[Simple] Continuous presence

["Thomson, Martin" <Martin.Thomson at andrew.com>]

I've submitted -02 of the continuous-valued presence considerations document.

  <http://tools.ietf.org/html/draft-thomson-simple-cont-presence-val-req>

Perhaps the most significant change is the recognition that a PA is primarily, in the case of continuous-valued data, a cache.  The rest is largely editorial.

This document deals with an issue at a somewhat different level to the rest of the work in this WG.  I'm most interested in whether there is sufficient interest in making this information formal.

There are also more pragmatic questions that I'd like answered:
Are there problems here worth addressing?  (We've seen sipcore take on the event rate work, which is excellent, but is there anything else?)

If so, are there areas where generic solutions are desirable?  Or should we in GEOPRIV just go on with defining location-specific elements for things like presence filters?

--Martin
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