In the previous three chapters we looked at some of the more common enterprise architecture frameworks. In this chapter we look at some of the underlying standards that have originated from the traditional standards-making bodies, specifically from standards development organizations (SDOs). Standards-based industry consensus on the approach to enterprise inter-and intradomain (or organization) integration is a prerequisite for real commercial acceptance and application of the enterprise architecture technology on a broad scale. Fortunately, there are several ongoing research activities in this arena seeking to establish common terminology and approach.