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Regarding the SHOULD for NFC in RDF Literals

From: Sebastian Hellmann <hellmann@informatik.uni-leipzig.de>
Date: Sun, 22 Sep 2013 22:42:17 +0200
Message-ID: <523F5629.2030308@informatik.uni-leipzig.de>
To: public-rdf-comments@w3.org
Hello all,

I was asking myself another question regarding the "should" in 3.3. 

>   * a lexical form, being a Unicode [UNICODE
>     <http://www.w3.org/TR/rdf11-concepts/#bib-UNICODE>] string, which
>     /SHOULD/ be in Normal Form C [NFC
>     <http://www.w3.org/TR/rdf11-concepts/#bib-NFC>],

http://www.ietf.org/rfc/rfc2119.txt says regarding SHOULD:
> 3. SHOULD   This word, or the adjective "RECOMMENDED", mean that there
>     may exist valid reasons in particular circumstances to ignore a
>     particular item, but the full implications must be understood and
>     carefully weighed before choosing a different course.

I am not sure, what reasons could exist not to require NFC . N-Triples 
doesn't seem to use ASCII any more in its next version. What is the hold 
up to change this to a MUST and write a validation test case?

I am just asking out of curiosity. The topic is complex and the "full 
implications must be understood and carefully weighed before choosing a 
different course" justify a SHOULD as well.

All the best,

Dipl. Inf. Sebastian Hellmann
Department of Computer Science, University of Leipzig
* NLP & DBpedia 2013 (http://nlp-dbpedia2013.blogs.aksw.org, Extended 
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* LSWT 23/24 Sept, 2013 in Leipzig (http://aksw.org/lswt)
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Received on Sunday, 22 September 2013 20:42:46 UTC

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