An internal class is a concrete class (instance of the Rule-Obj-Class rule type) for which instances are stored in the PegaRULES database, rather than in an external database. The two properties @baseclass.pzInsKey and @baseclass.pxObjClass are defined for every internal class. In a saved (persistent) instance of an internal class, on the clipboard page that has an associated class, the value of the pyObjClass property records the class of the current object.