DRL rules are business rules that you define directly in .drl text files. These DRL files are the source in which all other rule assets in Decision Central are ultimately rendered. You can create and manage DRL files within the Decision Central interface, or create them externally using Red Hat Developer Studio, Java objects, or Maven archetypes. A DRL file can contain one or more rules that define at minimum the rule conditions (when) and actions (then). The DRL designer in Decision Central provides syntax highlighting for Java, DRL, and XML.

All data objects related to a DRL rule must be in the same project package as the DRL rule in Decision Central. Assets in the same package are imported by default. Existing assets in other packages can be imported with the DRL rule.