edits to reflect that we are defining two models, not one

[boucadair]

and other minor fixes

[fno2010]

Is there any guideline about the usage of the term "data model"? Is it equivalent to a "YANG module" or a top-level container in YANG? Although this document defines two YANG modules, they share a single top-level container.

[boucadair]

Is there any guideline about the usage of the term "data model"? Is it equivalent to a "YANG module" or a top-level container in YANG?

I'm not aware of any, other than the entries in RFC6020:

RFC 6020 defines:

    o  data model: A data model describes how data is represented and
       accessed.

    o  module: A YANG module defines a hierarchy of nodes that can be
       used for NETCONF-based operations.  With its definitions and the
       definitions it imports or includes from elsewhere, a module is
       self-contained and "compilable".

That's said, we need to be consistent in our use. For example, we do already have this in the title:

"YANG Data Models for the Application-Layer Traffic Optimization (ALTO).."