To build a good database requires reliable data relevant to the user's application and a data architecture that efficiently loads the information into a database system. In this chapter we focus on the actual database building process and recommend other chapters of this book for additional important information on computerizing materials data. To allow this focus, we build a model database from test data from an automotive composite structure without reviewing the design requirements that led to this particular test matrix for automotive materials. In this model development we must deal with a complication not usually found in building numeric databases, namely, technical data requiring extensive metadata for safe use.