This is another not-an-issue question but sent to JIRA. It is not a bug,
it is a question about how to use Jena. It is also unanswerable because
of lack of detail.
It is also a stackoverflow question from yesterday.
This is the 3rd one in a week (one was actually about another system
anyway) calling something a bug that are really about how to use Jena.
Questions are not bugs.
Neither are they "urgent".
Often, the questioner does not respond and we get floating JIRA issues.
They aren't going to get answered on JIRA so I think we should quickly
close them for fear of getting swamped, referring to them to users@ e.g.
boiler plate like:
-------------
Hi there,
This is a question and is best sent to the Jena users mailing list.
[email protected].
You need to subscribe first, then respond to the verification email,
then send your question:
For details:
https://jena.apache.org/help_and_support/index.html
-------------
Andy
On 01/04/2020 10:01, David (Jira) wrote:
David created JENA-1876:
---------------------------
Summary: Parsing json-ld in Jena and type : rdfs:container does
not come through as a statement
Key: JENA-1876
URL: https://issues.apache.org/jira/browse/JENA-1876
Project: Apache Jena
Issue Type: Bug
Components: Base
Reporter: David
I have a jsonld file that I am parsing using Jena. The file has @type @id "rdfs:label"
and "rdfs:comment" and also ranges and domains. I have a test java program like this
Model m = ModelFactory.createDefaultModel();
{{ Reader fileReader = new FileReader(fileName);
Model model = m.read(fileReader, null, "JSON-LD");
StmtIterator it = model.listStatements();
Set<String> set = new HashSet<>();
System.out.println("Labels");
while (it.hasNext()) {
Statement statement = it.next();}}
.... It seems to pick up all the content but does not see the @type statements
with rdfs:container. How do I pick up these statements using this parser?
A fragment of the json-ld is \{ "@id": "aaa:bbb", "@type": [ "rdfs:container" ], "rdfs:label": { "@language": "en", "@value": "cccc" }, "rdfs:comment": \{
"@language": "en", "@value": "dddd." }, "rdfs:member": [ \{ "@id": "aaaa:eeee" }, \{ "@id": "aaaa:fffff" } ],
When the type is rdfs:class - I get a statement coming through with predicate "type" and
the object as the RDFClass, but when the type is rdfs:container - as in the above example I do not
get a statement through. I was expecting a statement to come through with the predicate of
"type" and a subject with localName of bbb and an object specifying the container class.
I do not see such a statement. How to I detect in the parser that the presence of the
rdfs:container? The presence of the container tag is very meaningful for our parser. We are looking
at alternative ways of representing this sort of information in the model because of this issue.
I notice Jena has the concept of Container :
[https://jena.apache.org/documentation/javadoc/jena/org/apache/jena/rdf/model/Container.html].
I can see write orientated methods that refer to this.
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