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Re: [Json] Proposed change: update the Unicode version

"Matt Miller (mamille2)" <mamille2@cisco.com> Wed, 05 June 2013 17:55 UTC

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From: "Matt Miller (mamille2)" <mamille2@cisco.com>
To: John Cowan <cowan@mercury.ccil.org>
Thread-Topic: [Json] Proposed change: update the Unicode version
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Date: Wed, 05 Jun 2013 17:55:23 +0000
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Cc: Carsten Bormann <cabo@tzi.org>, Tim Bray <tbray@textuality.com>, "json@ietf.org" <json@ietf.org>
Subject: Re: [Json] Proposed change: update the Unicode version
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On Jun 5, 2013, at 11:00 AM, John Cowan <cowan@mercury.ccil.org>
 wrote:

> Tim Bray scripsit:
> 
>> Hm? The first paragraph says “A Unicode string data type is simply an
>> ordered sequence of code units. Thus a Unicode 8-bit string is an ordered
>> sequence of 8-bit code units, a Unicode 16-bit string is an ordered
>> sequence of 16-bit code units, and a Unicode 32-bit string is an  ordered
>> sequence of 32-bit code units.”
> 
> Yes, but is that what you actually want?  If so, you probably want the
> "sequence of 16-bit code units" language.  This matches JavaScript and
> at least some implementations of JSON.
> 
> However, I want a JSON string to be an ordered sequence of codepoints/
> characters, not of code units.


/me doffs hat

When it's actually inside the JavaScript interpreter, a "sequence of 16-bit code units" is most likely correct.  Over the wire or on the filesystem, that isn't necessarily true; often, it is a "sequence of 8-bit code units".

I think here we need to concentrate on what's over the wire/on the filesystem, not what's in the interpreter/processor/etc.


- m&m

Matt Miller < mamille2@cisco.com >
Cisco Systems, Inc.

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