You reference rules in a library using an XPRESS <rule> expression. The value of the name attribute is formed by combining the name of the configuration object containing the library, followed by a colon, followed by the name of a rule within the library. Therefore, each rule name in a library must be unique.
For example, the following expression calls the rule named First Dot Last contained in a library named Account ID Rules:
<rule name=’Account ID Rules:First Dot Last’/>