Final answer:
To map an EER schema with an n-ary relationship to an ODB schema, classes are created for entities, and the n-ary relationship is represented by either a separate class or reference lists. The focus is on preserving the attributes and constraints of the original schema.
Step-by-step explanation:
Mapping EER Schema to ODB Schema
To map an Extended Entity-Relationship (EER) schema with an n-ary relationship of degree n>2 to an Object-Oriented Database (ODB) schema, one needs to follow several steps to ensure a proper translation between these two types of data models. The process generally involves creating classes for each entity, defining relationships as object references or collections, and ensuring that all the constraints and attributes are correctly mapped.
In a practical example, assume you have an n-ary relationship involving entities like Student, Course, and Instructor. In an ODB schema, you would create classes for these entities. The n-ary relationship can be represented by a separate class if it contains attributes, or by adding reference lists in one of the participating classes, depending on the database design. The multiplicity and navigability of the relationships should be clear in the class definitions to maintain the integrity of the original EER schema.