DPC = {DOC, MIDDLEWARE, PROCESSORS《bag PROCESSOR》} (1)
DOC = {ROOT, ASSIST_INFO} (2)
PROCESSOR = { APPS《bag APP》} (3)
ROOT = {NONLEAF《bag COMPOSITE _OBJ》, LEAF《bag BASIC _OBJ》} (4)
COMPOSITE_OBJ = {OBJECT, DESCENDANT《bag ROOT》} (5)
BASIC_OBJ = {OBJECT} (6)
OBJECT = {NAME, ACCESS_PATH, ON_EDITING} (7)
ON_EDITING :: = Busy | Idle (8)
Table 2: DPC model defined eight formulas.