Architecture of Business and IT Enterprise Architecture: an architecture from the Business perspectives

While an Architecture of business organisation includes an Intrinsic Architecture and a Practice of Architecture, the Enterprise and even Business Archtiectures, defined by TOG, are predominantly a practice or implementation of an undefined architecture at the enterprise (rather than an IT) level. From the IT viewpoint, the enterprise is constituted by the corporate-wide technology; from the corporate-wide business viewpoint, technology and its architectural practice (EA) are just types of resources Business Capabilities may utilise to reach the strategic objectives of the business.