Type identity. Basic type.

 Every type has a unique identity, derived from the classvolume
 identity and the type index.

 A type is described by a typedefinition object in a class volume. This
 objects has a specific object identity, which is specified by the vid, tyg
 and tix.

 The figure above describes an objid for typedefinition objects. The black fields
 must have the values specified in the figure, the gray fields are reserved
 for future use.

vid

 The volume identity of the class volume where the class i defined. Only the
 two lower entities of the volume identity can be used.

tyg

 The type group. The groups of typedefinition objects are:
   0     Basic types, i.e. types defined with a $Type object.
   1     Derived types, i.e. types defined with a $TypeDef object.
   2-15  Reserved for future use.

tix

 The index of a type within a classvolume. The tix consists of 11 bits, which
 implies that each group in a class volume can have types with index in the
 interval [1,2047]

TypeId

 The typeid is a 32-bit reduction of the 64-bit object identity of the
 Type or TypeDef object for the type. It contains the vid, tyg and tix of the type.

 If the type is a class, the typeid contains the vid, cix and bix for the class.
 So far the bix is always 1, only an RtBody or SysBody can be a type.

c-binding

 The classid is defined with a #define statement of type pwr_t
 in the struct file for the the classvolume.
 For system types, these definitions reside in pwr.h.