W3C home > Mailing lists > Public > public-rdf-wg@w3.org > October 2012

Re: Potential Formal Object from DERI over JSON-LD

From: Richard Cyganiak <richard@cyganiak.de>
Date: Tue, 23 Oct 2012 12:25:25 +0100
Cc: Manu Sporny <msporny@digitalbazaar.com>, RDF WG <public-rdf-wg@w3.org>
Message-Id: <7E5C066E-5CBF-4091-93B7-80618D1E2CA7@cyganiak.de>
To: Pat Hayes <phayes@ihmc.us>
Hi Pat,

On 23 Oct 2012, at 03:07, Pat Hayes wrote:
>>> I would be very interested to discover what y'all consider the be the definition of Linked Data. Can you provide a pointer to where this can be found? Thanks in advance.
>> 
>> http://en.wikipedia.org/wiki/Linked_Data
> 
> This is completely vacuous, almost a textbook example of a Wikipedia article that is free of content (there are quite a number of them.) For example, it begins, " linked data describes a method of publishing structured data" but it then does not tell us what this "method" actually is. Which is what my query was asking for. What actually IS "linked data"? If I were shown some data, or a data storage scheme of some kind, how would I know if it were an example of linked data? How would I tell? What criteria would I use to detect the presence of "linkedness" in the data? (Can anyone give me an example of data that is not linked data, and tell me why it isn't? That would be a start.) 

http://en.wikipedia.org/wiki/Linked_Data#Principles

> That is great, but how would anyone know that this is what they were in fact doing? Does just using JSON + using URIs make it linked data? Apparently not, according to the Wikipedia article, which says that linked data pre-dates URIs.

No, it says that the general idea predates URIs (and that claim is flagged with [citation needed]), but that the term was coined by TimBL. Following the references you'll see that his original article prominently features URIs.

> So what is it that makes the linked magic happen? 

See the link above.

> This is completely vacuous

> free of content
> empty phrase devoid of meaning


Translation Pat => English: “I don't understand it.”

Best,
Richard




> 
> Pat
> 
> 
>> That's great. However, there's a thin line between saying “we enable LD with JSON” and “JSON-LD is how you do LD”. The JSON-LD spec really ought to say only the first thing, but slips into implying the second too often.
>> 
>> Attempting to enforce a particular implementation technology for Linked Data, be it RDF or JSON or Atom or Microdata or whatever, doesn't work. This is what Kingsley keeps repeating on a daily basis, and he's right.
>> 
>> The fact that a JSON-LD document also can be parsed to an RDF graph is mostly orthogonal to this.
>> 
>> Best,
>> Richard
>> 
> 
> ------------------------------------------------------------
> IHMC                                     (850)434 8903 or (650)494 3973   
> 40 South Alcaniz St.           (850)202 4416   office
> Pensacola                            (850)202 4440   fax
> FL 32502                              (850)291 0667   mobile
> phayesAT-SIGNihmc.us       http://www.ihmc.us/users/phayes
> 
> 
> 
> 
> 
> 
Received on Tuesday, 23 October 2012 11:26:14 GMT

This archive was generated by hypermail 2.3.1 : Tuesday, 26 March 2013 16:25:52 GMT