Directory Server (LDAP) - Unique attributes

Unique attributes

The unique attributes function ensures that specified attributes always have unique values within a directory. These attributes can be specified in two entries only, cn=uniqueattribute,cn=localhost and cn=uniqueattribute,cn=IBMpolicies. Search results for unique attributes are unique for that server's database only. Search results that include results from referrals might not be unique.

Note:

Binary attributes, operational attributes, configuration attributes, and the objectclass attribute cannot be designated as unique.

Not all attributes can be specified as unique. To determine if an attribute can be specified as unique, use the ldapexop command:

For attributes that can be unique: ldapexop -op getattributes -attrType unique -matches true
For attributes that cannot be unique: ldapexop -op getattributes -attrType unique -matches false

For more information on unique attributes, see Manage unique attributes.