Tag Cloud

01Dec08

I discovered this web site today : http://www.wordle.net/
It proposes some nices layouts to display tag clouds.
The display is made with a java applet, but I’m sure we could do pretty the same thing using SVG.  I used SVG in one of my previous projects 2 or 3 years ago and I really like how simple [...]

Filed under: Semantic Web   |  1 Comment
Tags: rendering algorithm, SVG, tag cloud

Semantic food for free

04Mar08

Last year, Reuters acquired text analytics company ClearForest.
They recently launched a new free semantic web service, based on ClearForest technology, named OpenCalais. This service helps to extract from a submitted text (web content for example), entities. And, last but not least, the service returns all these extracted concepts as an RDF graph. So using this [...]

Filed under: Semantic Web   |  3 Comments
Tags: OpenCalais RDF SemanticWeb service SPARQL

RDF Graph visualization tools

30Sep07

RDF-Gravity
RDF Gravity is a tool for visualising RDF/OWL Graphs/ ontologies.
(tags: SemanticWeb graph rdf visualization tool)

SIMILE | Welkin
Welkin is a graph-based RDF visualizer developed by the Simile project
(tags: visualization graph rdf SemanticWeb tool)

IsaViz Overview
IsaViz is a visual environment for browsing and authoring RDF models represented as graphs
(tags: SemanticWeb visualization tool rdf graph)

XML.com: Styling RDF Graphs with [...]

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Tags: rdf graph visualization tools semanticweb

RDF data

30Sep07

What are the possible RDF data sources?

triple stores : locals and distant, the last ones can be queried using the SPARQL protocol
local rdf datasets or data available in RDF : loaded in memory
intermediate layer doing the mapping between the native/legacy data representation (DB or LDAP for example) and an exposed RDF view.=> D2RQ/D2R , [...]

Filed under: Semantic Web   |  2 Comments
Tags: SemanticWeb RDF

The RDF book mashup

02Sep07

The RDF book mashup makes information about books, their authors, reviews, and online bookstores available on the Semantic Web. This information can be used by RDF tools and you can link to it from your own Semantic Web data.
The data are retrieved from Amazon or Google Base. You can find more informations here [...]

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Tags: SemanticWeb RDF mashup