Re: Fuseki with a web.xml
On 09/01/15 22:11, Trevor Donaldson wrote: Is it possible to have a Web.xml file with fuseki. I would like to setup a filter element. Is this possible? Yes. See Fuseki2 which is all web.xml driven including as a WAR file. (It already uses a servlet filter to put Apache Shiro onto the dispatch patch for security handling.) Artifacts: jena-fuseki-server -- standalone jar jena-fuseki-war -- war file form jena-fuseki-dist -- for the binary distribution somewhat like Fuseki1 see the webapp/ directory for the web.xml. Andy
Re: Fuseki with a web.xml
Awesome. That is exactly what I was trying to do. Use shiro. Woohoo. Is there an example utilizing Shiro and fuseki? On Jan 9, 2015 6:45 PM, Andy Seaborne a...@apache.org wrote: On 09/01/15 22:11, Trevor Donaldson wrote: Is it possible to have a Web.xml file with fuseki. I would like to setup a filter element. Is this possible? Yes. See Fuseki2 which is all web.xml driven including as a WAR file. (It already uses a servlet filter to put Apache Shiro onto the dispatch patch for security handling.) Artifacts: jena-fuseki-server -- standalone jar jena-fuseki-war -- war file form jena-fuseki-dist -- for the binary distribution somewhat like Fuseki1 see the webapp/ directory for the web.xml. Andy
RE: Fuseki with a web.xml
I haven't looked at Fuseki2 in a few weeks but did finally get a version deployed with includes both a TDB and an SDB datastore, running under Tomcat. I've got a project for which I'll need to use Fuseki and would like to use Fuseki2 but last time I used it there were still a number of things that didn't look complete, primarily with the admin interface. How much progress has been made on that? When you consider Fuseki2 to be production ready? -Original Message- From: Andy Seaborne [mailto:a...@apache.org] Sent: Friday, January 9, 2015 6:43 PM To: users@jena.apache.org Subject: Re: Fuseki with a web.xml On 09/01/15 22:11, Trevor Donaldson wrote: Is it possible to have a Web.xml file with fuseki. I would like to setup a filter element. Is this possible? Yes. See Fuseki2 which is all web.xml driven including as a WAR file. (It already uses a servlet filter to put Apache Shiro onto the dispatch patch for security handling.) Artifacts: jena-fuseki-server -- standalone jar jena-fuseki-war -- war file form jena-fuseki-dist -- for the binary distribution somewhat like Fuseki1 see the webapp/ directory for the web.xml. Andy
RE: Fuseki with a web.xml
Not production ready, yet? Oh no. :-( On Jan 9, 2015 6:59 PM, John A. Fereira ja...@cornell.edu wrote: I haven't looked at Fuseki2 in a few weeks but did finally get a version deployed with includes both a TDB and an SDB datastore, running under Tomcat. I've got a project for which I'll need to use Fuseki and would like to use Fuseki2 but last time I used it there were still a number of things that didn't look complete, primarily with the admin interface. How much progress has been made on that? When you consider Fuseki2 to be production ready? -Original Message- From: Andy Seaborne [mailto:a...@apache.org] Sent: Friday, January 9, 2015 6:43 PM To: users@jena.apache.org Subject: Re: Fuseki with a web.xml On 09/01/15 22:11, Trevor Donaldson wrote: Is it possible to have a Web.xml file with fuseki. I would like to setup a filter element. Is this possible? Yes. See Fuseki2 which is all web.xml driven including as a WAR file. (It already uses a servlet filter to put Apache Shiro onto the dispatch patch for security handling.) Artifacts: jena-fuseki-server -- standalone jar jena-fuseki-war -- war file form jena-fuseki-dist -- for the binary distribution somewhat like Fuseki1 see the webapp/ directory for the web.xml. Andy
How to update fuseki from a local model?
Hi all, Is there a way to take a temp model and send the result to fuseki? What I would like to accomplish : 1. Insert / delete triples in temp model 2. Send results (inserts and deletes) to fuseki to have it update the named graph Is this possible or do I need to do build the sparql queries manually? Thanks
Re: Graph traversal and Jena TDB
There was some interesting research from Microsoft about their Trinity RDF store, could be relevant here: http://research.microsoft.com/apps/pubs/default.aspx?id=183717 On Fri, Jan 9, 2015 at 7:05 PM, Andy Seaborne a...@apache.org wrote: On 09/01/15 11:08, Olivier Rossel wrote: Hi everyone. I have this (classical) graph traversal use case: in a graph, let's find all the paths from resource A to resource B. AFAIU, SPARQL has a dedicated syntax for that. http://www.w3.org/TR/sparql11-query/#propertypaths (called property path). Yes-ish. You can write ?x :property* ?y . You can't find out about the path chosen, e.g. length (or how many). ?var* is illegal but there are tricks for any property like usage with NegatedPropertySets (probably perform badly). In my use case, the property paths to match have unknown length. I think Virtuoso stores triples in a g,s,p,o table. So property paths of unknown length will be translated into a massive amount of self-joins. Does it sound right? Ask Openlink? Seems likely. As ever there are implementation choices - in RDF stores, self-joins are usually not bad (and they are very common). How would TDB handle those property paths? With a similar strategy? Yes [*] ([*] unless you run some magic in the query execution engine, for example, to support RDFS at scale.) And then, the graph databases. Of several different kinds - Apache Giraph is very different to Neo4J in target usage. https://giraph.apache.org/ https://spark.apache.org/graphx/ Do they have an internal structure that makes this graph traversal more natural? Or do they rely, eventually, on similar strategies? It's hard to answer simply - it depends on how you look at them. One step of parallel graph traversal looks very much like a join to me. Neo claim they have no joins because they have pointers (it's comceptually an in-memory design as described in the Graph Databases book - the design has moved on since that description). I'd say that looking at all the pointer following in parallel, the pointers are remarkably like index joins and hash tables, especially as it goes cluster. http://graphdatabases.com/ The analytics engines - Apache Giraph and many others - are fundamentally different. They are node engines with highly parallel transversal. Designing Data-Intensive Applications has some material on graph databases. http://shop.oreilly.com/product/0636920032175.do Andy Any help of that subject would be of great interest.
Re: How to update fuseki from a local model?
I think building the sparql manually is the way to go. On Fri, Jan 9, 2015 at 1:23 PM, Trevor Donaldson tmdona...@gmail.com wrote: @Andy - Yes there are bNodes in it. On Fri, Jan 9, 2015 at 12:49 PM, Andy Seaborne a...@apache.org wrote: On 09/01/15 15:13, Trevor Donaldson wrote: Hi all, Is there a way to take a temp model and send the result to fuseki? What I would like to accomplish : 1. Insert / delete triples in temp model 2. Send results (inserts and deletes) to fuseki to have it update the named graph Is this possible or do I need to do build the sparql queries manually? Thanks DatasetAccessor (the SPARQL Graph Store Protocol) might be worth a look - but it works on whole graphs so delete some triples out of a large graph is not something it can do. Otherwise, building SPARQL is probably the way to go. INSERT DATA, DELETE DATA if no (Is there any builder code to help with this? Seems like a good thing to have to build INSERT DATA, DELETE DATA operations) Trevor - does the data have bNodes in it? Andy Looking further out ... At a lower level, there is RDF Patch http://afs.github.io/rdf-patch/ and some code in: https://github.com/afs/jena-rdfpatch through I have got sidetracked by a binary version of this based on http://afs.github.io/rdf-thrift/
Re: How to update fuseki from a local model?
@Andy - Yes there are bNodes in it. On Fri, Jan 9, 2015 at 12:49 PM, Andy Seaborne a...@apache.org wrote: On 09/01/15 15:13, Trevor Donaldson wrote: Hi all, Is there a way to take a temp model and send the result to fuseki? What I would like to accomplish : 1. Insert / delete triples in temp model 2. Send results (inserts and deletes) to fuseki to have it update the named graph Is this possible or do I need to do build the sparql queries manually? Thanks DatasetAccessor (the SPARQL Graph Store Protocol) might be worth a look - but it works on whole graphs so delete some triples out of a large graph is not something it can do. Otherwise, building SPARQL is probably the way to go. INSERT DATA, DELETE DATA if no (Is there any builder code to help with this? Seems like a good thing to have to build INSERT DATA, DELETE DATA operations) Trevor - does the data have bNodes in it? Andy Looking further out ... At a lower level, there is RDF Patch http://afs.github.io/rdf-patch/ and some code in: https://github.com/afs/jena-rdfpatch through I have got sidetracked by a binary version of this based on http://afs.github.io/rdf-thrift/
Re: How to update fuseki from a local model?
Andy - builder code like this? https://github.com/Graphity/graphity-client/blob/master/src/main/java/org/graphity/processor/update/InsertDataBuilder.java It is based on SPIN though, not on Jena directly. On Fri, Jan 9, 2015 at 6:49 PM, Andy Seaborne a...@apache.org wrote: On 09/01/15 15:13, Trevor Donaldson wrote: Hi all, Is there a way to take a temp model and send the result to fuseki? What I would like to accomplish : 1. Insert / delete triples in temp model 2. Send results (inserts and deletes) to fuseki to have it update the named graph Is this possible or do I need to do build the sparql queries manually? Thanks DatasetAccessor (the SPARQL Graph Store Protocol) might be worth a look - but it works on whole graphs so delete some triples out of a large graph is not something it can do. Otherwise, building SPARQL is probably the way to go. INSERT DATA, DELETE DATA if no (Is there any builder code to help with this? Seems like a good thing to have to build INSERT DATA, DELETE DATA operations) Trevor - does the data have bNodes in it? Andy Looking further out ... At a lower level, there is RDF Patch http://afs.github.io/rdf-patch/ and some code in: https://github.com/afs/jena-rdfpatch through I have got sidetracked by a binary version of this based on http://afs.github.io/rdf-thrift/
Re: Graph traversal and Jena TDB
On 09/01/15 11:08, Olivier Rossel wrote: Hi everyone. I have this (classical) graph traversal use case: in a graph, let's find all the paths from resource A to resource B. AFAIU, SPARQL has a dedicated syntax for that. http://www.w3.org/TR/sparql11-query/#propertypaths (called property path). Yes-ish. You can write ?x :property* ?y . You can't find out about the path chosen, e.g. length (or how many). ?var* is illegal but there are tricks for any property like usage with NegatedPropertySets (probably perform badly). In my use case, the property paths to match have unknown length. I think Virtuoso stores triples in a g,s,p,o table. So property paths of unknown length will be translated into a massive amount of self-joins. Does it sound right? Ask Openlink? Seems likely. As ever there are implementation choices - in RDF stores, self-joins are usually not bad (and they are very common). How would TDB handle those property paths? With a similar strategy? Yes [*] ([*] unless you run some magic in the query execution engine, for example, to support RDFS at scale.) And then, the graph databases. Of several different kinds - Apache Giraph is very different to Neo4J in target usage. https://giraph.apache.org/ https://spark.apache.org/graphx/ Do they have an internal structure that makes this graph traversal more natural? Or do they rely, eventually, on similar strategies? It's hard to answer simply - it depends on how you look at them. One step of parallel graph traversal looks very much like a join to me. Neo claim they have no joins because they have pointers (it's comceptually an in-memory design as described in the Graph Databases book - the design has moved on since that description). I'd say that looking at all the pointer following in parallel, the pointers are remarkably like index joins and hash tables, especially as it goes cluster. http://graphdatabases.com/ The analytics engines - Apache Giraph and many others - are fundamentally different. They are node engines with highly parallel transversal. Designing Data-Intensive Applications has some material on graph databases. http://shop.oreilly.com/product/0636920032175.do Andy Any help of that subject would be of great interest.
Re: How to update fuseki from a local model?
On 09/01/15 15:13, Trevor Donaldson wrote: Hi all, Is there a way to take a temp model and send the result to fuseki? What I would like to accomplish : 1. Insert / delete triples in temp model 2. Send results (inserts and deletes) to fuseki to have it update the named graph Is this possible or do I need to do build the sparql queries manually? Thanks DatasetAccessor (the SPARQL Graph Store Protocol) might be worth a look - but it works on whole graphs so delete some triples out of a large graph is not something it can do. Otherwise, building SPARQL is probably the way to go. INSERT DATA, DELETE DATA if no (Is there any builder code to help with this? Seems like a good thing to have to build INSERT DATA, DELETE DATA operations) Trevor - does the data have bNodes in it? Andy Looking further out ... At a lower level, there is RDF Patch http://afs.github.io/rdf-patch/ and some code in: https://github.com/afs/jena-rdfpatch through I have got sidetracked by a binary version of this based on http://afs.github.io/rdf-thrift/
Re: Inferencing
Hello Dave and everyone I have run into one more issue I have a class “A” and “B” in my ontology for which i have added an equivalent class from “Schema.orghttp://Schema.org” and “DBPedia” ontologies (This is to provide external context). Now when i run the reasoner to inter data against my ontology (using OWLMINI or OWLMICRO”), takes a very long time to produce results. So, i started using Pellet to reason my ontologies, but pellet doesn’t reason unless i put ontology and the data in the same model . 1) How can i improve the speed of OWLMINI and OWLMICRO to reason DBPEDIA and Schema.orghttp://Schema.org 2) Why wouldn’t the following statement work for Pellet ? Reasoner reasoner = ontModelSpec.getReasoner(); Reasoner boundReasoner = reasoner.bindSchema(ontModel); infModel = ModelFactory.createInfModel(boundReasoner, model); my infidel does not have inferred statements if i use pellet Thanks Kamalraj On 8 Jan 2015, at 9:44 pm, Dave Reynolds dave.e.reyno...@gmail.commailto:dave.e.reyno...@gmail.com wrote: On 08/01/15 10:35, Kamalraj Jairam wrote: Hi Dave, Your solution worked. I thought the transitive reasoner handled more axioms than Micro_Rule. No, as it says in the docs the transitive reasoner is very minimal it is mostly there as a building block for the more useful reasoners: https://jena.apache.org/documentation/inference/index.html#transitive Are there any documentation in the Jena site which shows what entailment does each of these Jena reinsures handle? Yes, the coverage of the different OWL options outlined in: https://jena.apache.org/documentation/inference/index.html#OWLcoverage Dave
Re: How to update fuseki from a local model?
Could I possible do this ? DatasetAccessor dataAccessor = DatasetAccessorFactory.createHTTP(http//localhost:3030/ds); Model model = dataAcessor.getModel(); OntModel ontmodel = ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM); ontmodel.add(model); //add, remove etc... do dataAcessor.add(ontmodel); Would this do what I want? This seems like overkill for what I need to do. All I want to do is update a particular graph with new statements or remove old statements. On Fri, Jan 9, 2015 at 1:32 PM, Martynas Jusevičius marty...@graphity.org wrote: Andy - builder code like this? https://github.com/Graphity/graphity-client/blob/master/src/main/java/org/graphity/processor/update/InsertDataBuilder.java It is based on SPIN though, not on Jena directly. On Fri, Jan 9, 2015 at 6:49 PM, Andy Seaborne a...@apache.org wrote: On 09/01/15 15:13, Trevor Donaldson wrote: Hi all, Is there a way to take a temp model and send the result to fuseki? What I would like to accomplish : 1. Insert / delete triples in temp model 2. Send results (inserts and deletes) to fuseki to have it update the named graph Is this possible or do I need to do build the sparql queries manually? Thanks DatasetAccessor (the SPARQL Graph Store Protocol) might be worth a look - but it works on whole graphs so delete some triples out of a large graph is not something it can do. Otherwise, building SPARQL is probably the way to go. INSERT DATA, DELETE DATA if no (Is there any builder code to help with this? Seems like a good thing to have to build INSERT DATA, DELETE DATA operations) Trevor - does the data have bNodes in it? Andy Looking further out ... At a lower level, there is RDF Patch http://afs.github.io/rdf-patch/ and some code in: https://github.com/afs/jena-rdfpatch through I have got sidetracked by a binary version of this based on http://afs.github.io/rdf-thrift/
Re: How to update fuseki from a local model?
I take that back. I am unable to pull back the named graph. That will not work for me. Looks like manual statements it is. On Fri, Jan 9, 2015 at 2:47 PM, Trevor Donaldson tmdona...@gmail.com wrote: Could I possible do this ? DatasetAccessor dataAccessor = DatasetAccessorFactory.createHTTP(http//localhost:3030/ds); Model model = dataAcessor.getModel(); OntModel ontmodel = ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM); ontmodel.add(model); //add, remove etc... do dataAcessor.add(ontmodel); Would this do what I want? This seems like overkill for what I need to do. All I want to do is update a particular graph with new statements or remove old statements. On Fri, Jan 9, 2015 at 1:32 PM, Martynas Jusevičius marty...@graphity.org wrote: Andy - builder code like this? https://github.com/Graphity/graphity-client/blob/master/src/main/java/org/graphity/processor/update/InsertDataBuilder.java It is based on SPIN though, not on Jena directly. On Fri, Jan 9, 2015 at 6:49 PM, Andy Seaborne a...@apache.org wrote: On 09/01/15 15:13, Trevor Donaldson wrote: Hi all, Is there a way to take a temp model and send the result to fuseki? What I would like to accomplish : 1. Insert / delete triples in temp model 2. Send results (inserts and deletes) to fuseki to have it update the named graph Is this possible or do I need to do build the sparql queries manually? Thanks DatasetAccessor (the SPARQL Graph Store Protocol) might be worth a look - but it works on whole graphs so delete some triples out of a large graph is not something it can do. Otherwise, building SPARQL is probably the way to go. INSERT DATA, DELETE DATA if no (Is there any builder code to help with this? Seems like a good thing to have to build INSERT DATA, DELETE DATA operations) Trevor - does the data have bNodes in it? Andy Looking further out ... At a lower level, there is RDF Patch http://afs.github.io/rdf-patch/ and some code in: https://github.com/afs/jena-rdfpatch through I have got sidetracked by a binary version of this based on http://afs.github.io/rdf-thrift/
Fuseki with a web.xml
Is it possible to have a Web.xml file with fuseki. I would like to setup a filter element. Is this possible?
Re: How to update fuseki from a local model?
On 09/01/15 19:47, Trevor Donaldson wrote:
Could I possible do this ?
For the adds, yes.
DatasetAccessor dataAccessor =
DatasetAccessorFactory.createHTTP(http//localhost:3030/ds);
Model model = dataAcessor.getModel();
OntModel ontmodel = ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM);
ontmodel.add(model);
//add, remove etc... do
dataAcessor.add(ontmodel);
// Default graph
dataAccessor.add(, Model data) ;
// Named graph
dataAccessor.add(String graphUri, Model data) ;
The DatasetAccessor reflects the structure of the dataset in the server.
Would this do what I want? This seems like overkill for what I need to
do. All I want to do is update a particular graph with new statements
or remove old statements.
Remove is the hard part if that includes blank nodes.
You need to find the blank node with a DELETE {} WHERE {} or it's short
form DELETE WHERE {}.
Andy
On Fri, Jan 9, 2015 at 1:32 PM, Martynas Jusevičius marty...@graphity.org
wrote:
Andy - builder code like this?
https://github.com/Graphity/graphity-client/blob/master/src/main/java/org/graphity/processor/update/InsertDataBuilder.java
It is based on SPIN though, not on Jena directly.
On Fri, Jan 9, 2015 at 6:49 PM, Andy Seaborne a...@apache.org wrote:
On 09/01/15 15:13, Trevor Donaldson wrote:
Hi all,
Is there a way to take a temp model and send the result to fuseki?
What I would like to accomplish :
1. Insert / delete triples in temp model
2. Send results (inserts and deletes) to fuseki to have it update the
named
graph
Is this possible or do I need to do build the sparql queries manually?
Thanks
DatasetAccessor (the SPARQL Graph Store Protocol) might be worth a look -
but it works on whole graphs so delete some triples out of a large graph
is
not something it can do.
Otherwise, building SPARQL is probably the way to go. INSERT DATA,
DELETE
DATA if no
(Is there any builder code to help with this? Seems like a good thing to
have to build INSERT DATA, DELETE DATA operations)
Trevor - does the data have bNodes in it?
Andy
Looking further out ...
At a lower level, there is RDF Patch
http://afs.github.io/rdf-patch/
and some code in:
https://github.com/afs/jena-rdfpatch
through I have got sidetracked by a binary version of this based on
http://afs.github.io/rdf-thrift/
Graph traversal and Jena TDB
Hi everyone. I have this (classical) graph traversal use case: in a graph, let's find all the paths from resource A to resource B. AFAIU, SPARQL has a dedicated syntax for that. (called property path). In my use case, the property paths to match have unknown length. I think Virtuoso stores triples in a g,s,p,o table. So property paths of unknown length will be translated into a massive amount of self-joins. Does it sound right? How would TDB handle those property paths? With a similar strategy? And then, the graph databases. Do they have an internal structure that makes this graph traversal more natural? Or do they rely, eventually, on similar strategies? Any help of that subject would be of great interest.
