Active active cluster

Dear all,

I'm trying to figure out without any success in the official documentation wether SQL Server 2012/2014 supports active-active clustering or not.

I mean by active-active clustering having two RDBMS accessing the same database in a read-write fashion at the same time (like an Oracle RAC).

Do you have any clues concerning this question ? Any pointer to an official documentation saying something like: "yes, you can make load balancing in front of an SQL server cluster" (or the negation ;) )

Thank you,

Laurent