($attr.attrName) macro extracts a value from a specified
attribute in the target entry rather than extracting a value from a field with the same
number in the target distinguished name (DN).
($attr.description) is replaced with the value of the
description attribute in the target entry. If there are multiple
values for the specified attribute, then multiple actualized DNs are produced for the
bind DN, and the first matching actualized DN is used.
($attr.attrName) macro expands only the attribute's value so that
you can extract values from the target DN and build relative distinguished names (RDNs)
with different attribute names and types. Because the
macro extracts only the attribute's value, you can combine it with a type other than
what is in the target DN.