Very simply struct-like class to hold data that defines a Constraint Relation Set. A "set" of constraint relations implies that there may be more than one, but current FEI usage (as of FEI version 2.0) results in a "Set" always containing only one constraint relation. But it was deemed unnecessary to change the name of this class.
It should also be noted that this container can also be used to hold the definition for a "Slave variable" which is very similar to a constraint relation, except that one of the constrained degrees of freedom is designated as the "slave" -- it is defined to be a linear-combination of other degrees of freedom plus a right-hand-side value (often zero).
Definition at line 60 of file CRSet.hpp.