The integration of a part of Wikidata into DBpedia Fr is one of the particularities of the last French release. We are hosting data related to the extraction process made by the DBpedia association
As you understood in the article dedicated to the structure of DBpedia Fr, these data are available in the following graphs :
Remind that the properties of these graph were aligned during the exctraction process (as described here) with the DBpedia ontology properties. This translation is based on the values defined as owl:equivalentProperty in DBpedia wiki (see the example of BNFid here), but also on that mapping file.
To allow access to Wikidata on the same line as the rest of the DBpedia knowledge, we perform several transformations on them. We illustrate this through the example of the DBpedia Paris resource.
The graphe <http://fr.dbpedia.org/graph/dbpedia_wikidata_sameas-all-wikis> is listing all the correspondences bteween the Wikidata resource with the DBpedia resources in every chapter, under the shape :
The last step allows us to quickly find the triples we need to translate in all the other named graphs related to Wikidata. So we update all Wikidata subjects with their corresponding DBpedia Fr resource if have one. Let's focus on the graph <http://fr.dbpedia.org/graph/dbpedia_wikidata_mappingbased-objects-uncleaned> :
Then, we apply that translation in the objects side, by browsing all the Wikidata named graph.
The named graph <http://fr.dbpedia.org/graph/dbpedia_wikidata_sameas-all-wikis> do not contains only the list of the link between Wikidata > DBpedia FR, but also all the links related to other linguistic chapter of DBpedia.
For being able to access them via the DBpedia resource we needed to transform the triple shaped as :
We finaly inversed all the relation sameAs linking a Wikidata resources to another DBpedia Fr one in the graph <http://fr.dbpedia.org/graph/dbpedia_wikidata_sameas-all-wikis> :
For understanding better what appends to our Paris resource, you can check the flag of this one with a SPARQL request :
Concerning the inversion of the relations Wikidata > DBpedia Fr, but also the linkage of the other interlingual resources, you can check it with :
Finally you can also check the update of the objects / subjects in the named graphs related to Wikidata (<http://fr.dbpedia.org/graph/dbpedia_wikidata_mappingbased-objects-uncleaned>), let's query the graph. You also free to check it on every graphs given in the list presented in the begining of this article.
Concretly the transformation process allows you to access to a huge number of informations without using federated query through a unified semantic representation.
As a comparison you can retrieve the total number of resources that DBpedia Fr references, as follows :
By looking at the given results you will easily understand the interest of a french linguistic version of DBpedia. Indeed, a lot of entities are not included in Wikidata.
In another hand, you can compute the number of Wikidata entities not referenced into DBpedia Fr (you may have to increase the Execution timeout parameter into the query editor of Virtuoso)
The operation offers a large description of DBpedia resources relative to an infobox template not already mapped, or simply incomplete. The Wikidata integration could create duplicates and could create discrepancies but the named graph lets you choose the data source you prefer to enhance. The use of the clause GRAPH as follows returns the origins of a fact :