The Zachman Framework™ is an enterprise ontology and metamodel for enterprise architecture. which provides a formal and structured way of viewing and defining an enterprise. The ontology is a two dimensional classification schema that reflects the intersection between two historical classifications.
The Zachman Framework is not a methodology, like the TOGAF® Architecture Development Method (ADM), but rather a template describing how different abstract ideas are viewed from different perspectives. It is an ontology matrix simply that helps to form a logical structure for classifying and organizing artifacts developed in enterprise architecture.
Zachman is focused on identifying the different viewpoints that might be relevant for different purposes while TOGAF is focused on the process of developing architectures.
Presenter: John A. Zachman