Abstract
We propose an architecture for Digital Library repositories where one or more data stores persistently hold the digital objects (e.g., documents), and interact with clients that perform indexing, replication, intellectual property management, revenue management, and other functions. One of the most critical components in such stores is the awareness mechanism, used to notify clients of inserted, deleted or changed objects. In this paper we survey the various awareness schemes (including snapshot, timestamp and log based), describing them all as variations of a single unified scheme. This makes it possible to understand their relative differences and strengths. In particular we focus on a signature-based awareness scheme that we believe is especially well suited for digital libraries, and show enhancements to improve its performance.
This is a preview of subscription content, log in via an institution.
Preview
Unable to display preview. Download preview PDF.
References
M.E. Adiba, and B.G. Lindsay: Database Snapshots. In Proceedings of the International Conference on Very Large Databases, 1980.
William Arms: Key Concepts in the Architecture of the Digital Library. D-Lib Magazine, July 1995. At http://www.cnri.reston.va.us/home/dlib/July95/07arms.html.
BackWeb. At http://www.backweb.com/.
Marthyn Borghuis, Hans Brinckman, Albert Fischer, Karen Hunter, Eleonore van der Loo, Rob ter Mors, Paul Mostert, and Jaco Zijlstra: TULIP. Final Report. Elsevier Science, July 1996.
D. Barbara and R.J. Lipton: A class of randomized strategies for low-cost comparison of file copies. In IEEE Transactions on Parallel and Distributed Systems, volume 2(2), pages 160–170. April 1991.
Corporation for National Research Initiatives: Computer Science Technical Reports (CS-TR). At http://www.cnri.reston.va.us/home/cstr.html.
Robert Kahn and Robert Wilensky: A Framework for Distributed Digital Object Services. Technical Report tn95-01. CNRI, May 1995.
G. G. Langdon: A Note on the Ziv-Lempel Model for Compressing Individual Sequences. In IEEE Transactions on Information Theory, volume 29(2), pages 284–287, 1983.
B.G. Lindsay et al.: A Snapshot Differential Refresh Algorithm. In Proceedings of the ACM SIGMOD Annual Conference, 1986.
Wilburt Juan Labio and Hector Garcia-Molina: Efficient Snapshot Differential Algorithms for Data Warehousing. In VLDB, 1996.
Carl Lagoze, Clifford A. Lynch, and Ron Daniel Jr.: The Warwick Framework: A Container Architecture for Aggregating Sets of Metadata. Technical Report TR961593. Cornell University, June 1996.
MARIMBA: Castanet. At http://www.maiimba.com.
J.J. Metzner: Efficient replicated remote file comparison. In IEEE Transactions on Computers, volume 40(5), pages 651–660. May 1991.
Open Software Associates: NetDeploy. At http://www.osa.com/products/netdploy Graw Hill, 1996.
A. Silberschtaz and H. F. Korth and S. Sudarshan: Database System Concepts. Mc Mc Graw Hill, 1996.
Stuart Weibel, Jean Godby, Eric Miller, and Ron Daniel: OCLC/NCSA Metadata Workshop Report, March 1995.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1997 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Crespo, A., Garcia-Molina, H. (1997). Awareness services for digital libraries. In: Peters, C., Thanos, C. (eds) Research and Advanced Technology for Digital Libraries. ECDL 1997. Lecture Notes in Computer Science, vol 1324. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0026727
Download citation
DOI: https://doi.org/10.1007/BFb0026727
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-63554-3
Online ISBN: 978-3-540-69597-4
eBook Packages: Springer Book Archive