Re: there is a tutorial on the use of fuseki on jsp (JavaServer Pages), to be able to consult about the web platform

> On Nov 21, 2017, at 12:21, Manuel Quintero Fonseca wrote: > > Yes, I want to make a query with sparql in fuseki, to show the result in a > web. what has been researched, happens to use java for web pages JSP is > used in tomcat. You might have a good reason (or requirement) to use jsp, but i

Re: [JENA-DEV] SPARQL - Way to concat several property values

Data and query samples would help. (I could not see the image.) But from your problem description, you might try GROUP BY and the GROUP_CONCAT aggregate function. This would put (for example) all the properties of a subject in one result field, separated by the delimiter of your choice. See the d

Re: Example code

On Mon, 2018-03-19 at 20:01 +1000, David Moss wrote: > I agree, the technical documentation is not the place to keep basic how-to > examples. But with Jena the basic how-to examples seem to be missing entirely. > I have written GUI applications using the available examples from MYSQL. > MYSQL doe

Re: Delete all nested triples

On Wed, 2019-02-20 at 17:27 -0700, ganesh chandra wrote: > Hello All, > My data looks something like this: > a something:Entity ; > something:privateData [ a something:PrivateData ; > something:jsonContent "{\"fileType\": \”jp\"}"^^xsd:stri

programmatically construct UpdateDeleteInsert

I'm trying to construct a SPARQL update like: DELETE {?r ?p ?o. ?s ?p1 ?r.} WHERE {?r ex:foo "123"; ex:bar "456"; ?p ?o. OPTIONAL {?s ?p1 ?r} } In other words, delete all triples with subject or object resource that has certain ex:foo and ex:bar values. I can't see how to set or modify the DEL

Re: programmatically construct UpdateDeleteInsert

Never mind. I missed: QuadAcc deletes = upd.getDeleteAcc(); deletes.addTriple(/* triple pattern to delete */); Regards, --Paul On Thu, 2019-12-05 at 09:12 -0600, Paul Tyson wrote: > I'm trying to construct a SPARQL update like: > > DELETE {?r ?p ?o. ?s ?p1 ?r.} > WHER

how to set fuseki options under tomcat

On another thread Andy mentioned fuseki options arq:optIndexJoinStrategy and arq:optMergeBGPs, with example using "--set" command line option. How do you set these when running under tomcat? I could not find instructions or examples in the documentation. Thanks, --Paul

optimizing serialization of results from fuseki

I have a modest (17M triple) dataset, fairly flat graph. I run some queries selecting nodes with anywhere from 12-20 different property values. Result set counts are anywhere from 10,000 to 30,000 nodes. Total execution time measured at client are in the 30-40 second range. The web request begins

Re: optimizing serialization of results from fuseki

e (triple + filter), and it seems to be the more complicated filters that start to slow things down, as might be expected. Thanks for your comments and interest. The performance we're seeing is unacceptable for our application requirements, so I wanted to see if there were any other performance f

Re: optimizing serialization of results from fuseki

> Andy > > On 07/01/16 08:48, Håvard Mikkelsen Ottestad wrote: > > Hi, > > > > Reordering the filters might help. > > > > Also, maybe a stats file would reorder your query to be faster. I dunno how > > often (or if) fuseki generates a stats file. You can tr

Re: optimizing serialization of results from fuseki

t of string filters, and got much better results using Lucene add-on for that. Regards, --Paul > Håvard > > > > > On 07/01/16 03:51, "Paul Tyson" wrote: > > >On Wed, 2016-01-06 at 18:52 +, Andy Seaborne wrote: > >> Hi Paul, > &

Re: Optimising path to root concept SPARQL query

I don't know that you can get such results from sparql directly. I would get flat list of subclass relations in xml (.srx) or Json and then process with xslt or JavaScript to write out class hierarchy. Regards, --Paul > On Feb 1, 2016, at 07:05, Joël Kuiper wrote: > > This message has no cont

Re: XML to RDF

Håvard, 3 things: 1. You should announce this to the RDF and XML Interoperability W3C community group [1], and pursue this discussion there. 2. Were you aware of the early work on RDF schema for XML infoset? [2] 3. I agree with Martynas that XSLT is often a better way to specify and run transfor

Re: Relationship between similar columns from multiple databases

Yes, I am using R2RML to convert 4 big PLM DBs into RDF, load in Jena TDB and serve via fuseki for data mashups and inconsistency reports. Works very well. Best, --Paul > On Sep 7, 2016, at 13:39, Martynas Jusevičius wrote: > > I think R2RML and GRDDL could be of interest to you: > https://www

Re: Relationship between similar columns from multiple databases

gt; > Ontop looks promising: http://ontop.inf.unibz.it/ > >> On Wed, Sep 7, 2016 at 9:11 PM, Paul Tyson wrote: >> Yes, I am using R2RML to convert 4 big PLM DBs into RDF, load in Jena TDB >> and serve via fuseki for data mashups and inconsistency reports. Works very >

sparql algebra differences jena 2.13.0/3.n

I have some queries that worked fine in jena-2.13.0 but not in jena-3.1.0, using the same data. For a long time I've been running a couple dozen queries regularly over a large (900M triples) TDB, using jena-2.13.0. When I recently upgraded to jena-3.1.0, I found that 5 of these queries would not r

Re: sparql algebra differences jena 2.13.0/3.n

IF statement "Or(x,y)". The surface syntax doesn't make any difference in the algebra, does it? Regards, --Paul > On 14/09/16 02:01, Paul Tyson wrote: > > I have some queries that worked fine in jena-2.13.0 but not in > > jena-3.1.0, using the same data. > > >

Re: sparql algebra differences jena 2.13.0/3.n

> regex(?var4, "pat1") ) ) >} > { { ?var1 :p3 ?var4 } > UNION >{ ?var1 :p4 ?var4 } >} > } > > >Andy > > >> On 14/09/16 13:15, Paul Tyson wrote: >>> On Wed, 2016-09-14 at 10:57 +0100, And

Re: sparql algebra differences jena 2.13.0/3.n

} } I have noticed other cases where order of triples and bgps makes quite a difference in execution time, but I can't figure out any science to it. Are there any guidelines for ordering the components of a complex query (including UNION and OPTIONAL clauses) to optimize performance

Re: Construct query

On Thu, 2016-09-29 at 13:44 -0700, tina sani wrote: > I want to know about the Construct query. > How it differs from Select query One way to think about it, if you have any background in relational databases, is that SELECT returns a highly denormalized table (at least, from any non-trivial query

Re: Construct query

ke: CONSTRUCT {?s ex:hasResearch "C-SPARQL"} WHERE {?s rdf:type ex:Student; ex:hasCourse/rdfs:label "Intro to SPARQL"} Regards, --Paul > > On Fri, Sep 30, 2016 at 8:52 PM, Paul Tyson wrote: > > > On Thu, 2016-09-29 at 13:44 -0700, tina sani wrote: > >

Re: Applications/Projects Using Jena

As a contractor, I cannot disclose specific company information, but I have implemented a couple of large Jena projects. One is in the PLM (Product Lifecycle Management) domain. I extract part master and product structure from 4 enterprise data systems and load to TDB, using RDB2RDF (R2RML) des

Re: sum property values

There have been 2 different techniques mentioned that solve different problems. The SUM aggregate function can be used to reduce a result set as illustrated by the following minimal CSV snippets: BEFORE: ?v1,?v2 "A",1 "A",1 "A",2 "B",3 "B",1 AFTER: ?v1,?v3 "A",4 "B",4 The above results could b

Re: JSON-LD questions

On Jan 10, 2017, at 18:06, Grahame Grieve wrote: >> >> statements to describe the graph itself, e.g. here's a graph which >> identifies a particular person as the foaf:primaryTopic of the graph: >> >> { >> "@context": { >>"Person": "http://xmlns.com/foaf/0.1/Person";, >>"name": "htt

Re: JSON-LD questions

L). Regards, --Paul > >> On Wed, Jan 11, 2017 at 3:18 PM, Paul Tyson wrote: >> >> >> On Jan 10, 2017, at 18:06, Grahame Grieve >> wrote: >> >>>> >>>> statements to describe the graph itself, e.g. here's a graph which >>>&g

Re: Benefits of Semantic web

You might find this related discussion interesting: https://groups.google.com/forum/m/#!topic/ontolog-forum/AUzkFVhGrok Regards, --Paul > On Feb 10, 2017, at 11:02, David Jordan wrote: > > I agree that have some discussion about this is very useful. Many of us > have tried to evangelize semant

Re: SPARQL query

Maybe something like: Select ?s ?p ?o Where { ?s ?p ?o. Filter (?p in (:A, :B, :C)) Minus {?s ?p2 ?o2. Filter (!(?p2 in (:A, :B, :C)))} Untested. Regards, --Paul > On Mar 1, 2017, at 14:12, Claude Warren wrote: > > I have a graph where resources have a number of controlled properties. > Call

Re: Predicates with no vocabulary

Part of the fun (and ease) of RDF is being able to make stuff up as you go along. But, as others have said, when you move past the stage of learning and experimentation, and make your work persistent or reusable, you'll want to be more formal. The linked data patterns book [1] has several ideas

Re: How to make complex SPARQL queries reusable?

Another option is to express the query logic in standard rule notation, such as RIF, and translate to sparql. This approach is especially indicated if the sparql queries represent actual business rules. Regards, --Paul > On Apr 24, 2017, at 06:22, Andy Seaborne wrote: > > Simon, > > 1/ SpinR

Re: Return nested JSON results

On Tue, 2017-05-09 at 18:32 +, Dimov, Stefan wrote: > I’m also interested in having nested JSON results … > S. > > On 5/8/17, 11:06 PM, "Laura Morales" wrote: > > > I may have time to test if the change in this pull request [1] could > create such response. Feel free to comment there sh

Re: Return nested JSON results

Hi Laura, On Fri, 2017-05-12 at 09:45 +0200, Laura Morales wrote: > > I'm not sure I completely understand the use case that this approach is > > trying to address. But at best, it looks like a nonstandard, > > application-specific shortcut to produce something like a table with > > subrows. > >

Re: Return nested JSON results

On Sun, 2017-05-14 at 17:56 +, james anderson wrote: > good evening; > > > On 2017-05-14, at 19:30, Paul Tyson wrote: > > > > Hi Laura, > > > > On Fri, 2017-05-12 at 09:45 +0200, Laura Morales wrote: > >>> I'm not sure I completely under

Re: Return nested JSON results

On May 16, 2017, at 15:51, Laura Morales wrote: >> That's ok, but i wanted to know what kind of app is querying your Fuseki >> database? Only a hint.. I know it sounds 'fundamentally' not essential, >> but for 'me' it is the practice of developement. > > > Well yeah, I don't know why this wou

Re: Visualising Jena model saved in RDF/XML in the browser

On Sun, 2020-03-08 at 12:06 +0530, Diptendu Dutta wrote: > I have used Jena to generate RDF/XML of the model: > > xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"; > xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#";> > > > TheConsignor > > http://www.lke.co

Re: Visualising Jena model saved in RDF/XML in the browser

easier on a flat, > non-nested output. > RDF/XML is significant as a bridge format to the XML stack. > > Do you have an example of "useful schema-specific information presentations"? > > > Martynas > > On Mon, Mar 9, 2020 at 3:56 AM Paul Tyson wrote: &g

Re: [Apache Fuseki] Limits of Apache Fuseki Triple Store

Regarding first question: I maintain a dataset of 1 billion triples in a very old fuseki tdb version. I would like to know if anyone’s working in trillion triple range , perhaps with RDF/HDT. Regards, —Paul > On Jan 25, 2021, at 01:02, Marco Franke wrote: > >  > Dear developers, > > we us

Re: Scalability

On 7/23/21 12:32 PM, Matt Whitby wrote: A little bit of a vague question, and perhaps a silly one. How well does Jena scale? Would it tap out after a given number of triples? There are way too many variables to give a simple answer. I curate a dataset of 1 billion triples that is refreshed

Re: Ontology

Yes, off-topic, better forums would be ontolog-forum (http://ontologforum.org/info/) and semantic-...@w3.org. But, briefly: I have yet to see a good use case that would justify the expense and trouble of making a formal ontology. The most you will probably ever need is an RDFS schema, and that

Re: Java APIs

Hans-Jürgen, that sounds like an interesting and useful project. Can you post a website where we can get more information and follow the project? Thanks, --Paul On 2/5/22 18:34, Hans-Juergen Rennau wrote: Hello, I am interested in the integration of SPARQL into XQuery. The essential requireme

Re: JSON-LD: 1.0 or 1.1

> On Apr 23, 2022, at 12:16, Andy Seaborne wrote: > > What should the default settings be JSON-LD 1.0 or 1.1? > 1.1 would better meet my use cases. Thanks, —Paul

where is the RDF shapes action?

Can anyone point to websites, mailing lists, or other forum where users are discussing questions, use cases, and solutions involving RDF shapes (ShEx or SHACL)? There is plenty of technical information about both languages, but not so much real-world practical discussion. I recently started ex

Re: where is the RDF shapes action?

27, 2022, at 11:52, Paul Tyson wrote: > > Can anyone point to websites, mailing lists, or other forum where users are > discussing questions, use cases, and solutions involving RDF shapes (ShEx or > SHACL)? There is plenty of technical information about both languages, but > not

Re: where is the RDF shapes action?

fine so much in this area). Also Jena feature emerging: If you could look at PR 1256 and see if that can be used for your "informative" validation if not covered by validation reports. https://github.com/apache/jena/pull/1256  (Florian Kleedorfer)     Andy On 27/06/2022 17:51, Pa

Re: where is the RDF shapes action?

Hi Florian, Long ago I learned some about SPIN, which became SHACL. I thought back then it had quite a lot of potential to aid in RDF processing, but didn't have any use cases for it at the time More below. On 6/27/22 14:17, Florian Kleedorfer wrote: Am 2022-06-27 18:51, schrieb Paul

jena version java compatibility

Apologies for not paying close enough attention to the release history, but I need to find the latest jena version that runs in java 1.8. I know support for java8 was dropped somewhere in the 4.x series, but can't find where. My application must remain at java8 for the time being. Thanks in ad

sparql query performance jena v2, 3, 4

I maintain an old jena/fuseki application that has happily been using jena v2.13 and tdb v1.1.2 for several years. It loads 1b+ triples into a tdb database, and runs a couple dozen queries, some not so trivial, on the tdb. Now it is time to update things. I first went to 3.17, to stay on java8

Re: Database Migrations in Fuseki

I don't know if my experience is helpful, but I went a different way to solve these sorts of problems. I avoid adding business logic while generating the RDF from the source data systems. It is almost entirely a simple transliteration from one format to another (I use an R2RML mapping.) The pu

Re: SHACL

This is old, but might be useful. It has a chapter on SHACL. https://book.validatingrdf.com/ Regards, --Paul On 4/5/24 04:58, Hashim Khan wrote: Hi, I am interested in working with SHACL shapes for validation. I would like to know if someone points out a nice resource. Best,

skolemize a graph when loading

I searched the source and docs but didn't turn up any easy way to skolemize an input graph before loading to fuseki. The skolemization capabilities appear to be related to the reasoners, which I don't need. I expect there's a good reason for this missing feature, but wanted to ask if I've miss

Re: skolemize a graph when loading

ena/issues/2549 "More granular control over Blank node serialization" On 6/27/24 22:57, Martynas Jusevičius wrote: LinkedDataHub has a class that does that: https://github.com/AtomGraph/LinkedDataHub/blob/develop/src/main/java/com/atomgraph/linkeddatahub/server/util/Skolemizer.java On

Re: Tarql

There is ottr[1]. I plan to further evaluate it for easing the input burden on non-RDF specialists who must contribute to linked data. Regards, --Paul [1] https://www.ottr.xyz On 7/12/24 10:03, Shaw, Ryan wrote: Tarql is a very useful tool that has not been updated

fuseki service description and sparql service description

I have a few questions to help me figure out the relationship between fuseki service descriptions and the SPARQL service-description schema [1]. My goal is to translate between fuseki:* and sd:* graphs, to use fuseki:* internally in the app, and expose service information as sd:* graphs. Is t

jena-text indexing fields with KeywordAnalyzer

I just tried out the jena-text indexing and query capabilities of jena 2.11. Great stuff, but the property values I indexed contain part numbers that frequently contain hyphens. Apparently Lucene's StandardAnalyzer tokenizes on hyphens, so my initial search results were quite puzzling. However, ev

Re: jena-text indexing fields with KeywordAnalyzer

On Mon, 2014-03-17 at 12:58 +, bwm-epimorphics wrote: > On 14/03/14 00:51, Paul Tyson wrote: > > [...] > > Has anyone else encountered this problem? > I have. I have an application that may require using either a different > analyzer or the StandardAnalyzer with a

Re: Sparql To SQL

On Sun, 2014-03-30 at 09:37 +, Kamalraj Jairam wrote: > Hello All, > > Whats the best way to convert sparql to SQL using R2RML mappings > > and convert resultset from DB to RDF? > What are the givens? Do you have existing SPARQL text written against some RDF produced by some existing R2RML

Re: Configuring Jena TDB for a benchmark

On Sat, 2014-04-19 at 18:33 +0100, Saud Aljaloud wrote: > Dear Jena folks, > > We are investigating how efficient different triple stores, including > Jena TDB, handle literal strings within SPARQL. To this end, We are > now working on benchmarking these triple stores against a set of > specifi

text query analyzer problem

I've been using the configurable text query analyzer in jena 2.11.2 (fuseki 1.0.2) since it was provided by JENA-654. I use the KeywordAnalyzer to index a field that contains part numbers, which are mostly composed of digits with dashes, but a fair amount of alphabetic characters. I just noticed a

Re: text query analyzer problem

production) and I think I'd have noticed if the query parser would have used > a different Analyzer than the indexer. > > -Osma > >> On 19/09/14 04:30, Paul Tyson wrote: >> I've been using the configurable text query analyzer in jena 2.11.2 >> (fuseki 1.0.2)

Re: XXXX-Large TDB (suggestion wanted)

Jacek, Sorry, I wasn't paying close attention to this thread, but saw your last comment and wanted to chime in. Of course jena/fuseki (nor any RDF system) can't compete with SQL in the things SQL is good at. I load 760M triples in about 8 hours on a Linux VM on what is by now probably a middle-o

Re: Is this a good way to get started?

Hi Nate, I don't know if your questions were about Rob's particular application, or just in general, but I'll jump in with a few generic responses in areas I'm familiar with. On Thu, 2014-12-11 at 17:48 -0500, Nate Marks wrote: > This is great feedback. Thanks for taking the time. If you wouldn

hot swap tdb behind fuseki

I've looked through the user documentation but did not find a clue to this problem. I have not dug too deeply into the code. The problem is to safely re-initialize a running fuseki server to read a new tdb location. I've thought of using 2 (or more) jetty or tomcat workers in a load-balancing con

Re: hot swap tdb behind fuseki

f Fuseki 2 you would have to make a new > database name for every swap and copy the tdb store into that before > adding it in the user interface. You could probably hide/simplify > that name from the URI with a simple Apache httpd ProxyPass or > RewriteRule Thanks for the pointers

Re: hot swap tdb behind fuseki

to the database - it depends on the scale of the system). > > Andy > > [1] > http://bugs.java.com/view_bug.do?bug_id=4724038 > and several others. > > On 11/02/15 00:07, Paul Tyson wrote: > > On Tue, 2015-02-10 at 23:38 +, Stian Soiland-Reyes wrote: >

Re: hot swap tdb behind fuseki

On Fri, 2015-02-13 at 16:49 +, Andy Seaborne wrote: > On 12/02/15 22:09, Paul Tyson wrote: > > On Wed, 2015-02-11 at 10:53 +, Andy Seaborne wrote: > >> Paul, > >> > >> You can add a new, pre-built database to a running Fuseki2 server with a > >>

named graph impact on query performance

Hi, Any theoretical reasons or evidence that lots of named graphs in a TDB repository will adversely affect query performance? For example, 50,000 named graphs containing total of 11 million triples. Some queries will be for specific graphs, but most will be union queries over the entire reposit

Re: named graph impact on query performance

f course if performance sucks that would jeopardize its viability, with TDB anyway. Regards, --Paul > > On Sun, Apr 12, 2015 at 3:10 AM, Paul Tyson wrote: > > Hi, > > > > Any theoretical reasons or evidence that lots of named graphs in a TDB > > repositor

fuseki ontmodel capacity

Before working through the configuration of an ontology model in fuseki2, I wanted to ask if anyone has experience with large models. I estimate there will be 250K class definitions, about 40M triples. My queries will be for instance checking: select ?class where { _:a rdf:type ?class; ex:p1 "v

fuseki2 ontmodel config

I cannot piece together a workable configuration for fuseki2 with an OntModel. Combining the config-tdb-dir template with info from http://jena.markmail.org/message/wr3f6gy5orxbszyd I get the config shown below. When I put this as file "tdb-owl.ttl" in the FUSEKI_BASE/configuration directory, fus

Re: fuseki2 ontmodel config

Thanks Andy. Simple fix, noted below. However, it turns out I have OWL2 constructs (datatype restrictions) that apparently are not handled by the Jena OWL reasoners. On Thu, 2015-06-25 at 12:56 +0100, Andy Seaborne wrote: > Hi Paul, > > On 25/06/15 03:42, Paul Tyson wrote: > >

Re: fuseki ontmodel capacity

Hi Andy, no joy yet. On Wed, 2015-06-24 at 22:36 +0100, Andy Seaborne wrote: > On 24/06/15 21:37, Paul Tyson wrote: > > Before working through the configuration of an ontology model in > > fuseki2, I wanted to ask if anyone has experience with large models. > > > > I

Re: fuseki ontmodel capacity

Hi Andy, further questions below. On Fri, 2015-06-26 at 18:47 +0100, Andy Seaborne wrote: > On 25/06/15 17:35, Paul Tyson wrote: > > Hi Andy, no joy yet. > > > > On Wed, 2015-06-24 at 22:36 +0100, Andy Seaborne wrote: > >> On 24/06/15 21:37, Paul Tyson wrote: &g

fuseki 2.3.0 startup failed in tomcat

I dropped fuseki.war in webapps directory of tomcat. The server.xml has been configured to support another big webapp, but as far as I can tell should not exclude other webapps from running. fuseki fails to start and leaves these messages in log. Can anyone give a clue where to look for root caus

Re: fuseki 2.3.0 startup failed in tomcat

Never mind, this was an unrelated problem in server.xml file. Regards, --Paul On Sat, 2015-08-15 at 12:06 -0500, Paul Tyson wrote: > I dropped fuseki.war in webapps directory of tomcat. > > The server.xml has been configured to support another big webapp, but as > far as I can tel

fuseki 2.3.0 under tomcat SSL

Fuseki 2.3.0 is installed in tomcat 8 with SSL configured. When trying to add a dataset through the admin console, it fails with message "Not found". The URL it is POSTing to looks like: https://server.example.com/fuseki/443//server.example.com:/fuseki/$/datasets Any ideas about the cause or so

Re: fuseki 2.3.0 under tomcat SSL

On Wed, 2015-10-14 at 22:38 +0100, Andy Seaborne wrote: > On 14/10/15 04:05, Paul Tyson wrote: > > Fuseki 2.3.0 is installed in tomcat 8 with SSL configured. > > > > When trying to add a dataset through the admin console, it fails with > > message "Not found&qu

Fuseki tomcat CORS problem

When sending a CORS XMLHttpRequest to https sparql endpoint we get the following report in stdout and the query fails. Presumably this is coming from the preflight OPTIONS request required of CORS. Using 2.3.1#46 in tomcat8 with default CORS configuration in web.xml. [2015-10-22 17:30:54] Fus

Re: Fuseki tomcat CORS problem

apache/jena/fuseki/TestHttpOptions.java#L32 > > If that's not the case, a failing test case would be good if there are > environmental factors. Works fine in our environment. Thanks, --Paul > > Andy > > > > > > > On 23/10/15 01:31, Paul Tyson wrote: >

delete/insert problem with tdbupdate

DELETE/INSERT operation does not work as expected using tdbupdate in jena-3.0.0. Starting with an empty TDB, I run the following two updates. The first works as expected, adding 6 triples. The second should remove those triples and add 9 new ones. Instead, the graph now has 20 triples. I did not a

Re: delete/insert problem with tdbupdate

do not have any matching records yet in the dataset, as well as those that have been populated with the INSERT triples. The ex:gAlt property on ex:Thing1 instances is optional. If the outer OPTIONAL were removed we would need different patterns based on whether the dataset already held the target tri

Re: delete/insert problem with tdbupdate

I guess I had some wrong assumptions about DELETE/INSERT. Will review spec more closely. Takeaway for me is that in general DELETE/INSERT is not equivalent to DELETE followed by INSERT. Thanks, --Paul > On Nov 2, 2015, at 03:34, Andy Seaborne wrote: > >> On 01/11/15 23:00, Paul

stream turtle to TDBLoader

Hi, I'm trying to use the TDBLoader api to stream turtle to the bulk loader to create a new TDB repository. I suspect none of the TDBLoader.load*() methods accept turtle input. I'm using version 2.10.1. This sort of code produces an immediate RIOT exception: InputStream is = ...; Dataset ds = T

Re: stream turtle to TDBLoader

-powered machine. Regards, --Paul On Thu, 2013-05-16 at 12:50 +0100, Andy Seaborne wrote: > On 16/05/13 04:21, Paul Tyson wrote: > > Hi, > > > > I'm trying to use the TDBLoader api to stream turtle to the bulk loader > > to create a new TDB repository. > > &g

sparql performance parameters and limitations

I'm seeking guidance for setting expectations for TDB sparql performance as the size and complexity of the queries grows. The dataset has about 600 million triples, around 200 million non-literal nodes, about 500 predicates. I generate sparql queries from logical rules, which as it turns out can