$2.$ Each case handled by a law firm has a unique case number; a date opened, date closed, and judgment description are also kept on each case. A case is brought by one or more plaintiffs and the same plaintiff can be involved in many cases. A plaintiff has a requested judgment characteristic. A case is against one or more defendants and the same defendant may be involved in many cases. A plaintiff or defendant may be a person or an organization. Over time, the same person or organization may be a plaintiff or defendant in cases. In either situation, such legal entities are identified by an entity number, and other attributes are name and net worth.