Do I need to get the entire default graph each time I need prefixes? Isn't this low-performant when dealing with big default graphs?
2016-03-06 17:41 GMT+01:00 Andy Seaborne <a...@apache.org>: > The prefixes for serialization are taken from the default graph. > > You can load the default graph just with prefixes, and no triples, to > control the output from a named graph. > > Andy > > > On 05/03/16 11:57, Valerio Belcastro wrote: > >> Hi guys, >> >> I launched Fuseki 2.3.1 as a standalone server on my local machine from >> command line like this: >> >> path-to-fuseki-folder>fuseki-server --update --mem /myData >> >> Then I uploaded some data into the dataset default graph using this code >> snippet: >> >> String personURI = "http://somewhere/JohnSmith";; >> String malcolmURI = "http://somewhere/MalcolmGraves";; >> String givenName = "John"; >> String familyName = "Smith"; >> String fullName = givenName + " " + familyName; >> String fullName2 = "Malcolm Graves"; >> String email = givenName+familyName+"@gmail.com"; >> // create an empty Model >> Model model = ModelFactory.createDefaultModel(); >> // create the resource // and add the properties cascading style >> Resource johnSmith >> = model.createResource(personURI) >> .addProperty(VCARD.FN, fullName) >> .addProperty(VCARD.N, >> model.createResource() >> .addProperty(VCARD.Given, givenName) >> .addProperty(VCARD.Family, familyName)); >> >> model.setNsPrefix("vcard", VCARD.getURI()); >> DatasetAccessor dsa = DatasetAccessorFactory.createHTTP("http:/ >> /localhost:3030/myData/data"); >> >> dsa.add(model); >> >> >> After that, I retrieved the default graph and printed his prefix map: >> >> Iterator<Map.Entry<String, String>> nsIt = dsga.getModel().getN >> sPrefixMap().entrySet().iterator(); >> nsIt.forEachRemaining(ns -> { >> System.out.println(ns); }); >> >> >> The output I obtained is the following: >> >> vcard=http://www.w3.org/2001/vcard-rdf/3.0# >> >> rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns# >> >> >> If I do the same thing loading the model into a named graph instead of >> the defaultgraph nothing is printed on console, it is like the prefix >> map is empty. >> >> Do I need to configure something to make things work? >> >> Thank you in advance >> >> >
