Local verification of global integrity constraints in distributed databases
SIGMOD '93 Proceedings of the 1993 ACM SIGMOD international conference on Management of data
Distributed link service in the Aquarelle project
HYPERTEXT '97 Proceedings of the eighth ACM conference on Hypertext
Referential integrity of links in open hypermedia systems
Proceedings of the ninth ACM conference on Hypertext and hypermedia : links, objects, time and space---structure in hypermedia systems: links, objects, time and space---structure in hypermedia systems
Consistent query answers in inconsistent databases
PODS '99 Proceedings of the eighteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
XLinkProxy: external linkbases with XLink
Proceedings of the 2002 ACM symposium on Document engineering
PAST: A Large-Scale, Persistent Peer-to-Peer Storage Utility
HOTOS '01 Proceedings of the Eighth Workshop on Hot Topics in Operating Systems
The Piazza peer data management project
ACM SIGMOD Record
The hyperion project: from data integration to data coordination
ACM SIGMOD Record
Efficiently Managing Context Information for Large-Scale Scenarios
PERCOM '05 Proceedings of the Third IEEE International Conference on Pervasive Computing and Communications
Benefits of Integrating Meta Data into a Context Model
PERCOMW '05 Proceedings of the Third IEEE International Conference on Pervasive Computing and Communications Workshops
ConQuer: efficient management of inconsistent databases
Proceedings of the 2005 ACM SIGMOD international conference on Management of data
OpenDHT: a public DHT service and its uses
Proceedings of the 2005 conference on Applications, technologies, architectures, and protocols for computer communications
NexusScout: an advanced location-based application on a distributed, open mediation platform
VLDB '03 Proceedings of the 29th international conference on Very large data bases - Volume 29
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References between objects in loosely coupled distributed information systems pose a problem. On the one hand, one tries to avoid referential inconsistencies like, e.g., dangling links in the WWW. On the other hand, using strict constraints as in databases may restrict the data providers severely. We present the solution to this problem that we developed for the Nexus system. The approach tolerates referential inconsistencies in the data while providing consistent query answers to users. For traversing references, we present a concept based on return references. This concept is especially suitable for infrequent object migrations and provides a good query performance. For scenarios where object migrations are frequent, we developed an alternative concept based on a distributed hash table.