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Define repository in terms of OBIEE?
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Answer / madhu
Repository stores the Meta data information. The extension of the repository file is “.rpd”. With OBIEE Server, all the rules needed for security, data modeling, aggregate navigation, caching, and connectivity is stored in metadata repositories. Each metadata repository can store multiple business models. OBIEE Server can access multiple repositories
Repository is divided into three layer,
1. Physical – Represents the data Sources
2. Business – model the Data sources into Facts and Dimension and apply business logic
3. Presentation – Specifies the user’s view of the data rendered in OBIEE answers client
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Teradata 
