Mission Possible? Open Architecture ATE

What constitutes an open architecture and can it be defined for ATE? For a system architecture to be accepted as standard and open in any industry, it must be documented in such a way that anyone can follow and implement it. It must also accommodate all the interface standards that have been previously established and are in place in the industry. It must fulfill the technical and economic requirements of the industry using the standard and the customers buying it, and above all it must be accepted and implemented by most of the major players within the industry.