W3C home > Mailing lists > Public > public-linked-json@w3.org > July 2011

Re: JSON-LD Telecon Minutes for 2011-07-04

From: Ted Thibodeau Jr <tthibodeau@openlinksw.com>
Date: Tue, 19 Jul 2011 11:00:42 -0400
Cc: public-linked-json@w3.org
Message-Id: <5FB7AC60-C933-4C9E-98AF-767FFC75133F@openlinksw.com>
To: Manu Sporny <msporny@digitalbazaar.com>

On Jul 18, 2011, at 09:00 PM, Manu Sporny wrote:

> I think we're skirting very close to letting theoretical purity
> get in the way of getting real work done. If we don't allow
> unlabeled nodes (or whatever you want to call them), then this
> is illegal in JSON-LD:
> 
> {
>   "name": "Kingsley Idehen"
> }
> 
> If that is an illegal statement in JSON-LD, then JSON-LD is
> certainly not a sub-set of JSON, but a newer, more limited form
> of JSON - and that is when just about every JSON developer will
> look away from JSON-LD and keep looking for something that will
> work for them in the real-world.


Manu --

It seems that your definition of "sub-set" may differ from mine.

To my mind --

- JSON is less restrictive than JSON-LD.

- JSON is more permissive than JSON-LD.

- All JSON-LD is JSON.

- Some JSON is not JSON-LD; is JSON-NLD ("Non-Linked Data").

If this were a Venn Diagram, you'd see two circles, one (JSON-LD) 
entirely contained within the other (JSON).

Further --

- JSON allows for IRI-less nodes.

- JSON-LD *SHOULD NOT* allow for IRI-less nodes.

An IRI-less node cannot be usefully referred to over time, 
nor across graphs (or JSON or other documents).  Such a node's
description cannot be re-retrieved later.

An IRI-bearing node can be usefully referred to over time and 
across graphs, and its description can be retrieved time and 
time again, potentially growing and/or being refined at each
retrieval (dereference).

Such reference (and dereferenceability) is the most important
aspect of Linked Data (LD) that sets it apart from Non-Linked 
Data (NLD)-- i.e., the LINK.

Given all that, I think this follows --

- A JSON-LD document MUST NOT include JSON-NLD.

- A JSON document MAY include JSON-NLD and JSON-LD -- i.e., 
  it MAY intermingle Linked Data and Non-Linked Data.  

- Intermingled JSON-LD and JSON-NLD is preferred over pure 
  JSON-NLD.  Pure JSON-LD is preferred over such intermingling.

Be seeing you,

Ted





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Received on Tuesday, 19 July 2011 15:01:16 UTC

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