Vidéo pédagogique
Notice
Langue :
Anglais
Crédits
Fabien Gandon (Intervention), Catherine Faron (Intervention), Olivier Corby (Intervention)
Conditions d'utilisation
Unless otherwise specified, the course material is provided under the Creative Commons License BY-NC-ND: the name of the author should always be mentioned; the user can exploit the work except in a commercial context; and he or she cannot make changes to the original work.
DOI : 10.60527/1e42-vm02
Citer cette ressource :
Fabien Gandon, Catherine Faron, Olivier Corby. Inria. (2016, 8 septembre). 2. Statements , in 3. SPARQL Query Language. [Vidéo]. Canal-U. https://doi.org/10.60527/1e42-vm02. (Consultée le 28 mars 2024)

2. Statements

Réalisation : 8 septembre 2016 - Mise en ligne : 13 novembre 2018
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Descriptif

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, there is a mandatory part which is the person variable with the homepage Fabien, then there's an optional part of the query, where we would like to have the name of the resource person, but if we find no name in the target graph, the query will not fail, we will still have a result. So among the result of this query, we may have values, or not for the name variable and so in some results, the name variable may be unbound, that means that this variable may have no value in the results.

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Intervention
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