARQL Protocol and RDF Query Language (SPARQL). You’ll see how the Semantic Web is layered on top of the existing Web. It then covers some issues that you want to know about when you plan a new Web site and also gives specific examples of how to use technologies like RDFa and Microformats to enable your existing Web site to become a part of the Semantic Web.


mayo 19, 2009

RDF Gravity is a tool for visualising RDF/OWL Graphs/ ontologies.

Its main features are:

* Graph Visualization

* Global and Local Filters (enabling specific views on a graph)

* Full text Search

* Generating views from RDQL Queries

* Visualising multiple RDF files

RDF Gravity is implemented by using the JUNG Graph API and Jena semantic web toolkit.


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Aperture Framework

mayo 15, 2009

Java (programming language)
Image via Wikipedia


a Java framework for getting data and metadata

Project name

From Merriam-Webster Online:

Main Entry: ap·er·ture (sounds like this)

Pronunciation: ‘ap-&(r)-“chur, -ch&r, -“tyur, -“tur

Function: noun

Etymology: Middle English, from Latin apertura, from apertus, past participle of aperire to open

1. an opening or open space : HOLE

2. a : the opening in a photographic lens that admits the light

b : the diameter of the stop in an optical system that determines the diameter of the bundle of rays traversing the instrument

c : the diameter of the objective lens or mirror of a telescope

Sourceforge project

desdeAperture Framework.

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Semantic Web Use Cases and Case Studies: Twine

abril 6, 2009

Image representing Twine as depicted in CrunchBase
Image via CrunchBase

Jim Wissner Twine and Nova Spivack, Twine, USA

April 2009


Twine helps people track, discover, and share content around topics they are interested in.

Twine is built on a semantic applications platform that combines W3C standards for RDF and OWL with natural-language processing, statistical analysis and graph analysis capabilities.

Twine is developed by Radar Networks, headquartered in San Francisco. Before developing Twine, Radar Networks had worked on the CALO Cognitive agent That Learns and Organizes project, a distributed research program focused on next-generation semantically-aware machine learning applications. The Twine product was initially shown in late 2007 and early 2008 and became publicly available in October 2008.

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TONES Ontology Repository

abril 2, 2009

Ontology Repository


Displaying 230 of 230 ontologies Filter


EL++ 10 Protege RDF/XML Browse
EL++ 0 Protege-dc RDF/XML Browse
ALCH(D) 1625 Economy RDF/XML Browse

desde TONES Ontology Repository.

Google Visualization API Gallery – Google Visualization API – Google Code

abril 1, 2009

Google Visualization API Gallery

This gallery lists JavaScript visualizations built on the Google Visualization API. Some of these have been written by Google, and some have been written by third parties. Links below point to instructions for and demonstrations of each visualization. (Links to third-party visualizations will take you off the Google site.) To learn how to use JavaScript visualizations, read Using Visualizations.

To see a list of visualization gadgets, see the Google Visualization API Gadget Gallery.

If you have developed your own visualization, we encourage you to submit it to this gallery.

Google Visualization API Gallery – Google Visualization API – Google Code.

Google Web Toolkit – Google Code

abril 1, 2009

Creación de aplicaciones AJAX más rápida que la manual
Actualmente, la creación de aplicaciones web resulta un proceso pesado y propenso a errores. Los desarrolladores pueden pasar el 90% de su tiempo estudiando las peculiaridades de los navegadores. Por otra parte, la creación, la reutilización y el mantenimiento de una gran cantidad de componentes AJAX y bases de código JavaScript pueden ser tareas complejas y delicadas. Google Web Toolkit (GWT) facilita estas arduas tareas al ofrecer a los desarrolladores la posibilidad de crear y mantener rápidamente aplicaciones JavaScript con interfaces complejas, pero de gran rendimiento, en el lenguaje de programación Java.

Google Web Toolkit – Google Code.

YouTube – Google I/O 2008 – Visualize your Data: Visualization API

abril 1, 2009

YouTube – Google I/O 2008 – Visualize your Data: Visualization API.

YouTube – glTrail – Force Feedback

abril 1, 2009

YouTube – glTrail – Force Feedback.