In as much as metadata is data about data, this information is frequently stored in a c central location called as metadata registry. The metadata registry is the location wheremetadata definitions are stored and maintained in a controlled method.
Metadata registries are useful to organization who wants to standradize their data. Examples of these organization cases include:
1. Organizations that uses structures such as XML, Web Services or EDI to transmit data.
2. Organizations that require consistent definitions of data across time, between organizations or between processes. Example is when an organization builds a data warehouse.
3. Organizations that attempts to break down "silos" of information captured within applications or proprietary file formats
A metadata location or registry has the following characteristics:
1. It is in a safe area wherein authorized individuals can make changes.
2. It stores data elements which include both semantics and representations.
3. The metadata registry semantic areas contain the meaning of a data element with precise definitions
4. The metadata registry representational areas define how the data is represented in a specific format, either within a database or a structured file format such as XML.
The metadata registries needs to be managed. Companies should have a program called metadata management which will store information about other information. There are different types of media used as references to the location of the data which requires that there be management of diverse repositories.
Metadata is the key in providing users and applications a roadmap to where information is stored in the warehouse.