[core] Comments on draft-hartke-coap-observe-00

[Robert Cragie <[e-mail]>]

Sorry these are a little late.

 To summarize:

	* The document moves around layers of abstraction somewhat. Some of
the concepts are quite abstract (observer, subject etc.), then it
talks about messages, then it refers to reliable UDP. I think it
should keep to the abstract level and defer discussion on the more
specific layers to other documents
	* I know I have said this before but I believe it is important to
abstract the transaction model from the methods themselves. This means
we can put a clean break between the RESTful part (plus pub/sub) and
the transactions (HTTP-like or more asynchronous for M2M). What may be
missing is to specify abstract properties of the delivery, which is
sort of addressed by message types in this document.

 I tried to attach as modified original but I think it was too large
for mail server. In the attachment my comments are in as .  indicates
where I have put out text not directly relevant to the comment.

 Robert
-- 

	Robert Cragie (Pacific Gas & Electric) 

	Gridmerge Ltd.
 89 Greenfield Crescent,
 Wakefield, WF4 4WA, UK
 [phone]
 [phone]
http://www.gridmerge.com [1]



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