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* [[Federal Enterprise Architecture Framework]] (FEAF) : The 1999 documentation of the [[Federal Enterprise Architecture Framework]] Version 1.1 explains how the NIST Framework is used as a foundation of the [[Federal Enterprise Architecture|FEA]] Framework.<ref name="CIOC99"/>
* NWS Enterprise Architecture : Enterprise Architecture of the National Weather Service<ref>Bobby Jones (2003) [http://ams.confex.com/ams/pdfpapers/73211.pdf NWS Enterprise Architecture]. In: ''20th International Conference on Interactive Information and Processing Systems. 2004''.</ref>
== Foundations ==
In 1989 presentation of the NIST Enterprise Architecture Model Rigdon et al. (1989) <ref name="WBR 1989" >W. Bradford Rigdon (1989) "Architectures and Standards". In: ''Information Management Directions: The Integration Challenge''. E.N. Fong and A.H. Goldfine (eds.). NIST Sept 1989. p. 135-150</ref> explained that discussions about architecture in that time mostly focus on technology concerns. Their aim was to "takes a broader view, and describes the need for an ''enterprise architecture'' that includes an emphasis on business and information requirements. These higher level issues impact data and technology architectures and decisions."<ref>Rigdon (1989), p. 136</ref>
In order to develop an enterprise architecture Rigdon et al. (1989, p 137) acknowledge, that:
* There are multiple ways to develop an architecture
* There are multiple ways to implement standards
* Development and implementation should be customized to the environment
* Yet, every architecture itself can be divided into different levels.
[[File:Sample Elements of an Enterprise Architecture (1989).jpg|thumb|Sample Elements of an Enterprise Architecture (1989).]]
The different levels of an enterprise architecture can be visualized as a pyramid with "the business unit at the top and the delivery system at the base. An enterprise is composed of one or more Business Units that are responsible for a specific business area. The five levels of architecture are Business Unit, Information, Information System, Data and Delivery System."<ref name="Rig 1989"> Rigdon (1989), p. 137</ref>
The separate levels of an enterprise architecture are interrelated in a special way. The "depiction at one level assumes or dictates that architectures at the higher level.".<ref name="Rig 1989"/> The illustration on the right gives an example of which elements can constitute an Enterprise Architecture.
== See also ==
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