Fig. 7.3.7 The elements of a database.

The elements of the database design include keys, attributes, records, and indexes.

Relating the Different Levels of the Data Model

The different levels of the data model are akin to the different levels of mapping that
exist in the world. Fig. 7.3.8 shows how the different levels of mapping relate to each
other.

Chapter 7.3: Data Modeling for the Structured Environment