<P> Each database management system ( DBMS ) and database tools have their own language for the metadata components within . Database applications already have their own repositories or registries that are expected to provide all of the necessary functionality to access the data stored within . Vendors do not want other companies to be capable of easily migrating data away from their products and into competitors products , so they are proprietary with the way they handle metadata . CASE tools , DBMS dictionaries , ETL tools , data cleansing tools , OLAP tools , and data mining tools all handle and store metadata differently . Only a metadata repository can be designed to store the metadata components from all of these tools . </P>
<P> Each database management system ( DBMS ) and database tools have their own language for the metadata components within . Database applications already have their own repositories or registries that are expected to provide all of the necessary functionality to access the data stored within . Vendors do not want other companies to be capable of easily migrating data away from their products and into competitors products , so they are proprietary with the way they handle metadata . CASE tools , DBMS dictionaries , ETL tools , data cleansing tools , OLAP tools , and data mining tools all handle and store metadata differently . Only a metadata repository can be designed to store the metadata components from all of these tools . </P>
what stores metadata instead of actual data in dbms
what stores metadata instead of actual data in dbms
a metadata repository
a metadata repository