Intelligent integration of information
SIGMOD '93 Proceedings of the 1993 ACM SIGMOD international conference on Management of data
LORE: a Lightweight Object REpository for semistructured data
SIGMOD '96 Proceedings of the 1996 ACM SIGMOD international conference on Management of data
METU interoperable database system
SIGMOD '96 Proceedings of the 1996 ACM SIGMOD international conference on Management of data
SIGMOD '96 Proceedings of the 1996 ACM SIGMOD international conference on Management of data
Scrambling query plans to cope with unexpected delays
DIS '96 Proceedings of the fourth international conference on on Parallel and distributed information systems
Scaling heterogeneous databases and the design of Disco
ICDCS '96 Proceedings of the 16th International Conference on Distributed Computing Systems (ICDCS '96)
SIGMOD '98 Proceedings of the 1998 ACM SIGMOD international conference on Management of data
Providing database-like access to the Web using queries based on textual similarity
SIGMOD '98 Proceedings of the 1998 ACM SIGMOD international conference on Management of data
Recognizing structure in Web pages using similarity queries
AAAI '99/IAAI '99 Proceedings of the sixteenth national conference on Artificial intelligence and the eleventh Innovative applications of artificial intelligence conference innovative applications of artificial intelligence
Data integration using similarity joins and a word-based information representation language
ACM Transactions on Information Systems (TOIS)
PathLog: a query language for schemaless databases of partially labeled objects
Fundamenta Informaticae
Reasoning about Textual Similarity in a Web-Based Information Access System
Autonomous Agents and Multi-Agent Systems
Scaling Access to Heterogeneous Data Sources with DISCO
IEEE Transactions on Knowledge and Data Engineering
Supporting Dynamic Interactions among Web-Based Information Sources
IEEE Transactions on Knowledge and Data Engineering
An Information Store and Retrieval Facility on CORBA
WAIM '00 Proceedings of the First International Conference on Web-Age Information Management
A Closed Approach to Vague Collections in Partly Inaccessible Distributed Databases
ADBIS '99 Proceedings of the Third East European Conference on Advances in Databases and Information Systems
XML-SQL: An XML Query Language Based on SQL and Path Tables
EDBT '02 Proceedings of the Worshops XMLDM, MDDE, and YRWS on XML-Based Data Management and Multimedia Engineering-Revised Papers
Adaptive web-based database communities
Information modeling for internet applications
Information integration: A new generation of information technology
IBM Systems Journal
A SAT Approach to Query Optimization in Mediator Systems
Annals of Mathematics and Artificial Intelligence
ACM Computing Surveys (CSUR)
A schema and ontology-aided intelligent information integration
Expert Systems with Applications: An International Journal
An efficient query evaluation in a mediator based on implementation plan
Information Sciences: an International Journal
PathLog: a Query Language for Schemaless Databases of Partially Labeled Objects
Fundamenta Informaticae
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The Distributed Information Search COmponent (DISCO) is a prototype heterogeneous distributed database that accesses underlying data sources. The DISCO prototype currently focuses on three central research problems in the context of these systems. First, since the capabilities of each data source is different, transforming queries into subqueries on data source is difficult. We call this problem the weak data source problem. Second, since each data source performs operations in a generally unique way, the cost for performing an operation may vary radically from one wrapper to another. We call this problem the radical cost problem. Finally, existing systems behave rudely when attempting to access an unavailable data source. We call this problem the ungraceful failure problem.DISCO copes with these problems. For the weak data source problem, the database implementor defines precisely the capabilities of each data source. For the radical cost problem, the database implementor (optionally) defines cost information for some of the operations of a data source. The mediator uses this cost information to improve its cost model. To deal with ungraceful failures, queries return partial answers. A partial answer contains the part of the final answer to the query that was produced by the available data sources. The current working prototype of DISCO contains implementations of these solutions and operations over a collection of wrappers that access information both in files and on the World Wide Web.