Abstract: A computer network and methods are provided for granting and revoking access privileges for an information source of the computer network. The computer network also comprises an Access Control List (ACL) for the information source, listing authorized users of the information source together with their access privileges, and means for generating a reference to the information source. The computer network is characterized by means for adding access privileges to the reference and means for passing the resulting enhanced reference to another user of the network and, thus, providing the receiving user with the access privileges passed. Furthermore, the computer network comprises means for automatically generating a Reference Passing Tree (RPT) for the information source by automatically storing the identification of the user sending the enhanced reference, the identification of the user receiving the enhanced reference and the access privileges provided by the enhanced reference.

Abstract: A computer network and methods are provided for granting and revoking access privileges for an information source of the computer network. The computer network also comprises an Access Control List (ACL) for the information source, listing authorized users of the information source together with their access privileges, and means for generating a reference to the information source. The computer network is characterized by means for adding access privileges to the reference and means for passing the resulting enhanced reference to another user of the network and, thus, providing the receiving user with the access privileges passed. Furthermore, the computer network comprises means for automatically generating a Reference Passing Tree (RPT) for the information source by automatically storing the identification of the user sending the enhanced reference, the identification of the user receiving the enhanced reference and the access privileges provided by the enhanced reference.

Abstract: An improved method for consistent updates of redundant data in a database is achieved advantageously by providing a dependency model identifying source fields and respective derived fields. The model having the necessary information for dependent data to be identified and calculated on a change of respective source data according to some predetermined rules. Further, by recording changes, i.e., modifications to data involved in a redundancy, and propagating changes including cascaded changes directed to the derived fields using the rules defied in said dependency model. Advantageously, the dependency model is stored as a database table (2) and the changes are recorded in a change table in the database. The step of recording changes is separated from the step of propagating changes to derived fields in order to improve performance.

Abstract: A programming interface for converting network management application programs written in an object-oriented language into network communication protocols. The application programs manipulate managed objects specified according to GDMO/ASN.1 ISO standards. Methods are provided for mapping from GDMO templates and ASN.1 defined types into C++ programming language. The interface has both an object interface composing means for generating code which provides proxy managed object classes as local representatives for managed object classes, and a run time system means for providing proxy agent object classes as representatives for remote agents.

Abstract: A programming interface for converting network management application programs written in an object-oriented language into network communication protocols. The application programs manipulate managed objects specified according to GDMO/ASN.1 ISO standards. Methods are provided for mapping from GDMO templates and ASN.1 defined types into C++ programming language. The interface has both an object interface composing means for generating code which provides proxy managed object classes as local representatives for managed object classes, and a run time system means for providing proxy agent object classes as representatives for remote agents.

Abstract: A computer network, having at least three nodes for implementing predetermined functions, comprises an OBJECT PASSING AGENT (OPA) storing the access authorizations of the individual nodes relative to each other. By means of calls (passing, returned), the stored access authorizations may be modified. With the aid of a further call (inquire), access authorizations may be verified. The desired access authorizations are defined by the user in the interface descriptions of the individual nodes. These descriptions are used by a compiler to generate the previously mentioned calls for modifying or verifying access authorizations. To permit a node to access the function of another node, an access authorization to that effect (passing) is stored in OPA. Prior to implementation, each access is verified (inquire). Upon completion of the access, the access authorization in OPA is erased (returned). These calls are handled automatically, ensuring that node access operations are readily implemented.