Re: [Rats] What's to EAT? - terminology clarification

[Schönwälder, Jürgen <[e-mail]>]

On Wed, Nov 13, 2019 at 03:09:47AM +0000, Salz, Rich wrote:
> When I see discussions using terms like serialization and information model, I start to get traumatized, thinking of what happened when XML was switched from a syntax to an “infoset” and took XML Schema, WSDL, web services, and everything else down with it.
>

I believe that not agreeing on terminology causes misunderstandings
and ultimately delays progress.

Concerning IMs and DMs, here is the (extended) RFC 3444 view that
is commonly used by some parts of the IETF:

                 IM               --> conceptual/abstract model
                 |                    for designers and operators
      +----------+---------+
      |          |         |
      DM         DM        DM     --> concrete/detailed model
      |          |         |          for implementors
   +--+--+   +--+--+--+    |
   |     |   |  |  |  |    |
   EN    EN  EN EN EN EN   EN     --> encodings / representation formats
                                      for instance data
With YANG, we have:

          YANG                    --> concrete/detailed model
            |                         for implementors
      +-----+-----+
      |     |     |
     XML  JSON [CBOR]             --> encodings / representation formats
                                      for instance data

IMs that are more abstract than YANG I have seen written informally
(diagrams plus text) or using ad-hoc semi-formal notations.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
Fax:   [phone]         <https://www.jacobs-university.de/>