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Re: [PR Media Fragment] specify how further keywords would be added

From: Liam R E Quin <liam@w3.org>
Date: Sun, 22 Apr 2012 21:53:34 -0400
To: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
Cc: Jack Jansen <Jack.Jansen@cwi.nl>, public-media-fragment@w3.org
Message-ID: <1335146014.23683.74.camel@localhost.localdomain>
On Mon, 2012-04-23 at 08:05 +1000, Silvia Pfeiffer wrote:

> This is actually a problem for all media types. We have addressed this
> is the following section:
> http://www.w3.org/TR/media-frags/#standardisation-URI-fragments

I had missed the sentence,
"As such, the intention of this document is to propose a specification
to all media type owners"
and your response resolves that part of my comment, thank you!


[...]
> Both of Liam's proposals add a new parameter,
[...]
> 
> If xywh was used together with xySwh to achieve some backwards
> compatibility,
It was not clear to me how to do that. What would the syntax look like
exactly?

I was assuming people would use xySwh _instead_ of xywh when they wanted
to add an "S" parameter to an isotropic/linear transform.

Note, I'm not asking or a normative change in the spec (not likely given
its status) but a note to explain how one adds a parameter in such a
case.
The example in the spec,
http://www.example.com/example.ogv#track=audio&t=10,20
does help, but only when the parameters are orthogonal.

By the way, the text [[
"&" is the only primary separator for name-value pairs, but some
server-side languages also treat ";" as a separator.
]]
suggests to me that implementations are encouraged to accept ; as a
secondary separator. This is a good thing for the same reason that
using ; between URI query parameters is better than using & in some
cases.

If I want to scale an image by 50% then xywh has a problem, I need to
use xy, then scale, then use wh. But, maybe it's enough for now.

Thank you for your responses; my concerns are satisfied enough that I do
not have any objection to the spec moving forward, thank you.

Liam


-- 
Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/
Pictures from old books: http://fromoldbooks.org/
Received on Monday, 23 April 2012 01:57:30 UTC

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