Using Fuseki to host IRIs / Using Fuseki as an LDP

2022-01-04 Thread Jakub Jałowiec
Hi, Let's say I am hosting Apache Jena Fuseki at http//somewebsite.com and that I have a persistent dataset at http// somewebsite.com/some_persistent_dataset . The persistent dataset contains a bunch of RDF triples like this one: "http// somewebsite.com/some_persistent_dataset/person_1 http://xm

How to cite Jena?

2021-12-11 Thread Jakub Jałowiec
Hi, is there any preferred way to cite Apache Jena in a publication, preferably in BibTeX? Best regards, Jakub

Re: Re: OWL inferences in Apache Jena (for e.g. owl:allValuesFrom)

2021-12-07 Thread Jakub Jałowiec
t; > in the Jena OWL reasoner are complementOf and oneOf. > > the lack of support for "oneOf" class expression (the {cat_1} is such a > thing) which in fact means the inference is not supported by Jena > built-in reasoners. > > You can try with Jena 3.X + Openllet. Or

OWL inferences in Apache Jena (for e.g. owl:allValuesFrom)

2021-12-05 Thread Jakub Jałowiec
Hi, I have an OWL ontology https://github.com/kubajal/covidepid/blob/main/minimal_test.ttl. The ontology has the following definitions: > >- Person > - CatPerson (subClassOf Person + CatPerson equivalentTo hasPet only > Cat) >- Animal > - Cat (subClassOf Animal) >- ha

Re: Apache Jena rules to find the minimum in a list of data property values

2021-12-05 Thread Jakub Jałowiec
house ?person ?lowestAge { >?person foaf:age ?lowestAge . >?person covidepid:livesIn ?house . > > > {SELECT ?house (min(?age) as ?lowestAge) > WHERE { >?person foaf:age ?age . >?person covidepid:livesIn ?house . > } > GROUP BY ?house} > } > > > > On

Apache Jena rules to find the minimum in a list of data property values

2021-12-02 Thread Jakub Jałowiec
Hi, I would appreciate any help with the following problem. I have a bunch of (foaf:Persons, myOntology:livesIn, myOntology:Place) triples. I am trying to find the youngest person in each myOntology:Place (i.e. the person with the earliest value of foaf:age for each myOntology:Place). What I've tri

Re: Parallel SELECT queries in Fuseki or Jena's CLI

2021-11-21 Thread Jakub Jałowiec
t; requests concurrently - the Fuseki case. > > At the moment: > > I'm sure that path evaluation could be improved. > > A good first step is to check that there aren't any basic, silly errors > in the existing code (it wouldn't be the first time). If none,

Re: Parallel SELECT queries in Fuseki or Jena's CLI

2021-11-05 Thread Jakub Jałowiec
I've noticed that the figure from my last message has not been sent properly, here is a link to it: https://kubajal.github.io/covidepid/ Best regards, Jakub pt., 5 lis 2021 o 13:00 Jakub Jałowiec napisał(a): > Hi Andy, > thank for your input. > Let me drill it down a li

Re: Parallel SELECT queries in Fuseki or Jena's CLI

2021-11-05 Thread Jakub Jałowiec
l > queries as it needs and end the transaction. > > In fact, only TDB2 enforces this; TDB1 only enforces it if it has > already been used transactionally. Other datasets are multiple-reader > safe anyway. But placing inside a transaction is the correct way. > > Andy > >

Parallel SELECT queries in Fuseki or Jena's CLI

2021-10-30 Thread Jakub Jałowiec
Dear community, is there any high-level user interface to execute parallel SELECT queries in Apache Fuseki or the CLI of Apache Jena? I've found a short note on parallelism in Apache Jena here: https://jena.apache.org/documentation/notes/concurrency-howto.html. But that is not really what I am l