Invalid Turtle created for URIs ending in a dot

[Osma Suominen]

Hi!

I noticed a problem with rdflib producing Turtle files that cannot be
parsed by Jena. The problem is with URIs ending in a dot.

Minimal test case: parse the following NT file and serialize into Turtle:

<http://example.com/exuri.> <http://example.com/prop>
<http://example.com/value> .

The output with current rdflib 4.0-dev looks like this:

--cut--
@prefix ns1: <http://example.com/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xml: <http://www.w3.org/XML/1998/namespace> .

ns1:exuri. ns1:prop ns1:value .
--cut--

But Jena gives me this error parsing the Turtle output of rdflib:
org.apache.jena.riot.RiotException: [line: 6, col: 11] Not a valid token
for an RDF term: [DOT]

I think the current Turtle spec forbids a dot as the last character of a
QName. See http://www.w3.org/TR/turtle/#grammar-production-PN_LOCAL

The correct representation would be to spell out the whole URI as
<http://example.com/exuri.> in Turtle instead of trying to abbreviate it.

-Osma

--
Osma Suominen
Information Systems Specialist
National Library of Finland
P.O. Box 26 (Teollisuuskatu 23)
00014 HELSINGIN YLIOPISTO
Tel. +358 50 3199529
osma.s...@helsinki.fi
http://www.nationallibrary.fi

[Gunnar Aastrand Grimnes]

You are right, I made this:

https://github.com/RDFLib/rdflib/issues/282



- Gunnar

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