“…Recently, more and more papers that apply roles have been published. Roles are paid more and more attention in different areas relevant to information systems such as modeling [4, 8, 10, 35-39, 47, 49, 50, 56, 67-70, 72-73, 75-77], software design [25,45,47,56,69,88,97], access control [2, 3, 12, 22, 31-33, 46, 65, 76], system administration [54,61,75], agent systems [11, 18-20, 28, 30, 59, 60, 66, 84], database systems [21,62,71], and Computer-Supported Cooperative Work (CSCW) systems [9,29,40,52,74,87,92,94,96].…”