This books is reasonably good at providing some lowest common denominator models for the reporting end of data access. Transactional database of all creeds can be used to feed these reporting models: The Data Model Resource Book : A Library of Logical Data and Data Warehouse Designs http://www.amazon.com/exec/obidos/ASIN/0471153648/ ref=sim_books/104-0034940-6588767
Slashdot Mirror
This books is reasonably good at providing some lowest common denominator models for the reporting end of data access. Transactional database of all creeds can be used to feed these reporting models: The Data Model Resource Book : A Library of Logical Data and Data Warehouse Designs http://www.amazon.com/exec/obidos/ASIN/0471153648/ ref=sim_books/104-0034940-6588767