[T2TRG] CoRAL Dictionaries and the side meeting yesterday

[Jim Schaad <[e-mail]>]

Klaus,

I am still having some problems with the way that you described how
dictionaries would work for CoRE apps with a single dictionary being used.

My understanding of what you said is that:
1.  We would define a CoRE apps dictionary and pre-populate it with some of
the common items
2.  For each new CoRE app created (by the IETF?) the dictionary will be
extended by adding the new items to the dictionary (maybe the end, maybe
later)

The assumption here seems to be that a CoRE app would never be extended with
new things.  As an example of what I mean consider the following:

*  Given the intense pressure from the ACE working group, the CoRE WG gets
it act together and releases a version 1 Pub-Sub server.  
* So a client and a server are released which use the dictionary for
compression and are both happy.
*  A version 2 of the Pub-Sub server gets released.  This adds some
vocabulary around wills.  The vocabulary is then added to the CoRE App
dictionary
*  The Pub-Sub server gets updated because it is a big box, but the client
does not because it is small
*  The client queries the Pub-Sub server and gets back some compression
points which it does not recognize.

What am I missing?

Jim