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Re: Action-48 text: a New Plan for plain literals

From: Pat Hayes <phayes@ihmc.us>
Date: Mon, 23 May 2011 20:29:46 -0500
Cc: public-rdf-wg@w3.org
Message-Id: <BB0A6C9E-08A4-4D1E-AE9D-841D82DA6F3F@ihmc.us>
To: Andy Seaborne <andy.seaborne@epimorphics.com>

On May 23, 2011, at 3:48 PM, Andy Seaborne wrote:

> 
> 
> On 23/05/11 04:01, Pat Hayes wrote:
>> The proposal outlined in the wiki here
>> 
>> http://www.w3.org/2011/rdf-wg/wiki/StringLiterals/LanguageTaggedLiteralDatatypeProposal
>> 
>> completes Richard and my action item 48 from the last telecon.
>> 
>> Pat
> 
> -0
> 
> I'm not sure this provides sufficient benefit - tagged literals exist and applications have to (and want to) deal with them.

True, but I don't quite see your point. 

> 
> It does mean you can write "rdfs:range rdf:LanguageTaggedString" ; it's hard to say "rdfs:range <a string, which might be tagged>" (I suppose rdf:PlainLiteral would capture that

Yes, exactly, that is the intention. rdf:PlainLIteral is any plain literal, which means now xsd:string literals and lang tagged literals; and rdf:LTL is just the lang tagged literals. And just the untagged ones is xsd:string, of course. rdf:PlainLIteral is the (disjoint) union of xsd:string and rdf:LTL. 

> ).
> 
> So taking Ivan's FOAF file:
> 
> <foaf:name xml:lang="hu">Herman Iván</foaf:name>
> <foaf:name>Ivan Herman</foaf:name>
> 
> It does have a cost which is the deployed code that assumes literals have a language tag or a datatype.

Well, that has to now be understood as either a lang tag or a datatype **other than rdf:LanguageTaggedLiteral**. As nobody has previously written code that mentioned  this datatype, I don't think this is likely to cause any serious problems. And notice, the proposal keeps the present written form of all RDF string literals in all RDF surface syntaxes. 

Pat


> 
> 	Andy
> 
> 

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Received on Tuesday, 24 May 2011 01:30:36 GMT

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