Data dictionaries are used to list and describe all primitive data elements needed for ProPower's system. Primitive data elements are those that stand alone and do not combine with other elements in the system (such as “customer phone number”). As elements are documented through the requirements gathering phase, the analyst can remove any duplication in order to plan for database design and to receive validation from the project team that all elements have been documented. Information in the table that follows this page can be used to assist database design, input valid ranges for validation that are will be available for reference purposes