Hi Arne, thanks so much, I checked I had created the dataset into the default graph.
As soon as I created the named graph, as you recommended I got the expected results. Best regards Luis El mié, 8 may 2024 a las 23:30, Arne Bernhardt (<arne.bernha...@gmail.com>) escribió: > Hi Louis, > > You might have uploaded the MeSH ontology into the default graph or at > least not into a graph with the name `<http://id.nlm.nih.gov/mesh>`. > > From the query editor at https://id.nlm.nih.gov/mesh/query, I see that > they > have different graphs for each year (current = `< > http://id.nlm.nih.gov/mesh>`, > 2024 = `<http://id.nlm.nih.gov/mesh/2024>`, and 2023 = `< > http://id.nlm.nih.gov/mesh/2023>`). To use the sample queries, you need to > upload the data into the dataset using the corresponding names. > > Fixing the query is not an option if different years have all been uploaded > into the same default graph. A glimpse into the data told me that all > subjects begin with `http://id.nlm.nih.gov/mesh/` > <http://id.nlm.nih.gov/mesh/>. So, you could filter for > a specific year like this: `FILTER(STRSTARTS(STR(?subject), " > http://id.nlm.nih.gov/mesh/2024";))`. Unfortunately, this does not work for > the current year, as in your example, since > `FILTER(STRSTARTS(STR(?subject), "http://id.nlm.nih.gov/mesh/";))` would > include all subsequent years. > > To check your assumption about the default graph and where your data is: In > the Fuseki UI, there is the "info" tab for your dataset, where you may > click "count triples in all graphs," which gives you a list of all graphs > in your dataset, their names, and the corresponding triple count. The > following query should provide the same information: > > ``` > SELECT ?graph_name (COUNT(?s) AS ?triples) > WHERE { > { > BIND('default graph' AS ?graph_name) > OPTIONAL { ?s ?p ?o. } > } > UNION > { > GRAPH ?graph_name { OPTIONAL { ?s ?p ?o. } } > } > } > GROUP BY ?graph_name > ``` > > See also > > https://jena.apache.org/tutorials/sparql_datasets.html#describing-rdf-datasets---from-and-from-named > . > > I hope this helps. > > Arne > > Am Mi., 8. Mai 2024 um 19:23 Uhr schrieb Luis Enrique Ramos García > <luisenriqueramos1...@googlemail.com.invalid>: > > > I uploaded the mesh ontology in fuseki, > > but when I try with the query the sample queries recommended in their > > documentation: > > https://hhs.github.io/meshrdf/sample-queries > > > > I get no results. > > > > For instance: > > PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> > > PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> > > PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> > > PREFIX owl: <http://www.w3.org/2002/07/owl#> > > PREFIX meshv: <http://id.nlm.nih.gov/mesh/vocab#> > > PREFIX mesh: <http://id.nlm.nih.gov/mesh/> > > PREFIX mesh2015: <http://id.nlm.nih.gov/mesh/2015/> > > PREFIX mesh2016: <http://id.nlm.nih.gov/mesh/2016/> > > PREFIX mesh2017: <http://id.nlm.nih.gov/mesh/2017/> > > SELECT DISTINCT ?p > > FROM <http://id.nlm.nih.gov/mesh> > > WHERE { > > ?s ?p ?o > > } > > ORDER BY ?p > > > > It gives me no results, but when I comment out the line with the FROM > > clause, I get some results. > > > > I assume the data with namespace meshv is in the default graph, and the > > other data is in a specific named graph, but I am not sure how I have to > > write the query to get the data in the named graphs. > > > > Thanks in advanced > > > > > > Luis Ramos > > >
