The temporal query language TQuel
ACM Transactions on Database Systems (TODS)
A temporal relational model and a query language
Information Sciences: an International Journal
A query language and optimization techniques for unstructured data
SIGMOD '96 Proceedings of the 1996 ACM SIGMOD international conference on Management of data
Catching the boat with Strudel: experiences with a Web-site management system
SIGMOD '98 Proceedings of the 1998 ACM SIGMOD international conference on Management of data
Applications of a Web query language
Selected papers from the sixth international conference on World Wide Web
Database techniques for the World-Wide Web: a survey
ACM SIGMOD Record
On a Declarative Semantics for Web Queries
DOOD '97 Proceedings of the 5th International Conference on Deductive and Object-Oriented Databases
The Historical Relational Data Model (HRDM) and Algebra Based on Lifespans
Proceedings of the Third International Conference on Data Engineering
WebOQL: Restructuring Documents, Databases, and Webs
ICDE '98 Proceedings of the Fourteenth International Conference on Data Engineering
VLDB '97 Proceedings of the 23rd International Conference on Very Large Data Bases
W3QS: A Query System for the World-Wide Web
VLDB '95 Proceedings of the 21th International Conference on Very Large Data Bases
Web Warehousing: An Algebra for Web Information
ADL '98 Proceedings of the Advances in Digital Libraries Conference
A Declarative Language for Querying and Restructuring the Web
RIDE '96 Proceedings of the 6th International Workshop on Research Issues in Data Engineering (RIDE '96) Interoperability of Nontraditional Database Systems
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In this paper, we present the storage management of the WHOWEDA web warehousing system, which warehouses historical web information. To facilitate inter-table and intra-table sharing of web pages, we propose a three-layer storage architecture, that consists of tuple, table, and pool layers of storage modules storing different part of warehoused web information. To improve retrieval efficiency, we have chosen to replicate some mode attributes across web tables in the table layer while keeping only unique copies of web pages at the pool layer. The separation of table and pool layer storage also allows different valid times to be maintained by multiple web tables for the same web pages due to different schedules of global coupling across web tables. As the sharing of web pages may lead to valid time inconsistency between different web tables, we propose an update synchronization scheme to resolve the valid time differences on user request.