Recommend (subject to discussion):

OBIX provides a foundation for developing new abstractions (Contracts) in vertical domains. OBIX is also extensible to support both legacy systems and new products. It is common for even standard building control systems to ship as a blank slate, to be completely programmed in the field. Control systems include, and will continue to include, a mix of standards based, vendor-based, and even project-based extensions.

OBIX extensibility is based on the principal that anything new...