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https://issues.apache.org/jira/browse/JENA-281?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13418398#comment-13418398
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Rob Vesse commented on JENA-281:
--------------------------------
You didn't include a reference to the Turtle spec but looking at the grammar
productions you appear to be referring to the following spec -
http://www.w3.org/TeamSubmission/turtle/
This spec is in the process of being superseded by an official W3C standardized
version of Turtle - http://www.w3.org/TR/turtle/ - which is what Jena now
supports
The original Turtle specification allowed spaces in URIs because it was
developed before/around the time when the RDF and SPARQL working groups were
settling on the use of IRIs. IRIs allow for internationalized identifiers but
they also do not permit spaces (unlike URIs)
Therefore Jena is correct in it's behavior of rejecting URIs containing spaces
regardless of where said URIs originate
> Turtle parser does not support spaces in URI references
> -------------------------------------------------------
>
> Key: JENA-281
> URL: https://issues.apache.org/jira/browse/JENA-281
> Project: Apache Jena
> Issue Type: Bug
> Components: Jena
> Affects Versions: Jena 2.7.2
> Reporter: Piotr Hołubowicz
>
> According to the Turtle spec [1], spaces are allowed in URI references:
> {quote}
> [34] relativeURI ::= ucharacter*
> [41] ucharacter ::= ( character - #x3E ) | '\>'
> [38] character ::= '\u' hex hex hex hex |
> '\U' hex hex hex hex hex hex hex hex |
> '\\' |
> [#x20-#x5B] | [#x5D-#x10FFFF] // #x20 = " "
> {quote}
> However, when reading a turtle file with spaces in URI references, exception
> is thrown:
> {code}
> com.hp.hpl.jena.n3.turtle.TurtleParseException: Lexical error at line 1,
> column 6. Encountered: " " (32), after : "<a"
> at com.hp.hpl.jena.n3.turtle.ParserTurtle.parse(ParserTurtle.java:56)
> at
> com.hp.hpl.jena.n3.turtle.TurtleReader.readWorker(TurtleReader.java:33)
> at com.hp.hpl.jena.n3.JenaReaderBase.readImpl(JenaReaderBase.java:119)
> at com.hp.hpl.jena.n3.JenaReaderBase.read(JenaReaderBase.java:84)
> at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:268)
> at
> com.hp.hpl.jena.ontology.impl.OntModelImpl.read(OntModelImpl.java:2241)
> (...)
> {code}
> The Turtle writer also doesn't support unescaped spaces, so for example an
> RDF graph can be uploaded to Jena in RDF/XML but downloading it in Turtle
> causes an exception similar to the above.
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