Definition of a mutual attribute referens attribute.

 Name for the element the c-struct.

 Compiled system type.

 Compiled offset in body.

 Compiled size, number of bytes.

 Bitmask for attribute properties.

 PWR_MASK_POINTER	Attribute is a pointer.
 PWR_MASK_ARRAY		Attribute is an array.
 PWR_MASK_STATE	        Value will not be loaded from develompent database.
 PWR_MASK_CONST	        Value is a constant.
 PWR_MASK_RTVIRTUAL	Attribute doesn't exist in runtime environment
 PWR_MASK_DEVBODYREF	Used for input and output attributes, where the
                        connection refers another object which is found
                        in the first attribute of type Objid in DevBody.
 PWR_MASK_OBJIDSELF     Contains the objects own objid. Used in timer attributes.
 PWR_MASK_NOEDIT        Value can't be changed in object editor.
 PWR_MASK_INVISIBLE     Attribute will not be displayed in object editor.
 PWR_MASK_REFDIRECT     If an AttrRef, should not give value pointed to.
 PWR_MASK_NOINVERT      Can't be inverted in plc editor.
 PWR_MASK_NOREMOVE      Can't be removed in plc editor.
 PWR_MASK_RTDBREF       Contains an rtdb reference.
 PWR_MASK_PRIVATE       Should not be interpreted by an object editor.

 If array, number of elements..

 Index of attribute within a body.