Federated database systems for managing distributed, heterogeneous, and autonomous databases
ACM Computing Surveys (CSUR) - Special issue on heterogeneous databases
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ACL '03 Proceedings of the 41st Annual Meeting on Association for Computational Linguistics - Volume 1
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ACM SIGMOD Record
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Scientific Programming
Query and update efficient B+-tree based indexing of moving objects
VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
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Proceedings of the 16th ACM SIGSPATIAL international conference on Advances in geographic information systems
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IAAI'04 Proceedings of the 16th conference on Innovative applications of artifical intelligence
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GRID '08 Proceedings of the 2008 9th IEEE/ACM International Conference on Grid Computing
IAAI'07 Proceedings of the 19th national conference on Innovative applications of artificial intelligence - Volume 2
Keyword search support for automating scientific workflow composition
SSDBM'11 Proceedings of the 23rd international conference on Scientific and statistical database management
An approach towards automatic workflow composition through information retrieval
Proceedings of the 15th Symposium on International Database Engineering & Applications
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Technological success has ushered in massive amounts of data for scientific analysis. To enable effective utilization of these data sets for all classes of users, supporting intuitive data access and manipulation interfaces is crucial. This paper describes an autonomous scientific workflow system that enables high-level, natural language based, queries over low-level data sets. Our technique involves a combination of natural language processing, metadata indexing, and a semantically-aware workflow composition engine which dynamically constructs workflows for answering queries based on service and data availability. A specific contribution of this work is a metadata registration scheme that allows for a unified index of heterogeneous metadata formats and service annotations. Our approach thus avoids a standardized format for storing all data sets or the implementation of a federated, mediator-based, querying framework. We have evaluated our system using a case study from the geospatial domain to show functional results. Our evaluation supports the potential benefits which our approach can offer to scientific workflow systems and other domain-specific, data intensive applications.