3.2.1.3 TypeID
All messages are relative to a type. For example, the visual type has a SetContent message that can be sent to a visual instance. These can be thought of as "methods" in an object-oriented system. Types can have "static" messages, which are analogous to static methods in an object-oriented system. In fact, the Type ID is an Object ID in every manner, and static messages are messages whose subjects are not an instance, but rather the type ID itself.
Because Type IDs are Object IDs, the processing rules for Object IDs apply equally to Type IDs.