This is not a new concept, but it is fast becoming a specialized area in Data Management. Example in a company employee list & details are managed in central repository and distributed it all over the organization. Similar thing can happen to customer list/details, stock list/ details etc.
What is the relationship of such repositories with data warehouse? Are they part of data warehouse? How can they be integrated into the data warehouse? And many more questions.
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I will add more on this article. But meanwhile here is a link to read some practical example.