summarize:

Summary Structure models, such as UML class models, describe the information structures of one or more business processes. + Structure models allow communication about database design. Structure models support the design, implementation, and use of databases. + The building blocks for UML class diagrams include classes, associations, multiplicities, and attributes. Attributes for each class include the primary key, foreign keys, and other attributes describing characteristics of the class. Primary keys uniquely define each instance of a class (and each row in a relational database table). Foreign keys allow tables to be linked together. Foreign keys are primary keys of other tables posted in the current table to allow linking. Other class diagram relationships include generalizations, aggregations, and compositions. Associations model the business purpose of a relationship between two classes, such as the role that members of one class have with respect to the other class. UML class models can be used to create tables by mapping classes to tables, mapping class attributes to table fields, mapping associations to foreign keys depending on the multiplicities of the association, and creating new tables to implement many-to-many relationships. Analysts must understand process decision requirements to truly understand how the process should perform. Business rules and decision tables establish business policies and constrain business processes. + Business models and business rules are important tools to improve corporate governance and implement internal controls