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187 résultats
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résultats 1 à 12
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1. Describing resources  Droits d'accès : non autorisé
Description : 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 the Web. It enables anyone to describe resources, in particular Web resources, for instance indicat ...
Date : 08-09-2016
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1. Describing resources
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1. RDF Graph Pattern Matching  Droits d'accès : non autorisé
Description : 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 sources on the Web. It is part of a set of recommendations about th ...
Date : 08-09-2016
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1. RDF Graph Pattern Matching
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2. A Triple Model and a Graph Model  Droits d'accès : non autorisé
Description : This 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 Resource Description Framework. Resource means anything that can be ident ...
Date : 08-09-2016
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2. A Triple Model and a Graph Model
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2. Statements  Droits d'accès : non autorisé
Description : This video présents the SPARQL Statements. The first statement is the optional pattern. It enables to specify a part of a graph pattern that is not mandatory in the answer of the query. In the example below, t ...
Date : 08-09-2016
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2. Statements
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3. Serialization Syntaxes  Droits d'accès : non autorisé
Description : We saw in the previous sequence the principles of the RDF model by using an abstract syntax. This sequence will present you the various concrete syntaxes to serialize RDF graphs. RDF 1.1. comes with 7 syntaxes:  ...
Date : 08-09-2016
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3. Serialization Syntaxes
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3.Filter, Constraint and Function  Droits d'accès : non autorisé
Description : In the third part, we will see the filters, constraints and functions. It is possible to filter the results of query using an evaluable expression which defines constraints on variable values. So, ...
Date : 08-09-2016
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3.Filter, Constraint and Function
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4. Pre and Post Processing  Droits d'accès : non autorisé
Description : In the fourth part, we will see the pre and post processing of a SPARQL query. An RDF dataset is composed of a default graph and possibly several named graphs. The usual way of processing a query ...
Date : 08-09-2016
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4. Pre and Post Processing
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4. Values, Types and Languages  Droits d'accès : non autorisé
Description : This sequence is about the specificities of the RDF model related to typing literal values and resources in an RDF graph and indicating the language.
Date : 08-09-2016
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4. Values, Types and Languages
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5. Representing groups  Droits d'accès : non autorisé
Description : This sequence is about the specificities of the RDF model for representing groups. The type Bag is predefined in the RDF model to represent groups of resources or groups of literals without order.
Date : 08-09-2016
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5. Representing groups
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5. Several Query Forms  Droits d'accès : non autorisé
Description : In the fifth part, we will see several query forms. Until now, we have seen the select where SPARQL query form but there are three additional possible forms of query...
Date : 08-09-2016
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5. Several Query Forms
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6. Results and Update  Droits d'accès : non autorisé
Description : In the last part, we will see the result format and Update query. The format of SPARQL query results are also standardized by the Web consortium in such a way that every SPARQL endpoint returns resul ...
Date : 08-09-2016
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6. Results and Update
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6.Naming graphs  Droits d'accès : non autorisé
Description : 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 able to represent the particular subgraph, the context in which an ...
Date : 08-09-2016
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6.Naming graphs
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