Understanding Enterprise Architecture

This week my Green ICT students at ANU have been discussing Enterprise Architecture. Last year I used the Business Enterprise Architecture (BEA) of the US Department of Defense (DoD) as an example. But this is very complex. So this year I changed to the Australian Government Information Management Office (AGIMO), Australian Government Architecture. This was not a lot better. One student pointed out TOGAF Version 9 Enterprise Edition . This seems simpler to understand.