In object-oriented programming, a metaclass is a class whose instances are classes. Just as an ordinary class defines the behavior of certain objects, a metaclass defines the behavior of certain classes and their instances. Not all object-oriented programming languages support metaclasses. Among those that do, the extent to which metaclasses can override any given aspect of class behavior varies. Each language has its own metaobject protocol, a set of rules that govern how objects, classes, and metaclasses interact. Often #REDIRECT [[NamespacesMetaClass]] are used as identifiers in Metaclasses, to distinguish different classes. ==Derive new object== To generate a new metaclass just right-click on the sourceclass (e.g., the Baseclass) and choose Derive new object. After this the class´s name can be changed in the bottom window ( [[Details]] )