.B constraint_attribute <attribute_name>[,...] <type> <value> [<extra> [...]]
Specifies the constraint which should apply to the comma-separated
attribute list named as the first parameter.
-Two types of constraint are currently supported -
+Five types of constraint are currently supported -
.BR regex ,
.BR size ,
.BR count ,
.B title
attribute of any
.B titleCatalog
-entries in the given scope.
+entries in the given scope. (Note that the
+"dc=catalog,dc=example,dc=com" subtree ought to reside
+in a separate database, otherwise the initial set of
+titleCatalog entries could not be populated while the
+constraint is in effect.)
Finally, it requires the values of the attribute
.B cn
to be constructed by pairing values of the attributes