  A Vogan superdiagram is a set of involution and painting on a Dynkin diagram.
It selects a real form, or equivalently an involution, from a complex simple
Lie superalgebra. We introduce the double Vogan superdiagram, which is two sets
of Vogan superdiagrams superimposed on an affine Dynkin diagram. They
correspond to pairs of commuting involutions on complex simple Lie
superalgebras, and therefore provide an independent classification of the
simple locally symmetric or symmetric superpairs.
