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In this paper, we follow the role-based access control (RBAC) approach and extend it to provide for the dynamic association of roles with users. In our framework, privileges associated with resources are assigned depending on the attribute values of the resources, attribute values associated with users determine the association of users with privileges, and a location mapping function between physical and logical locations allows to enable/disable roles depending on the logical location of thedoi:10.1145/1463434.1463530 dblp:conf/gis/CruzGLO08 fatcat:wr37semmcjchhcpmmnzld66vte