In this post, we will see how to resolve SPARQL query returns empty table Question: Hello I am new to SPARQL and I am trying to retrieve the values of the dbo:wikiPageWikiLink Property from the followin page: link Below is ...

In this post, we will see how to resolve Get value of property linked to another property in SPARQL querying DBpedia Question: I am trying to complete the following case in SPARQL. I want to return the labels of the ...

Question: I would like to query for every individual in my ontology with a label, which contains a specific string (“PK1”). Then I would like to see every property an value that those individuals have. I tried this code: However ...

Question: I am in a learning phase of SPARQL so excuse if the question sounds basic. I am exploring SPARQLWrapper to connect to a SPARQL endpoint to fetch some data. Below is the query. The query above work fine. Is ...

Question: Using RDF-star, say I have: and ?couple takes values such as this one: Is there any way to extract :Bill and :Mary from the triples variable ?couple, and bind them to variables ?husband and ?wife? I know I could ...

Question: I have created an RDF dataset in protege having dates of type “datetime” (I have not found option of creating simple dates) I have the following query: And I am getting the following error: Is there a way to ...

Question: I use Wikidata as example. The following works (test it): Now, suppose I have several items, e.g. wd:Q1339, wd:Q76428 and wd:Q57487. I want to construct a similar query but applied to exactly those items. If there was a magical ...

Question: I am using Triple Store called Apache Jena Fuseki for storing the RDF as input But the thing is that i have data in CSV format. I researched a lot but didn’t find direct way to convert CSV to ...

Question: I have following concepts in turtle file. I would like to extract preferred label and ids for parent node (DOID_4159) and all its child from below concepts. I have written following SPARQL query to fetch the information, but it ...

Question: I am trying to construct a query to return a list of actors and their spouses while including marriage and divorce dates for each couple. So I would expect to see each actor duplicate with each instance of a ...