Models for Enterprise Architectures

According to Wikipedia articles there exist a number of models for Enterprise Architectures.

• The Open Group Architecture Framework (TOGAF)
• Zachman Framework (IBM Framework from the 1980s, now claimed as a de facto world standard)
• Department of Defence Architectural Framework
• Federal Enterprise Architecture Framework (United States Office of Management and Budget Federal Enterprise Architecture)
• United Kingdom Ministry of Defence Architectural Framework
• AGATE (French Délégation Générale pour l'Armement Atelier de Gestion de l'ArchiTEcture des systèmes d'information et de communication)

I think taking a look at these different modelling approaches may prove helpful in order to discuss more easily company structures as well as technical aspects.