In an active data dictionary constraints may be placed upon the underlying data.
2.
With an active data dictionary, the dictionary is updated first and changes occur in the DBMS automatically as a result.
3.
It was based on an active data dictionary that was able to invoke the full interpretive power of the MUMPS language from within a data reference.
4.
Additionally, a distributed DBMS may have certain location specifics described within its active data dictionary ( e . g . where Tables are physically located ).