Notice
Demos about The RDF Data Model
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- niveau 1 niveau 2 niveau 3
Descriptif
Validating and translating RDF data
The W3C RDF validation service checks the validity of RDF statements in the RDF/XML syntax and, in the case where these statements are valid, it displays the list of the parsed triples and the graph composed by these triples.
http://www.w3.org/RDF/Validator/
RDF Translator checks the validity of RDF statements in any of the RDF syntaxes and, in the case where these statements are valid, it translates them into any other chosen RDF syntax.
http://rdf-translator.appspot.com/
+ 1 more demo :
Visual RDF : visualization of RDF graphs
Visual RDF is a Web service and a Javascript library enabling to visualize and manipulate RDF data in the form of graphs.
Intervention
Thème
Documentation
Documents pédagogiques
Back on DBpedia
Now that you are familiar with RDF, let us go back on the Web of Data to observe it in the wild, and let us start with DBpedia:
- Here is the DBpedia page for Sophia Antipolis area: http://fr.dbpedia.org/page/Sophia_antipolis
- This page describes the resource identified by the URI http://fr.dbpedia.org/resource/Sophia_antipolis
- At the bottom of the page, several links enable to access data, in particular RDF data (in N-Triples N3/Turtle JSON XML formats)
- The link towards the data in RDF/XML format is a redirection to the file http://fr.dbpedia.org/data/Sophia_antipolis.rdf that you can view or download to study its content.
- You can also give it to Visual RDF to visualize its content as a graph. For instance: http://graves.cl/visualRDF/?url=http://fr.dbpedia.org/data/Sophia_antipolis.rdf
Back on the BBC Site
Last week, we used a trick from the BBC which consisted in adding the extension ".rdf" to the URI of some HTML pages to access the corresponding RDF data.
For instance, for the Great White Shark:
- Its description in HTML is here: http://www.bbc.co.uk/nature/life/Great_white_shark
- And its RDF description is there: http://www.bbc.co.uk/nature/life/Great_white_shark.rdf
When browsing the RDF description of the Great White Shark from the BBC, you will find a link to its description on DBpedia:
http://dbpedia.org/resource/Great_white_shark"/>
This excerpt of RDF data shows that the BBC applies the principles of
the Web of Data up to the highest level (five stars) by linking
its data to other sources from the Web of Data and, by doing so, enables
to discover, browse and integrate these other RDF data sources.
And Many Other Data Sources...
There are many other data sources on the Web. For instance, you can consult Victor Hugo's description…
… in HTML at the BNF http://data.bnf.fr/11907966/victor_hugo/
… in RDF at the BNF http://data.bnf.fr/11907966/victor_hugo/rdf.xml
… in HTML at the Library of Congress http://id.loc.gov/authorities/names/n79091479.html
… in RDF at the Library of Congress http://id.loc.gov/authorities/names/n79091479.rdf
But you can consult data on protein "Leukocyte surface antigen CD53" in the mouse as well …
… in HTML http://www.uniprot.org/uniprot/Q61451
… in RDF http://www.uniprot.org/uniprot/Q61451.rdf
etc.
Liens
visualization of RDF graphs Visual RDF is a Web service and a Javascript library enabling to visualize and manipulate RDF data in the form of graphs. http://graves.cl/visualRDF/?url=http://graves.cl/visualRDF/
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3. Serialization Syntaxes
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5. Representing groups
GandonFabienFaronCatherineCorbyOlivierThis sequence is about the specificities of the RDF model for representing groups. The type Bag is predefined in the RDF model to represent
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2. A Triple Model and a Graph Model
GandonFabienFaronCatherineCorbyOlivierThis sequence will introduce the principles of the RDF model. We will see that it is a triple model and a graph model. RDF stands for
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7. RDF Schema
GandonFabienFaronCatherineCorbyOlivierThis sequence will introduce you to the RDF Schema, the standard to represent vocabularies to be used in RDF descriptions. In the
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4. Values, Types and Languages
GandonFabienFaronCatherineCorbyOlivierThis sequence is about the specificities of the RDF model related to typing literal values and resources in an RDF graph and indicating the
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1. Describing resources
GandonFabienFaronCatherineCorbyOlivierIn this second part we will focus on RDF. RDF is the first brick of the Semantic Web Standards Stack and comprises both a model and several serialization syntaxes, to publish data about anything on
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6.Naming graphs
GandonFabienFaronCatherineCorbyOlivierThis sequence explain how to name graphs in the RDF model and what is the utility of it. In many applications it is very useful to be
Avec les mêmes intervenants et intervenantes
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3. Serialization Syntaxes
GandonFabienFaronCatherineCorbyOlivierWe saw in the previous sequence the principles of the RDF model by using an abstract syntax. This sequence will present you the
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6. Results and Update
GandonFabienFaronCatherineCorbyOlivierIn the last part, we will see the result format and Update query. The format of SPARQL query results are also standardized by the
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Demos about Integration with Other Data Formats and Sources
GandonFabienFaronCatherineCorbyOlivierAugmenting Web browser with data in the pages This demonstration show an extension to the browser called Operator. This extension allows the browser to actually look at the data inside the page
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1. RDF Graph Pattern Matching
GandonFabienFaronCatherineCorbyOlivierThis third part presents the SPARQL (pronounced sparkle) Query Language that enables users to query RDF triple stores. The SPARQL query language enables us to access data
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2. Separating Presentation and Content
GandonFabienFaronCatherineCorbyOlivierWe now consider one of the first evolutions of the web, to separate the presentation and the content. In 1996, CSS, standing for
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6.Naming graphs
GandonFabienFaronCatherineCorbyOlivierThis sequence explain how to name graphs in the RDF model and what is the utility of it. In many applications it is very useful to be
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1. RDFa: an RDF syntax inside HTML
GandonFabienFaronCatherineCorbyOlivierThe idea of the integration of the web of linked data with other data formats and sources is determined by the fact that the Web is evolving towards all forms of
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1. Describing resources
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GandonFabienFaronCatherineCorbyOlivierR2RML allows us to integrate data from databases into RDF. There are two ways of transforming a relational database into RDF using R2RML.
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4. Values, Types and Languages
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Demos about SPARQL
GandonFabienFaronCatherineCorbyOlivierFlint, a SPARQL Query Editor Editors are now available for SPARQL. We present the Flint structured editor which provides syntactic coloration. The editor proposes SPARQL keywords according to the
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