Bill Lewis is a principal consultant with Enterprise Warehousing Solutions. Lewis' 20-plus years of information technology experience span the financial services, energy, healthcare, software and consulting industries. In addition to his current specializations in data management, meta data management and business intelligence, he has been a leading-edge practitioner and thought-leader on topics ranging from software development tools to IT architecture. His book, Data Warehousing and E-Commerce, is available at online and brick-and-mortar booksellers. Lewis can be reached at firstname.lastname@example.org.