David created JENA-1876:
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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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