Description
Issue still valid?
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Not sure what you want me to validate here. You can validate the issue using the "execute query" link below.
Source
Where did you find the data issue? Pick one, remove the others.
Web / SPARQL
State the service (e.g. http://dbpedia.org/sparql) and the SPARQL query
give a link to the web / linked data pages (e.g. http://dbpedia.org/resource/Berlin)
Here is a link to reproduce the issue: execute query.
Error Description
Please state the nature of your technical emergency:
The query returns a literal tagged as a langString, but it does not include a language.
<sparql xmlns="http://www.w3.org/2005/sparql-results#" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.w3.org/2001/sw/DataAccess/rf1/result2.xsd">
<head>
<variable name="lc"/>
<variable name="subj"/>
</head>
<results distinct="false" ordered="true">
<result>
<binding name="lc"><literal xml:lang="de">Altin Lala</literal></binding>
<binding name="subj"><uri>http://de.dbpedia.org/resource/Altin_Lala</uri></binding>
</result>
<result>
<binding name="lc"><literal xml:lang="de">Hans Lala</literal></binding>
<binding name="subj"><uri>http://de.dbpedia.org/resource/Hans_Lala</uri></binding>
</result>
<result>
<binding name="lc"><literal xml:lang="de">Maharan Lala</literal></binding>
<binding name="subj"><uri>http://de.dbpedia.org/resource/Maharan_Lala</uri></binding>
</result>
<result>
<binding name="lc"><literal xml:lang="de">Jiri Lala</literal></binding>
<binding name="subj"><uri>http://de.dbpedia.org/resource/Jiri_Lala</uri></binding>
</result>
<result>
<binding name="lc"><literal xml:lang="de">Jan Lala</literal></binding>
<binding name="subj"><uri>http://de.dbpedia.org/resource/Jan_Lala</uri></binding>
</result>
<result>
<binding name="lc"><literal datatype="http://www.w3.org/1999/02/22-rdf-syntax-ns#langString">Hans Lala</literal></binding>
<binding name="subj"><uri>http://de.dbpedia.org/resource/Hans_Lala</uri></binding>
</result>
</results>
</sparql>
This is invalid according to the RDF specs. (Ref: eclipse-rdf4j/rdf4j#2815)
Just for info from the RDF 1.1 spec:
"if and only if the datatype IRI is http://www.w3.org/1999/02/22-rdf-syntax-ns#langString, a non-empty language tag as defined by [BCP47]. The language tag must be well-formed according to section 2.2.9 of [BCP47]."
https://www.w3.org/TR/rdf11-concepts/#section-Graph-Literal
Error specification
Pick the appropriate:
I would guess that omitting the datatype or changing it to string should probably work.
- Expected / corrected RDF outcome snippet (NTRIPLES):
<result> <binding name="lc"><literal>Hans Lala</literal></binding> <binding name="subj"><uri>http://de.dbpedia.org/resource/Hans_Lala</uri></binding> </result>