Abstract: A method, system, and collaborative user interface for creating a collaborative environment for users to work on shared resources on a computer network. Each resource is capable of being subdivided into sub-resources in a hierarchical manner, and each sub-resource is treated in a transactional way in the sphere of control to which it is delegated/copied, which ensures proper treatment with respect to the resource from which it originated. The method thus provides a powerful management system allowing a number of people to work simultaneously on various parts of the shared resources.