READ : Allow user to view this File
CREATE : Allow user to create new resource below this File
UPDATE : Allow user to edit this File
DELETE : Allow user to delete this File

Resource has permissions :	READ	CREATE	UPDATE	DELETE	Action
ls://dev.artenum.com/projects/helios/project-managers					Edit -  Delete -  (recursive)
ls://dev.artenum.com/groups/projects-manager					Edit -  Delete -  (recursive)
ls://dev.artenum.com/groups/manager					Edit -  Delete -  (recursive)
ls://dev.artenum.com/groups/reader					Edit -  Delete -  (recursive)
ls://dev.artenum.com/groups/projects-reader					Edit -  Delete -  (recursive)
ls://dev.artenum.com/users/guest					Edit -  Delete -  (recursive)
ls://dev.artenum.com/groups/developers					Edit -  Delete -  (recursive)
ls://dev.artenum.com/projects/helios/project-members					Edit -  Delete -  (recursive)

    (owner has all permissions)