It might not be the traditional solution, but I've done some SPARQL query
transformations with RDF/XML and XSLT 2.
It doesn't work on the algebra level, but rather on the SPIN serialization.
It might or might not be easier than Java code. I don't know if that
applies in your case.
Martynad
Thanks, I didn't realize XMLLiterals have to be canonical.
You don't mean XMLLiterals are going away, do you?
Escaped XML would cut off all XML processing tools (I heavily use XSLT
on RDF/XML, for example).
Martynas
On Mon, Jun 25, 2012 at 2:43 PM, Damian Steer d.st...@bristol.ac.uk wrote:
Joan,
could Graphity approach be similar to what you have in mind?
http://www.w3.org/2011/09/LinkedData/ledp2011_submission_1.pdf
You can see what kind of UI it can render on http://linkeddata.dk.
Martynas
graphity.org
On Mon, Jun 25, 2012 at 7:57 PM, Joan Iglesias joan.igles...@live.com
Joan,
Graphity also allows defining XHTML templates, so the layout and
functionallity is fully customizable. You can include all the
libraries you want, but the platform doesn't deal with client-side
much -- linkeddata.dk is just one of the possible layouts.
Do you mean http://www.zkoss.org? If
Holger,
does that also mean a new release of SPIN API which will be packaged
with the latest Jena?
Martynas
On Tue, Jun 26, 2012 at 1:33 AM, Holger Knublauch hol...@knublauch.com wrote:
We are now starting the process of upgrading our platform to the latest Jena
version(s). I noticed that SDB
Have you tried TDB? I think it's currently more actively developed and more
performant.
On Jun 26, 2012 1:55 AM, Holger Knublauch hol...@knublauch.com wrote:
Yes this is my hope, assuming SDB still works for us.
Holger
On 6/26/2012 9:46, Martynas Jusevičius wrote:
Holger,
does that also
Note that the statement seems to point to a bNode so a simple remove is
probably not enough anyway.
Dave, can you elaborate on this a little?
What I'm trying to do, is to replace such ORDER BY expression
sp:orderBy ([ a sp:Desc ;
sp:expression
Joan,
take a look at the recent Graphity release, which enables a full
read/write RDF round-trip with Jena- and JAX-RS-compatible components:
https://github.com/Graphity/graphity-browser
Martynas
graphity.org
On Tue, Jun 26, 2012 at 1:27 AM, Joan Iglesias joan.igles...@live.com wrote:
I've
Hey Milorad,
not 100% sure but could this thread be relevant?
http://lists.w3.org/Archives/Public/semantic-web/2012Jul/0082.html
Martynas
graphity.org
On Thu, Oct 25, 2012 at 12:07 PM, Milorad Tosic mbto...@yahoo.com wrote:
Hi,
I may missed something fundamental about OWL, so would someone
There's another way to modify queries dynamically - as RDF using SPIN
vocabulary:
http://www.w3.org/Submission/2011/SUBM-spin-modeling-20110222/
Example QueryBuilder class:
https://github.com/Graphity/graphity-ldp/blob/master/src/main/java/org/graphity/util/QueryBuilder.java
Martynas
Hey Uri,
I was just reading about concurrency in Jena, might be relevant for you as well:
http://jena.sourceforge.net/how-to/concurrency.html
Martynas
graphity.org
On Sun, Nov 11, 2012 at 1:01 PM, Uri Shani sh...@il.ibm.com wrote:
Is Jena thread-safe?
What would be the limitations on that
Hey all,
I'm having a little problem with a trade-off between ontology caching
and consistency.
I'm using JAX-RS resources with default per-request life-cycle (an
object is created for each request). Resource instance reads an
OntModel from ontology file using OntDocumentManager (caching turned
If Jena would be consistent in its HTTP handling and use an
established API such as JAX-RS, things could be much easier.
Martynas
graphity.org
On Thu, Dec 6, 2012 at 6:04 PM, Rob Vesse rve...@yarcdata.com wrote:
My two cents:
In my experience of writing a HTTP connector for Dydra for
) within
Linked Data -- what else do we need?
Martynas
On Thu, Dec 6, 2012 at 10:36 PM, Rob Vesse rve...@yarcdata.com wrote:
On 12/6/12 12:31 PM, Andy Seaborne a...@apache.org wrote:
On 06/12/12 20:03, Martynas Jusevičius wrote:
If Jena would be consistent in its HTTP handling and use
Olivier, what are you trying to achieve? Wouldn't QueryEngineHTTP help you here?
http://jena.apache.org/documentation/javadoc/arq/com/hp/hpl/jena/sparql/engine/http/QueryEngineHTTP.html
On Wed, Jan 9, 2013 at 2:22 PM, Olivier Rossel olivier.ros...@gmail.com wrote:
QueryExecutionFactory
Mark, ontologies usually have URIs, but Models don't (named graphs
come close, but that's in triplestores).
As Model is just a set of statements, there might be multiple
ontologies in one Model. You can list ontologies in OntModel:
Hey,
seems to me that a method to create an untyped Literal with language
tag is missing from ResourceFactory? I mean this form:
http://jena.apache.org/documentation/javadoc/jena/com/hp/hpl/jena/rdf/model/Model.html#createLiteral(java.lang.String,
java.lang.String)
Martynas
graphity.org
Rurik,
not sure what your use case is exactly, but I recently replaced Apache
with Varnish as the frontend for Tomcat. It seems to work fine, and
additionally you get HTTP cache. Maybe it could be useful:
https://www.varnish-cache.org
Martynas
graphity.org
On Thu, Feb 7, 2013 at 11:46 PM, Rurik
Stefan,
I presume you have to use N-Quads or TriX syntax to do this in one go
-- RDF/XML and Turtle do not support named graphs.
Alternatively you could import one graph at a time?
Martynas
graphity.org
On Thu, Feb 14, 2013 at 9:29 AM, Stefan Scheffler
sscheff...@avantgarde-labs.de wrote:
Hey,
how can I switch off the inference rule debug messages like this one:
12:37:13,406 DEBUG FBRuleInfGraph:264 - Adding rule [ (?x
http://spinrdf.org/sp#variable ?y) - (?x rdf:type
http://spinrdf.org/sp#Bind) ]
I'm using Jena 2.7.2. I tried this in log4j.properties but it doesn't
seem to
at 1:49 PM, Martynas Jusevičius
marty...@graphity.org wrote:
Hey,
I'm running SPARQL queries on endpoints with HTTP Basic
authentication, and am looking for a convenient way to manage and
configure the credentials.
Currently I've implemented a simple registry that checks endpoint URIs
have moved on since then. How do things stand relative to Jena
2.10.0?
On 26/02/13 13:45, Martynas Jusevičius wrote:
I extended QueryEngineHTTP to achieve what I had described:
https://raw.github.com/Graphity/graphity-ldp/rf-input-mode/src/main/java/org/graphity/ldp/query/QueryEngineHTTP.java
Vegard,
have you looked at SPIN constraints?
http://spinrdf.org/spin.html#spin-constraints
http://semwebquality.org/ontologies/dq-constraints
Martynas
graphity.org
On Tue, Mar 5, 2013 at 10:20 AM, Vegard Vaage vegard.va...@tv2.no wrote:
Hi!
I'm trying to verify instance data against an
Claude,
SPARQL endpoint implementation in Graphity Linked Data server can
proxy another endpoint, or serve a local Model. It can be accessed via
HTTP or directly through JAX-RS object methods:
Hey all,
QueryEngineHTTP does not implement setInitialBindings() due to Jena's
implementation specifics, as I found out a while ago:
http://mail-archives.apache.org/mod_mbox/jena-users/201201.mbox/%3c4f11b03e.7040...@apache.org%3E
However, this lack of uniformity prevents generic code that
be to inject a VALUES clause into the query though
there may be some issues with scoping and collision with existing VALUES
clauses
Feel free to open a JIRA
Rob
On 4/3/13 9:21 AM, Martynas Jusevičius marty...@graphity.org wrote:
Hey all,
QueryEngineHTTP does not implement
Hey,
with such query string
SELECT * { ?s ?p ?o } ORDER BY ASC(STR(?o))
passed into QueryFactory.create() and calling toString() on the Query
object, what I get back is:
SELECT *
WHERE
{ ?s ?p ?o }
ORDER BY ASCstr(?o)
where ASC is missing parentheses . DESC() doesn't have this
BTW, I'm using Jena 2.7.2 / ARQ 2.9.2.
On Tue, May 7, 2013 at 9:34 PM, Martynas Jusevičius
marty...@graphity.org wrote:
Hey,
with such query string
SELECT * { ?s ?p ?o } ORDER BY ASC(STR(?o))
passed into QueryFactory.create() and calling toString() on the Query
object, what I get back
Hey,
Jena uses a pattern to define static Logger objects that I have adopted:
private static Logger log = LoggerFactory.getLogger(FileManager.class) ;
However some online material indicates this pattern as a possible
source of memory leaks, especially when the application is deployed in
a
Hey Matias,
I'm using SPIN API in Graphity Linked Data platform. Here's an example
of a SPIN-based SPARQL QueryBuilder:
https://github.com/Graphity/graphity-browser/blob/master/src/main/java/org/graphity/processor/query/QueryBuilder.java
I'm also planning to use SPIN constraints to validate
it on startup, I'm trying to find an example now.
On Wed, May 29, 2013 at 11:44 AM, Martynas Jusevičius marty...@graphity.org
wrote:
Hey Matias,
I'm using SPIN API in Graphity Linked Data platform. Here's an example
of a SPIN-based SPARQL QueryBuilder:
https://github.com/Graphity/graphity-browser
Rob, as a sidenote for this thread and some previous ones about
uniform HTTP access in Jena, I wanted to show how easily
authentication can be done using Jersey (implementation of JAX-RS).
This is from Graphity subclass of UpdateProcessRemote:
@Override
public void execute()
{
Hey,
I know changes were introduced (and bugs fixed) in this area, but I'm
having trouble getting update requests to work with HTTP Basic
authentication.
This code should send authenticated INSERT to Dydra:
UpdateRequest update = UpdateFactory.create(uString);
Luis,
not directly related to Fuseki, but you could implement a custom GS
using JAX-RS interfaces from Graphity:
https://github.com/Graphity/graphity-ldp/blob/master/src/main/java/org/graphity/server/model/GraphStore.java
There is also a Jena-compatible implementation that functions as a
proxy
Also consider SPIN from TopQuadrant. SPIN can represent SPARQL as RDF.
There is a vocabulary and API:
http://spinrdf.org/spin.html
http://topbraid.org/spin/api/
Martynas
graphityhq.com
On Fri, Aug 2, 2013 at 10:55 AM, Amin beyranvand amin_2...@yahoo.com wrote:
Hi
I want to write an engine
Where uniqueness is more important than readability, I would go with UUIDs.
On Thu, Aug 15, 2013 at 2:03 AM, David Moss admo...@gmail.com wrote:
This is a fairly basic question, but how do others go about naming entities
in an RDF graph?
The semantic web evangelists are keen on URIs that
No, URIs are absolute in RDF model, even though they can be relative
in serializations.
Why don't you use base URI (@base in Turtle) and/or prefixes so that
URIs stay stable no matter where you load the file from?
Martynas
On Thu, Aug 15, 2013 at 5:39 PM, Norman Walsh n...@nwalsh.com wrote:
...@nwalsh.com wrote:
Martynas Jusevičius marty...@graphity.org writes:
No, URIs are absolute in RDF model, even though they can be relative
in serializations.
Why don't you use base URI (@base in Turtle) and/or prefixes so that
URIs stay stable no matter where you load the file from?
It's
I've developed a basic XSLT 2.0 stylesheet transforming Jena's RDF/XML
into simple JSON-LD:
https://github.com/Graphity/graphity-browser/blob/master/src/main/resources/org/graphity/client/writer/rdfxml2json-ld.xsl
Graphity's JSONLDWriter can be used as a MessageBodyWriterModel
provider in a
Does November ever have 31 days?
On Thu, Sep 12, 2013 at 12:47 PM, Julien Plu
julien@redaction-developpez.com wrote:
Hi,
I use Jena 2.10.1 to compute the age of people from french DBpedia dataset.
When I retrieve a date, sometimes, this code date.getValue(), where
date is a Literal,
Hey,
I'm using DatasetAdapter to access a Graph Store. It seems to me
however that it is not properly escaping graph URI when building the
request URI.
4.2 Indirect Graph Identification
(http://www.w3.org/TR/sparql11-http-rdf-update/#indirect-graph-identification)
gives an example of encoded
This is probably the correct encoded value (including slashes etc):
http%3A%2F%2Flocalhost%3A8080%2Fgraphs%2F2013%2520Danfoss%2520MPHE.xlsx
On Fri, Sep 13, 2013 at 1:35 PM, Martynas Jusevičius
marty...@graphity.org wrote:
Hey,
I'm using DatasetAdapter to access a Graph Store. It seems to me
AM, Andy Seaborne a...@apache.org wrote:
Version? IIRC there was a fix around here not so long ago.
On 13/09/13 12:41, Martynas Jusevičius wrote:
This is probably the correct encoded value (including slashes etc):
http%3A%2F%2Flocalhost%3A8080%2Fgraphs%2F2013%2520Danfoss%2520MPHE.xlsx
http%3A
Ok, I found it and the new target(Node name) method seems to do the trick:
https://svn.apache.org/repos/asf/jena/trunk/jena-arq/src/main/java/org/apache/jena/web/DatasetGraphAccessorHTTP.java
On Sat, Sep 14, 2013 at 1:49 PM, Martynas Jusevičius
marty...@graphity.org wrote:
Sorry about
Charles,
you can try Graphity for UI building:
https://github.com/Graphity/graphity-browser
It transforms RDF/XML to (X)HTML using modular XSLT templates, and
includes default generic layout as well as specialized stylehseets for
vocabularies such as GoodRelations (which should be useful for
Hey,
I want to do federation between to endpoints, both of which contain
named graphs. I'm trying a query of this shape:
PREFIX foaf: http://xmlns.com/foaf/0.1/
PREFIX acl: http://www.w3.org/ns/auth/acl#
SELECT *
WHERE
{ GRAPH
Hey,
one of Graphity users has configured it with Sesame SPARQL endpoint,
but he gets an NPE in ARQ code:
11:15:54,198 DEBUG DataManager:98 - Remote service
http://localhost:8080/openrdf-workbench/repositories/odn/query Query:
DESCRIBE ?instance http://192.168.122.30:8080/graphity-browser/
WHERE
What you want can be done on the syntactic XML level using entities:
rdf:type rdf:resource=rdfs;Resource/
This would require a local entity definition however:
!DOCTYPE rdf:RDF [
!ENTITY rdfs http://www.w3.org/2000/01/rdf-schema#;
]
I don't think it can be done using qualified names as
Hey,
I have datetime components as 3 separate literals, with xsd:gYear,
xsd:gMonth, xsd:gDay respective datatypes. Not all mandatory - the
format can be , -MM, -MM-DD.
Now how do I combine those into a single xsd:dateTime Literal? A
concrete use case would be converting
, you can then use
createTypedLiteral(String lex, RDFDatatype dtype)
Not all mandatory - the
format can be , -MM, -MM-DD.
You could build the lexical form.
Andy
On 14/11/13 02:02, Martynas Jusevičius wrote:
Hey,
I have datetime components as 3 separate literals
OK I was probably too quick - now I realized the syntax of xsd:gMonth
and xsd:gDay is not so simple...
On Thu, Nov 14, 2013 at 4:05 PM, Martynas Jusevičius
marty...@graphity.org wrote:
I came up with an approach that concatenates lexical values and
doesn't need Calendar or DateTimeStruct
, Andy Seaborne a...@apache.org wrote:
On 14/11/13 16:42, Martynas Jusevičius wrote:
OK I was probably too quick - now I realized the syntax of xsd:gMonth
and xsd:gDay is not so simple...
:-)
http://www.w3.org/TR/xmlschema11-2/#dateTime for details.
The range of time:month is a non
BTW, there seems to be a related question on StackOverflow:
http://answers.semanticweb.com/questions/610/ordering-by-time-in-sparql-query
I might just give up building an xsd:dateTime and use separate
year/month/day components.
On Thu, Nov 14, 2013 at 7:26 PM, Martynas Jusevičius
marty
:
On 14/11/13 18:29, Martynas Jusevičius wrote:
BTW, there seems to be a related question on StackOverflow:
http://answers.semanticweb.com/questions/610/ordering-by-time-in-sparql-query
I might just give up building an xsd:dateTime and use separate
year/month/day components.
On Thu, Nov 14
This might happen if the Resource object has been created using
ResourceFactory.createResource(), in which case its getModel() returns
null.
Martynas
graphityhq.com
On Thu, Dec 5, 2013 at 2:44 PM, Dibyanshu Jaiswal djthequ...@gmail.com wrote:
Hi!
I using JenaParliament for spatial queries.
Hey,
I'm using constants from org.openjena.riot.WebContent, such as
WebContent.contentTypeRDFXML, WebContent.langRDFXML etc.
After upgrading to Jena 2.11.0 (as part of SPIN API 1.3.1), the
WebContent class is not there anymore. What can I use instead?
Thanks.
Martynas
(WebContent.contentTypeTurtle, WebContent.langTurtle);
// snip
}
Martynas
On Thu, Dec 5, 2013 at 11:45 PM, Martynas Jusevičius
marty...@graphity.org wrote:
Hey,
I'm using constants from org.openjena.riot.WebContent, such as
WebContent.contentTypeRDFXML, WebContent.langRDFXML etc.
After
)
and use constants not Strings.
Andy
On 05/12/13 22:57, Martynas Jusevičius wrote:
Or rather, what functionality can replace langFromContentType() that I
was using to convert media type to Jena syntax name:
String syntax = langFromContentType(in.getMimeType
Miguel,
not exactly sure, but maybe SPIN rules could help you?
http://spinrdf.org/spin.html#spin-rules
Martynas
On Fri, Dec 6, 2013 at 1:20 AM, Miguel Bento Alves
mbentoal...@gmail.com wrote:
Is it possible call a Sparql command in a rule? Can we do that with a custom
built-in function?
An
if RDFLanguages.contentTypeToLang() returns null before calling
read()/write().
On Fri, Dec 6, 2013 at 1:39 PM, Andy Seaborne a...@apache.org wrote:
On 06/12/13 12:08, Martynas Jusevičius wrote:
Thanks Andy. Yes looks like I have some upgrading to do...
Can you provide more info about that FileManager adapter
Hey,
I've upgraded to Jena 2.11.0 as part of SPIN API 1.3.1. As a result,
previously working RDF/XML output breaks:
com.hp.hpl.jena.shared.BadURIException: Only well-formed absolute
URIrefs can be included in RDF/XML output: # Code:
57/REQUIRED_COMPONENT_MISSING in SCHEME: A component that is
Hey,
after upgrade to 2.11.0 I get this exception during Graph Store
Protocol request:
org.apache.jena.atlas.web.HttpException: 411 - Length Required
org.apache.jena.riot.web.HttpOp.exec(HttpOp.java:1020)
org.apache.jena.riot.web.HttpOp.execHttpPost(HttpOp.java:633)
wrote:
On 10/12/13 14:33, Martynas Jusevičius wrote:
Hey,
after upgrade to 2.11.0 I get this exception during Graph Store
Protocol request:
org.apache.jena.atlas.web.HttpException: 411 - Length Required
org.apache.jena.riot.web.HttpOp.exec(HttpOp.java:1020
Andy,
speaking of nginx - maybe you happen to know if is possible to limit
request content size without a Content-Length header?
Martynas
On Tue, Dec 10, 2013 at 6:53 PM, Andy Seaborne a...@apache.org wrote:
On 10/12/13 16:26, Martynas Jusevičius wrote:
I'm upgrading from an old version
Hey,
is there a way to build a SPARQL-specific regex string in Jena?
Now I'm using the Pattern class to implement simple regex() based
search. If the search string contains special characters, escaping is
done but the syntax does not seem to work.
For example,
/#grammarEscapes
On Tue, Jan 21, 2014 at 1:59 AM, Joshua TAYLOR joshuaaa...@gmail.com wrote:
On Mon, Jan 20, 2014 at 7:30 PM, Martynas Jusevičius
marty...@graphity.org wrote:
For example, Pattern.compile(Pattern.quote(+35)) produces query with
FILTER regex(str(?label), \\Q+35\\E, i)
which returns
= ... + filter(regex(...,\+35\) + ...;
Sorry for the hasty and inaccurate reply.
On Mon, Jan 20, 2014 at 9:27 PM, Joshua TAYLOR joshuaaa...@gmail.com
wrote:
On Mon, Jan 20, 2014 at 8:48 PM, Martynas Jusevičius
marty...@graphity.org wrote:
OK maybe +35 was a bad example. But isn't + a special
Thanks Andy. REUtil.quoteMeta() seems to do the trick.
On Tue, Jan 21, 2014 at 6:22 PM, Andy Seaborne a...@apache.org wrote:
On 21/01/14 16:58, Martynas Jusevičius wrote:
Andy,
what if I'm sending the query to a remote endpoint that does not
support Java style regex syntax? Do I need to use
Frederic, are you sure this hasn't been done before? I've used
JenaBean [1], but I know there are at least several other similar
projects.
Martynas
[1] https://code.google.com/p/jenabean/
On Wed, Jan 29, 2014 at 2:58 PM, Frederic Toublanc
frederic.toubl...@telemis.com wrote:
Ok thx a lot :)
One option is to do post-processing with XSLT. Here's a stylesheet
that groups and sorts resource descriptions and properties within
them:
https://github.com/Graphity/graphity-browser/blob/master/src/main/webapp/static/org/graphity/client/xsl/group-sort-triples.xsl
Martynas
graphityhq.com
On
Will, check DatasetAdapter:
http://jena.apache.org/documentation/javadoc/arq/org/apache/jena/web/DatasetAdapter.html
Martynas
On Mon, Feb 10, 2014 at 12:52 AM, Will william_gree...@hotmail.com wrote:
Hi,
I am writing some Groovy extensions for Jena, but am struggling to find
anything about
Mark,
if you are using DESCRIBE or CONSTRUCT queries then the result you get
is a Model. And a model is a set of statements which is not ordered.
You can do post-processing to sort them the way you want, e.g. when
you are presenting data to the user.
Martynas
On Thu, Feb 27, 2014 at 2:29 PM,
On Thu, 27 Feb 2014 14:34:49 +0100
Martynas Jusevičius marty...@graphity.org wrote:
Mark,
if you are using DESCRIBE or CONSTRUCT queries then the result you get
is a Model. And a model is a set of statements which is not ordered.
You can do post-processing to sort them the way you want, e.g. when
Jose, sorry can't help with your question - just wanted to let you know that
FILTER (?actor IN (http://data.linkedmdb.org/resource/actor/30711, ...))
is a shorter version of the same expression, in case you were not aware:
http://www.w3.org/TR/sparql11-query/#func-in
Are you implementing
Hey,
have you tried D2RQ? http://d2rq.org
Martynas
On Sun, Mar 30, 2014 at 11:37 AM, Kamalraj Jairam
kjai...@semanticsoftware.com.au wrote:
Hello All,
Whats the best way to convert sparql to SQL using R2RML mappings
and convert resultset from DB to RDF?
Thanks
--
Kjairam
Sent with
There are also commercial options, e.g. this:
http://www.revelytix.com/content/spyder
On Sun, Mar 30, 2014 at 10:15 PM, Kamalraj Jairam
kjai...@semanticsoftware.com.au wrote:
Hello Paul,
These are the informtion i have
1) R2RML mapping for existing DB
2) I have some fedreated queries which
Mohammad,
I think Ordnance Survey Linked Data is a good example that it can:
http://data.ordnancesurvey.co.uk
Martynas
On Fri, Apr 18, 2014 at 12:09 PM, Mohammad Hailmizan Bin Jafar
hailmizan.ja...@egc.gov.bn wrote:
I would like to build e-govt service application (e-services) such as Land
David,
Using Jena as Maven dependencies is much easier.
Martynas
On Apr 26, 2014 9:32 AM, David Moss admo...@gmail.com wrote:
Jena libraries in Netbeans
Saturday, 26 April 2014
12:38 PM
Adding Jena to Netbeans was interesting. Lots of trial and error. There
were tutorials on how to
Hey Cindy,
Check SPIN constraints:
http://spinrdf.org/spin.html#spin-constraints
Martynas
graphityhq.com
On Apr 27, 2014 1:41 PM, Cindy A McMullen cindy.mcmul...@oracle.com
wrote:
Hi -
Is there a way to check the consistency of triples with one's ontology
prior to insertion into the graph?
Hey,
is this possible? Or is there a workaround?
I need XMLLiteral as embedded XML (actually XHTML) regardless if it's
canonical or not, otherwise XSLT processing breaks. I've tuned the
XHTML quite sucessfully, but still there are some large literals
failing, even though they look canonical to
I would be willing to fix the XHTML as well, but I haven't found a way
to identify exactly what causes the problem.
I'm attaching the file, maybe that helps.
On Wed, Jun 25, 2014 at 9:41 PM, Martynas Jusevičius
marty...@graphity.org wrote:
Hey,
is this possible? Or is there a workaround?
I
Hey,
are there any examples on how to assemble a Dataset, with files
becoming (possibly renamed) named graphs? Or maybe assembler is not
the right tool for this?
I checked the how-to but it's mostly about Models.
https://jena.apache.org/documentation/assembler/assembler-howto.html
Martynas
Hey,
is it possible to check if resource in OntModel comes from the
main/root ontology or the owl:imports?
Is thought that is what isInBaseModel() does, but I don't get expected result.
On Tue, Aug 26, 2014 at 9:57 AM, Dave Reynolds
dave.e.reyno...@gmail.com wrote:
On 26/08/14 02:10, Martynas Jusevičius wrote:
Hey,
is it possible to check if resource in OntModel comes from the
main/root ontology or the owl:imports?
Is thought that is what isInBaseModel() does, but I don't get
couldn't see any openDataset()
or similar methods that would return the assembled Dataset?
Martynas
On Sun, Aug 24, 2014 at 3:12 PM, Andy Seaborne a...@apache.org wrote:
On 23/08/14 23:43, Martynas Jusevičius wrote:
Hey,
are there any examples on how to assemble a Dataset, with files
becoming
Hey,
could the logging level of this class be reduced to TRACE?
Right now it is DEBUG and produces a lot of quite cryptic output.
Martynas
Hey,
can someone explain to me why the following query returns no results:
PREFIX dct: http://purl.org/dc/terms/
PREFIX gr: http://purl.org/goodrelations/v1#
PREFIX skos: http://www.w3.org/2004/02/skos/core#
SELECT *
WHERE {
?this a gr:ProductOrServiceModel .
FILTER NOT EXISTS {
a skos:Concept
}
}
On Mon, Sep 29, 2014 at 2:15 PM, Martynas Jusevičius
marty...@graphity.org wrote:
Hey,
can someone explain to me why the following query returns no results:
PREFIX dct: http://purl.org/dc/terms/
PREFIX gr: http://purl.org/goodrelations/v1#
PREFIX skos: http://www.w3.org
Thanks Andy!
On Sep 29, 2014 10:22 PM, Andy Seaborne a...@apache.org wrote:
On 29/09/14 12:56, Martynas Jusevičius wrote:
OK, I realize now the valid ?subject was still matching the FILTER
pattern.
I guess what I need here is MINUS:
PREFIX dct: http://purl.org/dc/terms/
PREFIX gr: http
Benjamin,
Regarding creation of RDF from SQL (relational databases), take a look at D2RQ:
http://d2rq.org
You can define a declarative mapping and pass it to D2RQ. In the ideal
case you won't even have to touch Java.
Martynas
On Thu, Oct 9, 2014 at 11:02 PM, Benjamin Eckstein umi...@gmail.com
PM, Hammond, Tony
tony.hamm...@macmillan.com wrote:
Hi Martynas:
As said:
The basic RDF/XML output from Jena is not what we need. We just need a
better, more regular, RDF/XML-ABBREV such as the rapper output.
Cheers,
Tony
On 17/11/2014 14:35, Martynas Jusevičius marty...@graphity.org
David,
in my experience this approach only gives you the object-model
impedance mismatch and no real advantages.
Have you considered working directly on Jena Models and Resources?
Martynas
graphityhq.com
On Thu, Nov 20, 2014 at 11:13 PM, David Moss admo...@gmail.com wrote:
Until now I have
Hey,
I need to implement Sesame HTTP protocol for remotely parameterized queries:
http://rdf4j.org/sesame/2.7/docs/system.docbook?view#repository-queries
My plan is to pass QuerySolutionMap to the QueryEngineHTTP level which
then would encode the values as N-Triples and add them to the query
pass the
parameters remotely, then this step is avoided.
On Fri, Jan 23, 2015 at 9:22 PM, Andy Seaborne a...@apache.org wrote:
On 23/01/15 19:52, Martynas Jusevičius wrote:
Hey,
I need to implement Sesame HTTP protocol for remotely parameterized
queries:
http://rdf4j.org/sesame/2.7/docs
I think an even shorter version should work, as most Resource methods
follow the builder pattern:
negativePropertyAssertion.addProperty(OWL2.assertionProperty, hasPropertyR).
addProperty(OWL2.sourceIndividual, sourceIndividual).
addProperty(OWL2.targetIndividual,
Hey,
I have some code that adds query parameters to SPARQL Protocol requests.
According to my quick research, the final HTTP query string depends on
com.hp.hpl.jena.sparql.engine.http.Params.httpString():
public String httpString()
{
StringBuffer sbuff = new StringBuffer() ;
HTTP error code 403 means the client does not have access to the
requested resource:
http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.4
On Thu, Jan 29, 2015 at 2:57 AM, Trevor Donaldson tmdona...@gmail.com wrote:
Trying to use DatasetAccessor. I am getting the following error.
Is there some code that can build the VALUES part from QuerySolutionMap?
On Fri, Jan 23, 2015 at 9:22 PM, Andy Seaborne a...@apache.org wrote:
On 23/01/15 19:52, Martynas Jusevičius wrote:
Hey,
I need to implement Sesame HTTP protocol for remotely parameterized
queries:
http://rdf4j.org
Nicolas,
I suggest you also take a look at Graphity Client:
https://github.com/Graphity/graphity-client
You don't really need an object layer representing your RDF classes
above Jena, it is a bottleneck. You can express both the webapp
structure and the instance data as RDF, and define a mapping
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.
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