It is technology independent and as such operates as a communication medium between business people and application developers. Zachman used the phrase Conceptual Model in his framework to refer to a high-level data model, a starting point for the complete logical data model. It represents a picture of the information requirements of the entire organization without any detail. It is not a normalized model. In contrast, an Enterprise Model is a logical data model of the entire organization including all data elements.
Most organizations create the enterprise model by combining the logical models of several projects.
This model is stored in a repository and used by all new application development project teams. A Project logical data model includes only the business requirements within the scope of the project. An End-User Model is a simplified view of the project data model used to present project progress to business area experts and their management. The words logical and essential describe the representation of information from an end-user perspective, without regard to its physical or technological aspects. They describe what the business requirements are, not how they are implemented, stored or processed.