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Department of Defense. (2009). Department of Defense Architecture Framework Version 2.0. www.cio-nil.defense.gov/sites/dodaf20.
Federal Chief Information Officer Council. (2001). A Practical Guide to Federal Enterprise Architecture Version 1.0. www.enterprise-architecture.infor/images/Documents/Federal%20Enterprise%20Architecture%20Guide%20v1a.pdf.
Federal Enterprise Architecture Practice Guidance. http://www.egov.gov.
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Group on Earth Observations. www.earthobservations.org/geoss.shtml.
HHS Enterprise Architecture Segments. (2007). Department of Defense Architecture Framework Version 2.0. Volume 1. Practical Guide to Federal Enterprise Architecture.
The Open Group Architecture Framework (Introduction). http://opengroup.org.