Another unique feature is the partnership with United with reciprocal recognition of elite levels. (dreamtravelonpoints.com)
Although there is no such thing as an international copyright, many countries have signed treaties that provide reciprocal recognition of copyrights. (ingramspark.com)
I think of it as taking a lesson from airlines with codeshares, but with better reciprocal recognition. (viewfromthewing.boardingarea.com)