Today large organizations are being served by different types of area processing and information systems. It is important to create an integrated repository of what these system contain and do it in order to use them collectively and effectively. The repository contains metadata of source systems effectively. The repository contains metadata of source systems data warehouse and also business data. Metadata, usually called data about data, is an important part. Metadata is supposed to be a helping hand to all co-workers in an organization that work directly or indirectly with the data warehouse.