data with metadata

Would it be a good idea to define "fortran data sets" as part of the
language?

These datasets would store metadata in addition to data. You can read
the fields in any order , select only a subset to read etc. and the
data-types are known outside the code.

These data sets can be made compatible with SQL and Fortran read/write
from/to RDBMS's can be made standard.
.