1Demeter L K J. http://www. ccs. neu. edu/research/demeter/index. html.
2Lieberherr K J,Silva-Lepe I,Xiao C. Adaptive object-oriented programming using graph-based customization. CACM,May 1994,37(5): 94～101.
3Harrison W H,Ossher H L,Tarr P L. Asymmetrically vs. Symmetrically Organized Paradigms for Software Composition. IBM Watson Research Center RC22685 (W0212-147),Dec. 2002.
4Aldrich J. Challenge Problems for Separation of Concerns. In:Proc. of the OOPSLA 2000 Workshop on Advanced Separation of Concerns ,Oct. 2000?A.
5Dijkstra E W. A Discipline of Programming. Prentice Hall,Englewood Cliffs ,NJ, 1976.?A
7Tarr P,Ossher H,Harriso W,et al. N degree of separation: Multidimensional Separation of concerns. In: proc. of the 21st Intl.Conf. on Software Engineering,May 1999. 107～119.
8IEEE. IEEE Recommended Practice for Architectural Description of Software-Intensive Systems. IEEE Std 1471-2000. Approved 21 Sep. 2000.4.
9Sutton S M Jr, Rouvellou I. Modeling of Software Concerns in Cosmos. In: 1st Intl. Conf. on aspect-Oriented Software Development,Enschede,The Netherlands,April,2002. 127～133.
