W3C home > Mailing lists > Public > public-tt@w3.org > April 2012

Re: TTML attributes in "no namespace"

From: Glenn Adams <glenn@skynav.com>
Date: Thu, 26 Apr 2012 19:23:58 -0600
Message-ID: <CACQ=j+c7LOjfTwVwx+J7VUWT3zRF2=SUrEv0=25YjdoyuB32kQ@mail.gmail.com>
To: Andreas Tai <tai@irt.de>
Cc: public-tt <public-tt@w3.org>
by design; what this means is that they are in the "per-element type
partition" as defined in [1] ;

[1] http://www.w3.org/TR/1999/REC-xml-names-19990114/

a more recent formulation [2] refers to this usage as follows:

"Default namespace declarations do not apply directly to attribute names;
the interpretation of unprefixed attributes is determined by the element on
which they appear."

[2] http://www.w3.org/TR/REC-xml-names/#defaulting

the intention is that these attributes be used without a prefix
(unprefixed) and that their definition is determined by the element on
which they appear; one reason was that, with the exception of 'region', all
of these were based on or derived from existing unprefixed usage patterns
in other W3C specs (HTML, SMIL); in the case of region, we did not wish it
used as a generic vocabulary attribute, but only be used on the specific
elements for which it was defined

On Thu, Apr 26, 2012 at 9:20 AM, Andreas Tai <tai@irt.de> wrote:

> According to the TTML XSD the following attributes are in "no namespace"
>
> - region
> - style
> - begin
> - end
> - dur
> - timeContainer
>
> My question is if this was designed on purpose and if so what the
> intention was. In the spec there is no information on attributes in "no
> namespace".
>
> Best regards,
>
> Andreas
>
> --
> ------------------------------**------------------
> Andreas Tai
> Production Systems Television IRT - Institut fuer Rundfunktechnik GmbH
> R&D Institute of ARD, ZDF, DRadio, ORF and SRG/SSR
> Floriansmuehlstrasse 60, D-80939 Munich, Germany
>
> Phone: +49 89 32399-389 | Fax: +49 89 32399-200
> http: www.irt.de | Email: tai@irt.de
> ------------------------------**------------------
>
> registration court&   managing director:
> Munich Commercial, RegNo. B 5191
> Dr. Klaus Illgner-Fehns
> ------------------------------**------------------
>
>
>
>
Received on Friday, 27 April 2012 01:24:49 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Friday, 27 April 2012 01:24:50 GMT