Re: ISSUE-268 (nigel): Purpose of new draft wording in 12.2.1 is unclear [TTML 1.0]

Not a bug. See 12.1.5 for meaning of "significant" in this context:

A ttm:agent metadata item is considered to be significant only when
specified as a child of the head element or as a child of a metadata element
child of the head element.


On Fri, Aug 9, 2013 at 5:30 AM, Timed Text Working Group Issue Tracker <
sysbot+tracker@w3.org> wrote:

> ISSUE-268 (nigel): Purpose of new draft wording in 12.2.1 is unclear [TTML
> 1.0]
>
> http://www.w3.org/AudioVideo/TT/tracker/issues/268
>
> Raised by: Nigel Megitt
> On product: TTML 1.0
>
> The edit to 12.2.1 described in
> https://dvcs.w3.org/hg/ttml/raw-file/default/ttml10/spec/ttml-changes.html#change-history-per-to-rec-23section 1.1 adds the word "significant" into the sentence:
>
> If specified, a ttm:agent attribute must reference significant ttm:agent
> element instances that appear as a descendent of the same Document Instance
> as that of the referring element.
>
> The intended additional meaning introduced by this edit is unclear. The
> text already says that the referenced agent must appear within the
> document, and there are restricted locations where it can be. I propose
> either reverting the edit or adding text to explain what distinguishes a
> "significant" agent from any other kind.
>
>
>
>
>