A rapid hierarchical radiosity algorithm
Proceedings of the 18th annual conference on Computer graphics and interactive techniques
Control principles and role hierarchies
RBAC '98 Proceedings of the third ACM workshop on Role-based access control
Exception Handling in Workflow Management Systems
IEEE Transactions on Software Engineering - special section on current trends in exception handling—part II
A Transactional Nested Process Management System
ICDE '96 Proceedings of the Twelfth International Conference on Data Engineering
Extending SQL's Grant and Revoke Operations, to Limit and Reactivate Privileges
Proceedings of the IFIP TC11/ WG11.3 Fourteenth Annual Working Conference on Database Security: Data and Application Security, Development and Directions
ATAL '01 Revised Papers from the 8th International Workshop on Intelligent Agents VIII
Modeling Supply-Chain Networks by a Multi-Agent System
HICSS '98 Proceedings of the Thirty-First Annual Hawaii International Conference on System Sciences-Volume 5 - Volume 5
Exploiting Temporal and Spatial Coherence in Hierarchical Visibility Algorithms
SCCG '01 Proceedings of the 17th Spring conference on Computer graphics
Aspect-Oriented Programming is Quantification and Obliviousness
Aspect-Oriented Programming is Quantification and Obliviousness
The Hierarchical Degree-of-Visibility Tree
IEEE Transactions on Knowledge and Data Engineering
Abstract hierarchical graph transformation
Mathematical Structures in Computer Science
ECOWS '05 Proceedings of the Third European Conference on Web Services
HASE '08 Proceedings of the 2008 11th IEEE High Assurance Systems Engineering Symposium
Data processing spheres of control
IBM Systems Journal
A multi-level model for activity commitments in e-contracts
OTM'07 Proceedings of the 2007 OTM Confederated international conference on On the move to meaningful internet systems: CoopIS, DOA, ODBASE, GADA, and IS - Volume Part I
A highly flexible data structure for multi-level visibility of P2P communities
ICDCN'08 Proceedings of the 9th international conference on Distributed computing and networking
Modeling visibility in hierarchical systems
ER'06 Proceedings of the 25th international conference on Conceptual Modeling
Research on shared resource management of integrated avionics processing system
IITA'09 Proceedings of the 3rd international conference on Intelligent information technology application
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We consider hierarchical systems where nodes represent entities and edges represent binary relationships among them. An example is a hierarchical composition of Web services where the nodes denote services and the edges represent the parent-child relationship of a service invoking another service. A fundamental issue to address in such systems is, for two nodes X and Y in the hierarchy, whether X can see Y, that is, whether X has visibility over Y. The visibility could be with respect to certain attributes like operational details, execution logs and security related issues. In a general setting, X seeing Y may depend on (i) X wishing to see Y, (ii) Y wishing to be seen by X, and (iii) other nodes not objecting to X seeing Y. In this paper, we develop a generic conceptual model to express visibility. We study two complementary notions: sphere of visibility of a node X that includes all the nodes in the hierarchy that X can see; and sphere of noticeability of X that includes all the nodes that can see X. We also identify dual properties, coherence and correlation, that relate the spheres of different nodes in special ways and also relate the visibility and noticeability notions. We study some variants of coherence and correlation also. These properties give rise to interesting and useful visibility and noticeability assignments, and their representations.