We have been approached by this initiative which might be of interest to the OSI w/g. It aims to establish an open source community to build an interface that facilitates standardized interchange between intermediate and end users of Earth Observation (EO) data provided by cloud services. For more details please see the blog written by Edzer Pebesma et al.: http://r-spatial.org/2016/11/29/openeo.html
Please let us know any comment that you may have on the concept and design of this interface.