SDIF is used. In some communities, it is used quite heavily.
In most other communities that have to exchange documents,
DTDs, and public types, it is considered far too general, complex,
^^^^^^^^^^^^^^^^
Complexity reduces generality. The more options, them
more specific the model, the smaller the sphere to which it can
be applied.
and overhead-laden for
the applications usually encountered, and simple, problem-specific
arrangements are used instead.
Whatever happened to simple, generic arrangements? :-)
Tim