Re: Question about Jena capabilities/requirements

2022-03-09 Thread Andy Seaborne
On 09/03/2022 09:33, Goławski, Paweł wrote: Most of data being stored could be treat as dictionaries, so updates will be rather big but rarely. The number of simultaneous reads could be a few hundred maybe. Queries will need also Micro OWL Reasoner (at least) and acceptable response time is

Re: SHACL-based data extraction from a knowledge graph

2022-03-09 Thread Thomas Francart
What is VLib.validateShape actually returns the focusNode + Path + valueNodes that conform to each shape ? or emit them through a listener ? ( https://github.com/apache/jena/blob/5ce8c141d425655bcaa9d7567117659e502a7ff1/jena-shacl/src/main/java/org/apache/jena/shacl/validation/VLib.java#L89 ) The

Re: SHACL-based data extraction from a knowledge graph

2022-03-09 Thread Florian Kleedorfer
Am 2022-03-09 13:22, schrieb Thomas Francart: I think you could do it with jena. Load the dara into a Graph, then get the focus nodes for all shapes you want using VLib.focusNodes. evaluate each shape on its focus nodes and compile the intersection of all focus nodes that are valid, along

Re: SHACL-based data extraction from a knowledge graph

2022-03-09 Thread Thomas Francart
Thanks Florian ! I am following up the conversion on the Jena mailing list Le mer. 9 mars 2022 à 00:56, Florian Kleedorfer < florian.kleedor...@austria.fm> a écrit : > I think you could do it with jena. Load the dara into a Graph, then get > the focus nodes for all shapes you want using

Re: [4.3.2] Cannot invoke "org.apache.jena.rdf.model.Property.asNode()" because "org.apache.jena.vocabulary.RDF.type" is null

2022-03-09 Thread Andy Seaborne
On 09/03/2022 11:16, Martynas Jusevičius wrote: Hi, This appeared after Java upgrade from 11 to 17: WARN LocationMapper:188 - Error in configuration file: Cannot invoke "org.apache.jena.rdf.model.Property.asNode()" because "org.apache.jena.vocabulary.RDF.type" is null May be init related

[4.3.2] Cannot invoke "org.apache.jena.rdf.model.Property.asNode()" because "org.apache.jena.vocabulary.RDF.type" is null

2022-03-09 Thread Martynas Jusevičius
Hi, This appeared after Java upgrade from 11 to 17: WARN LocationMapper:188 - Error in configuration file: Cannot invoke "org.apache.jena.rdf.model.Property.asNode()" because "org.apache.jena.vocabulary.RDF.type" is null I was looking at the LocationMapper code, but line 188 does not contain

Streaming JSON RowSets (JENA-2302)

2022-03-09 Thread Claus Stadler
Dear all, I want to inform you of an active PR for making RowSets over application/sparql-reults+json streaming JIRA: https://issues.apache.org/jira/projects/JENA/issues/JENA-2302 PR: https://github.com/apache/jena/pull/1218 As nowadays JSON is the default content type used in Jena for

RE: Question about Jena capabilities/requirements

2022-03-09 Thread Goławski , Paweł
Most of data being stored could be treat as dictionaries, so updates will be rather big but rarely. The number of simultaneous reads could be a few hundred maybe. Queries will need also Micro OWL Reasoner (at least) and acceptable response time is crucial. > Hi Paweł, > > The amount CPU is