Working With Relationships

This chapter describes how to create and configure relationships in EOModeler. It also provides an introduction to relationships. It is organized in the following sections:

• “About Relationships” introduces the concept of relationships as defined by the entity-relational paradigm. It also discusses basic principles of relationships such as cardinality, joins, and relationship keys.
• “Creating Relationships” describes how to use EOModeler to create relationships.
• “Tips for Specifying Relationships” provides some general design patterns when creating relationships.
• “Adding Referential Integrity Rules” discusses the various referential integrity rules supported by Enterprise Objects, such as the delete rules and optionality.
• “Flattened Relationships” describes what flattened relationships are and how to form them in EOModeler.
• “Modeling Many-to-Many Relationships” discusses how to build many-to-many relationships using EOModeler.