The repository for definitions of data processes data flows data stores and data elements is the "DATA DICTIONARY"

Metadata is data that is about data.?æ Although it describes the data, it's not considered business data. Master data is business data. Run-time data is data that is in the process of being run.

Data Store

Data Reserve

Data Stow

Data Warehouse

Data Repository

Data Depot

Data Storehouse

Data formats:

It is formating all data file from pcs.whatever it is not use.suppose when data is full,and some data we want to delete it..

Data collection:

It is the collection of new data file.when new data is collecting..

Data dictionary is a repository to store all information.

Meta data is data about data. It is data that defines other

data. The data dictionary can be metadata that describes

some information about the database.