In addition, object-oriented DBMS technology is being used to deliver graph databases, which are key to managing social networks and addressing other relationship-oriented Big data problems.

ISDG, an improved system dependence graph, is proposed in order to better describe relationships in object-oriented programs. ISDG solves the description problem of parameterized objects.

Based on a graph-model-database integration maintenance mode, with object-oriented technology, a maintenance system applied in the AC and DC system is developed in this thesis.