[
https://issues.apache.org/jira/browse/JENA-1744?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andy Seaborne updated JENA-1744:
--------------------------------
Description:
Example Turtle file, no prefixes:
{noformat}
<http://somewhere/s1> <http://example/ns/(prop1)> "prop 1" .
<http://somewhere/s2> <http://example/ns/(prop2)> "prop 2" .
{noformat}
produces ({{riot --pretty JSONLD D.ttl}}) the JSON LD
{noformat}
{
"@graph" : [ {
"@id" : "http://somewhere/s1";,
"http://example/ns/(prop1)" : "prop 1"
}, {
"@id" : "http://somewhere/s2";,
"" : "prop 2"
} ],
"@context" : {
"" : {
"@id" : "http://example/ns/(prop2)"
}
}
}
{noformat}
which parses back to to the original RDF triples correctly.
However, the treatment of the two properties is asymmetric - one is context ""
and one is full URI as "http://example/ns/(prop1)".
This can create problems downstream if the JSON-LD is treated as JSON (the
motivating case is ingesting extracted RDF data into a BI-tool via it's JSON
adapter).
The [JSONLD writer (line
321)|https://github.com/apache/jena/blob/0dde76f777e55109a75db87c855bfc17e40c9d4a/jena-arq/src/main/java/org/apache/jena/riot/writer/JsonLDWriter.java#L321]
uses "{{p.getLocalName()}}" to choose JSON-LD field name. In both cases, it is
"" because "()" are legal in a URI but not legal for an RDF qname localname.
The XML-split is the pair (full-URI, "").
JSON-LD does not need the restrictions need for RDF/XML. The split can be made
at the "/". JSON-LD uses [curies|https://www.w3.org/TR/curie/].
was:
Example Turtle file, no prefixes:
{noformat}
<http://somewhere/s1> <http://example/ns/(prop1)> "prop 1" .
<http://somewhere/s2> <http://example/ns/(prop2)> "prop 2" .
{noformat}
produces ({{riot --pretty JSONLD D.ttl}}) the JSON LD
{noformat}
{
"@graph" : [ {
"@id" : "http://somewhere/s1";,
"http://example/ns/(prop1)" : "prop 1"
}, {
"@id" : "http://somewhere/s2";,
"" : "prop 2"
} ],
"@context" : {
"" : {
"@id" : "http://example/ns/(prop2)"
}
}
}
{noformat}
which parses back to to the original RDF triples correctly.
However, the treatment of the two properties is asymmetric - one is context ""
and one is full URI as "http://example/ns/(prop1)".
This can creat problems downstream if the JSON-LD is treated as JSON (the
motivating case is ingesting into a BI-tool via it's JSON adapter).
This is because the [JSONLD writer (line
321)|https://github.com/apache/jena/blob/0dde76f777e55109a75db87c855bfc17e40c9d4a/jena-arq/src/main/java/org/apache/jena/riot/writer/JsonLDWriter.java#L321]
uses "{{p.getLocalName()}}" to choose JSON-LD field name. In both cases it is
"" because "()" are legal in a URI but not legal for an RDF qname localname.
The XML-split is (full-URI, "").
> JSON-LD writing handles non-qname property URI badly.
> -----------------------------------------------------
>
> Key: JENA-1744
> URL: https://issues.apache.org/jira/browse/JENA-1744
> Project: Apache Jena
> Issue Type: Improvement
> Components: RIOT
> Affects Versions: Jena 3.12.0
> Reporter: Andy Seaborne
> Assignee: Andy Seaborne
> Priority: Major
>
> Example Turtle file, no prefixes:
> {noformat}
> <http://somewhere/s1> <http://example/ns/(prop1)> "prop 1" .
> <http://somewhere/s2> <http://example/ns/(prop2)> "prop 2" .
> {noformat}
> produces ({{riot --pretty JSONLD D.ttl}}) the JSON LD
> {noformat}
> {
> "@graph" : [ {
> "@id" : "http://somewhere/s1";,
> "http://example/ns/(prop1)" : "prop 1"
> }, {
> "@id" : "http://somewhere/s2";,
> "" : "prop 2"
> } ],
> "@context" : {
> "" : {
> "@id" : "http://example/ns/(prop2)"
> }
> }
> }
> {noformat}
> which parses back to to the original RDF triples correctly.
> However, the treatment of the two properties is asymmetric - one is context
> "" and one is full URI as "http://example/ns/(prop1)".
> This can create problems downstream if the JSON-LD is treated as JSON (the
> motivating case is ingesting extracted RDF data into a BI-tool via it's JSON
> adapter).
> The [JSONLD writer (line
> 321)|https://github.com/apache/jena/blob/0dde76f777e55109a75db87c855bfc17e40c9d4a/jena-arq/src/main/java/org/apache/jena/riot/writer/JsonLDWriter.java#L321]
> uses "{{p.getLocalName()}}" to choose JSON-LD field name. In both cases, it
> is "" because "()" are legal in a URI but not legal for an RDF qname
> localname. The XML-split is the pair (full-URI, "").
> JSON-LD does not need the restrictions need for RDF/XML. The split can be
> made at the "/". JSON-LD uses [curies|https://www.w3.org/TR/curie/].
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