BCP 47 "t" extension follow up and locale identifier definition

Dear Mark, with CC to the MultilingualWeb LT and the i18n core public list,

I have an action ACTION-133 to follow up on the BCP 47 discussion we had
with your contribution on 12 June. Thanks again for your presentation.

In our requirements document
http://www.w3.org/TR/2012/WD-its2req-20120524/
we have several requirements related to processes, see e.g.
http://www.w3.org/TR/2012/WD-its2req-20120524/#Process_Model

Since the "t" extension is also meant to express process related
information, we want to coordinate the values that can be used via that
extension with what we define - or just refer to them. What would be the
best way to achieve this?

A related issue: we need to specify information about locales, see e.g.
http://www.w3.org/TR/2012/WD-its2req-20120524/#locale-filter
The current thinking about locale identifiers is here
http://www.w3.org/TR/2012/WD-its2req-20120524/#Identification_of_Language_and_Local
At the Dublin workshop there was already some feedback from Richard (IIRC):
if we have a dedicated field for a local identifier, than a basic BCP 47
language tag (without the underscore conversion) might do it. Do you have
any thoughts on this?

Thanks a lot for your feedback in advance,

Felix

-- 
Felix Sasaki
DFKI / W3C Fellow