Notice
5. Stack of Standards and Languages
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Descriptif
Let us now conclude this first part with an overview of the stack of standards and languages that are used to publish data on the Web.
These standards are recommendations from the W3C. In the stack you see here, we will first focus next week on RDF. RDF stands for Resource Description Framework. It is a data model and a set of syntaxes to write descriptions about the resources on the Web and exchange them. As we will see, it's a graph based model.
Intervention
Thème
Documentation
Documents pédagogiques
Summary of what is to come...
One difficulty, the first time you discover linked data on the Web, is that the initiative is presented under different names, each name insisting on a different facet of the overall architecture:
- The name “Web of data” insists on the opportunity now offered to us on the Web to open silos of data of all sizes, from the dataset of an address book up to immense genomic databases, and to exchange, to connect, to mix them on the Web according to our needs.
- The name "linked open data" focuses on the opportunity to exploit open data from the Web in our applications and the high added value there is in using and reusing URIs to join assertions from different sources. This name also reminds us that linked data are not necessarily open and that all the techniques we are introducing here can be used in private spaces (intranets, intrawebs, extranets, etc.)
- The name "giant global graph" puts into perspective the thousands of links between data distributed on the Web and which, joined through URIs, produce a giant graph.
- The name “semantic web” emphasizes the ability we now have to exchange our data schemas, in addition to datasets, and the associated semantics in order to enrich the range of automatic processing that can be performed on them.
But in fact, these names are just different facets of one global initiative.
Let us summarize in six points the ideas of a Web of linked data and a semantic Web:
https://www-sop.inria.fr/members/Fabien.Gandon/docs/semweb/
...and remember... “applications pass but data remain”
To go further...
At W3C:
- The “Web Data” activity at W3C
- Some of the tools implementing the standards of linked data and semantic Web for various programming languages and platforms. These are Wiki pages to be consulted and enriched.
Books:
- Semantic Web for the Working Ontologist: Effective Modeling in RDFS and OWL, Dean Allemang, James Hendler
- Tom Heath and Christian Bizer (2011) Linked Data: Evolving the Web into a Global Data Space (1st edition). Synthesis Lectures on the Semantic Web: Theory and Technology, 1:1, 1-136. Morgan & Claypool.
Video: "Semantic Web & the Web of Data: when the link makes sense"
Decks of slides:
- "Semantic Web Good News" by Frank Van Harmelen (2010)
- "Evolving the Web into a Global Dataspace – Advances and Applications" by Chris Bizer Chris Bizer
- "Introduction to Linked Data",
Presentation given at the "How to Consume Linked Data on the Web"
Tutorial at 2009 International Semantic Web Conference by Juan Sequeda,
- "An introduction to Semantic Web and Linked Data" by Fabien Gandon
- And some other decks of slides
Dans la même collection
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3. From pages to resources
GANDON Fabien
FARON Catherine
CORBY Olivier
In this third part, we will see another evolution of the Web, or more precisely, an evolution of the way we use the Web. We will
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Demos about a Web of Linked data
GANDON Fabien
FARON Catherine
CORBY Olivier
The BBC Web site uses linked (open) data The Wildlife documentary catalog on the Web site of BBC The Web site of BBC is structured and augmented with both internal and public linked data. In
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2. Separating Presentation and Content
GANDON Fabien
FARON Catherine
CORBY Olivier
We 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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4. Linked Data Principles
GANDON Fabien
FARON Catherine
CORBY Olivier
In this fourth part, we're going to see the principles behind Linked Data. What we're going to do is to change slightly how we
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1. Historical Introduction to the Web Architecture
GANDON Fabien
FARON Catherine
CORBY Olivier
Going back in history, back in 1945, Vannevar Bush wrote an article entitled "As we may think". In this article, he
Avec les mêmes intervenants et intervenantes
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Demos about The RDF Data Model
GANDON Fabien
FARON Catherine
CORBY Olivier
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
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1. Historical Introduction to the Web Architecture
GANDON Fabien
FARON Catherine
CORBY Olivier
Going back in history, back in 1945, Vannevar Bush wrote an article entitled "As we may think". In this article, he
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6.Naming graphs
GANDON Fabien
FARON Catherine
CORBY Olivier
This 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
GANDON Fabien
FARON Catherine
CORBY Olivier
The 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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Demos about a Web of Linked data
GANDON Fabien
FARON Catherine
CORBY Olivier
The BBC Web site uses linked (open) data The Wildlife documentary catalog on the Web site of BBC The Web site of BBC is structured and augmented with both internal and public linked data. In
-
1. Describing resources
GANDON Fabien
FARON Catherine
CORBY Olivier
In 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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3.Filter, Constraint and Function
GANDON Fabien
FARON Catherine
CORBY Olivier
In the third part, we will see the filters, constraints and functions. It is possible to filter the results of query using
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5. R2RML: integration with databases
GANDON Fabien
FARON Catherine
CORBY Olivier
R2RML 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
GANDON Fabien
FARON Catherine
CORBY Olivier
This 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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Demos about SPARQL
GANDON Fabien
FARON Catherine
CORBY Olivier
Flint, 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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Conclusion of the MOOC Introduction to a Web of Linked Data
GANDON Fabien
FARON Catherine
CORBY Olivier
This video gives a summary of all the notions that have been presented in the 4 parts of the MOOC Introduction to a Web of Linked Data. We saw that we can use HTTP URIs to
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1. RDF Graph Pattern Matching
GANDON Fabien
FARON Catherine
CORBY Olivier
This 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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