Document: draft-ietf-sipcore-reinvite-06
Reviewer: Elwyn Davies
Review Date: 2010-10-19
IETF LC End Date: 2010-10-20
IESG Telechat date: (if known)

Summary:
This document is probably ready for publication as a provisional standard.  
Caveat:  This document purports to clarify some fairly convoluted logic that 
had confused implementors.  It appears reasonably well presented but is 
*still* extremely complex and I make no guarantees that it is either 
correct or will really do the business of clarification for given 
implememtors - I assume that is has been run past a sample of 
implementors to check that it does indeed provide clarification and  that 
more SIP-wise persons believe that it is consistent with the documents that 
it updates and correct so far as can be ascertained.  In particular the last 
(and very long) para of section 3.3 is *very* complicated.  I was also not 
totally happy that I could immediately convince myself that the statements in 
the last para of section 3.5 indicating that the statements of section 
3.4 covered the situation were really true, but then I am far from beimg 
a SIP expert.

Nits:
-The expansion of UAS is needed in para 2 of Section 1  whereas it is 
currently in para 4.
- Figures 3 and 4 have the same title - they are about the same basic 
situation but with response/timing differences - a differentiation in the 
titles would help.