* The Class and Priority tabs are user-definable and can be configured for any attribute or user-defined attribute associated with the clashing elements or their owning hierarchy. (The names Priority and Class illustrate the typical configuration, and are used in this Online Guide for the tabs and for any form elements that display information derived from them.) It should be noted that the values of the attributes defined are stored against each clashing element in the Clash Manager database. This additional attribute information can be used in the Assign and Accept rules.