Re: Question about Jena capabilities/requirements
Hi Pawel, What would be other requirements for such a system, you mentioned memory scaling and response time? I ask this question because Fuseki might meet some of these requirements but not others, or vice versa, for any database. Knowing exactly what your requirements are will help you determine if Fuseki can be used. From: Goławski, Paweł Sent: 07 March 2022 16:58 To: users@jena.apache.org Subject: Question about Jena capabilities/requirements Dear Jena users, I’m doing research of possible RDF storages to be used in healthcare system. And I’m especially interested in Jena Fuseki with TBD/TBD2. I wonder if there is some info about production ready case studies (from healthcare sector especially, but any others also)? Can someone provide any sort of hardware requirements/ recommendations so that we can calculate e.g. how many cores we need to make the system performant wrt the expected size? For now I can only estimate the number of triples. I would say we are heading towards two settings: * 50M triples yearly growth * 600M triples yearly growth Any feedback is welcome Thanks in advance. Paweł
RE: Trasforming and quering RDFs
Hey, Regarding your problem "I can't find X in the RDF file". In your example, the RDF file is in XML format, which may not be ideal for user reading. Why don't you try to present the RDF in more readable formats such as N3 or Turtle? Rinor Sefa -Original Message- From: Martynas Jusevičius Sent: Tuesday, 18 January 2022 17:38 To: jena-users-ml Subject: Re: Trasforming and quering RDFs Hi, SPARQL is an RDF query language, so no. But there are tools that can help: https://github.com/AtomGraph/JSON2RDF https://sparql-anything.cc Martynas atomgraph.com On Tue, Jan 18, 2022 at 5:32 PM emri mbiemri wrote: > > Dears, > > In order to have a more scalable knowledge base and easy to query, I > have converted JSON files [1] to RDFgraphs [2]. I am trying to get all > "Datatype" from "ViewModel" which has a "Type":1. The issue is I > cannot find the Type: 1 within the RDF file and if so, I don't know > how to query the "Datatype" which has "Type":1 within the "ViewModel" tag? > > And secondly, is there a direct way to query the JSON files easier > using SPARQL without having to convert them into RDF? > > Hope for your help. > > > [1] > https://github.com/iliriani/iliriangit/blob/master/CustomerForm.json > [2] > https://github.com/iliriani/iliriangit/blob/master/CustomerForm.rdf
RE: Use command tdbquery
I think if you describe your use case in more detail, it would be easier to get help. For example, can you clarify - a query? What kind of query - "many results", any number? - What do you consider slow and inefficient and what are would you consider ideal? Also, why do you think that the HTTP call is the bottleneck? I think that this is a wrong assumption. Try to run a simple query and you will see that the HTTP call is not the bottleneck. -Original Message- From: robert.ba...@tiscali.it Sent: Monday, 3 January 2022 12:59 To: users@jena.apache.org Subject: Use command tdbquery Hi, i am using a fuseki server and need to run a query which returns a lot of results. The use of the HTTP call (http: // localhost: 3030 / ds / query = myQuery) is very slow and inefficient. I thought about using the tdbquery command. But I don't want to stop fuseki. Is there any way to do this? Con Tiscali Mobile Smart 70 hai 70 GB in 4G, minuti illimitati e 100 SMS a soli 7,99€ al mese http://tisca.li/Smart70
RE: Javadoc links are broken?
I think I found the issue, https://bugs.openjdk.java.net/browse/JDK-8215291 -Original Message- From: Andy Seaborne Sent: Monday, 27 December 2021 13:45 To: users@jena.apache.org Subject: Re: Javadoc links are broken? On 27/12/2021 12:02, Rinor Sefa wrote: > I also find some issues navigating documentation through search bar. > > Steps to reproduce > 1) Go to https://jena.apache.org/documentation/javadoc/jena/index.html > 2) Use Search Bar on top right. > 3) Write ModelFactory(type)(example) > 4) Click > 5) NOT FOUND page displayed > (https://jena.apache.org/documentation/javadoc/jena/undefined/org/apac > he/jena/rdf/model/ModelFactory.html) Thanks. Does anyone know what causes the /undefined/? Is that where a module name goes? Jena isn't java modules - a it does set automatic modules in the POMs. Is this new at 4.3? (because AFAICS we didn't change any thing from 4.2). 4.x was the start of using java11 where the javadoc tools is quite different to the java8 one. Andy > > Happy holidays, > Rinor Sefa > > -Original Message- > From: Andy Seaborne > Sent: Sunday, 26 December 2021 12:59 > To: users@jena.apache.org > Subject: Re: Javadoc links are broken? > > > > On 25/12/2021 11:35, Martynas Jusevičius wrote: >> Hi, >> >> Happy holidays! >> >> Is it just me or most Javadoc links are broken? Or is it a Google >> indexing problem? > > The Apache Jena project is not responsible for Google indexing :-) > >> For example: >> https://jena.apache.org/documentation/javadoc/rdfconnection/org/apach >> e /jena/rdfconnection/RDFDatasetConnection.html > > Java11 javadoc is quite different to java8 javadoc. > The material is there if you navigate to it. > > https://jena.apache.org/documentation/javadoc/rdfconnection/org.apache > .jena.rdfconnection/org/apache/jena/rdfconnection/RDFDatasetConnection > .html > >> https://jena.apache.org/documentation/javadoc/arq/org/apache/jena/que >> r >> y/DatasetAccessor.html > > Not in the codebase. > >> Those are the links I get searching Google for "RDFDatasetConnection" >> and "DatasetAccessor" and both return "Not Found". >> >> Martynas >>
RE: Javadoc links are broken?
I also find some issues navigating documentation through search bar. Steps to reproduce 1) Go to https://jena.apache.org/documentation/javadoc/jena/index.html 2) Use Search Bar on top right. 3) Write ModelFactory(type)(example) 4) Click 5) NOT FOUND page displayed (https://jena.apache.org/documentation/javadoc/jena/undefined/org/apache/jena/rdf/model/ModelFactory.html) Happy holidays, Rinor Sefa -Original Message- From: Andy Seaborne Sent: Sunday, 26 December 2021 12:59 To: users@jena.apache.org Subject: Re: Javadoc links are broken? On 25/12/2021 11:35, Martynas Jusevičius wrote: > Hi, > > Happy holidays! > > Is it just me or most Javadoc links are broken? Or is it a Google > indexing problem? The Apache Jena project is not responsible for Google indexing :-) > For example: > https://jena.apache.org/documentation/javadoc/rdfconnection/org/apache > /jena/rdfconnection/RDFDatasetConnection.html Java11 javadoc is quite different to java8 javadoc. The material is there if you navigate to it. https://jena.apache.org/documentation/javadoc/rdfconnection/org.apache.jena.rdfconnection/org/apache/jena/rdfconnection/RDFDatasetConnection.html > https://jena.apache.org/documentation/javadoc/arq/org/apache/jena/quer > y/DatasetAccessor.html Not in the codebase. > Those are the links I get searching Google for "RDFDatasetConnection" > and "DatasetAccessor" and both return "Not Found". > > Martynas >
