Does SL (i.e., TUV EL) have a standard enterprise-quality production 
REST API that will interoperate with non-EL "clouds"?

The most I could find on a short search is:

http://developerblog.redhat.com/2013/12/12/advanced_integration_rhevm-part1/

Advanced integration with Red Hat Enterprise Virtualization Manager 
(RHEV-M) – Part 1 of 2

and

https://fedorahosted.org/rhevm-api/

This is an effort to define an official REST API for Red Hat Enterprise 
Virtualization <http://www.redhat.com/virtualization/rhev/>.

but that the fedorahosted project above is obsolete, replaced by:

http://www.ovirt.org/Subprojects

in which any mention of TUV by name is in the title of each reference.

Yasha Karant