OID value: 2.5.4.50
OID description:
The Unique Member
attribute type specifies
a group of unique names associated with an object.
A unique name is a name that is optionally disambiguated
by the inclusion of its unique identifier.
An attribute value for Unique Member is a distinguished name accompanied by an optional unique identifier.
uniqueMember ATTRIBUTE ::= { WITH SYNTAX NameAndOptionalUID EQUALITY MATCHING RULE uniqueMemberMatch ID id-at-uniqueMember } NameAndOptionalUID ::= SEQUENCE { dn DistinguishedName, uid UniqueIdentifier OPTIONAL }
See also the OID Repository website reference for 2.5.4.50