An approximate index is used to match values that "sound like" those
provided in the filter. An approximate index on cn
allows clients to find people even when they misspell names as in the
following example.
$ ldapsearch --port 1389 --baseDN dc=example,dc=com "(cn~=Babs Jansen)" cn dn: uid=bjensen,ou=People,dc=example,dc=com cn: Barbara Jensen cn: Babs Jensen
