Re: CMS diff: ARQ - Building Queries Programmatically
Committed, thank you A. Wilke! ajs6f > On May 5, 2019, at 9:26 AM, A. Wilke wrote: > > Clone URL (Committers only): > https://cms.apache.org/redirect?new=anonymous;action=diff;uri=http://jena.apache.org/documentation%2Fquery%2Fprogrammatic.mdtext > > A. Wilke > > Index: trunk/content/documentation/query/programmatic.mdtext > === > --- trunk/content/documentation/query/programmatic.mdtext (revision > 1858626) > +++ trunk/content/documentation/query/programmatic.mdtext (working copy) > @@ -8,6 +8,10 @@ > See the examples in the ARQ `src-examples/` directory of the ARQ > distribution, particularly `arq.examples.AlgebraExec`. > > +* [src-examples at > gitbox.apache.org](https://gitbox.apache.org/repos/asf?p=jena.git;a=tree;f=jena-arq/src-examples) > +* [src-examples at > github.com](https://github.com/apache/jena/tree/master/jena-arq/src-examples) > + > + > See also [ARQ - SPARQL Algebra](algebra.html) > > >
[jira] [Commented] (JENA-1693) Add Aggregate Function MEDIAN To SPARQL ARQ Syntax
[
https://issues.apache.org/jira/browse/JENA-1693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16837416#comment-16837416
]
A. Soroka commented on JENA-1693:
-
I'd be very happy to help you with a PR.
> Add Aggregate Function MEDIAN To SPARQL ARQ Syntax
> --
>
> Key: JENA-1693
> URL: https://issues.apache.org/jira/browse/JENA-1693
> Project: Apache Jena
> Issue Type: New Feature
> Environment: general
>
>Reporter: Marco Neumann
>Priority: Minor
> Labels: features
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> As briefly mentioned to Andy Seaborne I'd like to see the aggregate function
> MEDIAN in the ARQ SPARQL syntax.
> "Median is the value that separates lower half from the higher half when the
> values are ordered in ascending or descending order. It is the middle value
> in a given dataset. Medians are helpful in understanding the distribution of
> data. This can be done by comparing mean and median values. By observing the
> difference between these values we can understand whether the data is left
> skewed or right skewed. The formula for median is: Median = ((n + 1)/2) th
> number in the series where the numbers are ordered. Here, n denotes the
> number of values for the given variable."
> DIVYA SPANDANA MARNEN, SPARQL-R: EXTENDED SPARQL FOR STATISTICAL COMPUTATIONS.
>
> example
>
> SELECT agg:median(?age) AS ?median
> WHERE
> { ?x ex:age ?age }
>
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
[jira] [Commented] (JENA-1710) Wrong turtle serialization of RDFList with itself inside
[
https://issues.apache.org/jira/browse/JENA-1710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16837058#comment-16837058
]
Andy Seaborne commented on JENA-1710:
-
[~szz] - thanks for the report and test case.
The indirect cycle is confusing the pretty printer. Directly including a list
in itself is handled but the indirect, through owl:unionOf isn't handled.
Because that is potentially an arbitrary chain of properties, it is difficult
to see an immediate fix.
Using {{RDFData.write}} and formats {{RDFFormat.TURTLE_BLOCKS}} or
{{RDFFormat.TURTLE_FLAT}} work - they don't do any list formatting.
The other workaround, especially for OWL class definitions, is "don't do that!".
> Wrong turtle serialization of RDFList with itself inside
>
>
> Key: JENA-1710
> URL: https://issues.apache.org/jira/browse/JENA-1710
> Project: Apache Jena
> Issue Type: Bug
> Components: Base, Jena, RIOT
>Affects Versions: Jena 3.9.0, Jena 3.10.0, Jena 3.11.0
> Environment: jena-arq-3.11.0, java8
>Reporter: ssz
>Priority: Minor
>
> Testcase:
> {quote}Model m = ModelFactory.createDefaultModel();
> Resource b0 = m.createResource();
> Resource b1 = m.createResource();
> {color:#808080}// add 4 statements:{color}
> b0.addProperty(OWL.{color:#660e7a}unionOf{color},
> b1).addProperty(RDF.{color:#660e7a}type{color},
> OWL.{color:#660e7a}Class{color});
> b1.addProperty(RDF.{color:#660e7a}first{color},
> b0).addProperty(RDF.{color:#660e7a}rest{color},
> RDF.{color:#660e7a}nil{color});
> m.write(System.{color:#660e7a}out{color}, {color:#008000}"ttl"{color});
> m.write(System.{color:#660e7a}out{color}, {color:#008000}"nt"{color});
> {quote}
> Output:
> {quote}_:b0 <[http://www.w3.org/1999/02/22-rdf-syntax-ns#first]>
> _:b1 ;
> <[http://www.w3.org/1999/02/22-rdf-syntax-ns#rest]>
> () .
> _:B40396d1bX2D68d6X2D40b4X2DbbcdX2Dbe185973bfc1
> <[http://www.w3.org/1999/02/22-rdf-syntax-ns#rest]>
> <[http://www.w3.org/1999/02/22-rdf-syntax-ns#nil]> .
> _:B40396d1bX2D68d6X2D40b4X2DbbcdX2Dbe185973bfc1
> <[http://www.w3.org/1999/02/22-rdf-syntax-ns#first]>
> _:B4da6d814X2Ddb64X2D4ff1X2Da5d4X2D4f71d5718fd9 .
> _:B4da6d814X2Ddb64X2D4ff1X2Da5d4X2D4f71d5718fd9
> <[http://www.w3.org/1999/02/22-rdf-syntax-ns#type]>
> <[http://www.w3.org/2002/07/owl#Class]> .
> _:B4da6d814X2Ddb64X2D4ff1X2Da5d4X2D4f71d5718fd9
> <[http://www.w3.org/2002/07/owl#unionOf]>
> _:B40396d1bX2D68d6X2D40b4X2DbbcdX2Dbe185973bfc1 .
> {quote}
>
> So in turtle there are only 2 triples, while expected 4.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
