Data model and query evaluation in global information systems
Journal of Intelligent Information Systems - Special issue: networked information discovery and retrieval
Logical foundations of object-oriented and frame-based languages
Journal of the ACM (JACM)
Answering recursive queries using views
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Logic-based techniques in data integration
Logic-based artificial intelligence
Building Large Knowledge-Based Systems; Representation and Inference in the Cyc Project
Building Large Knowledge-Based Systems; Representation and Inference in the Cyc Project
Creating Semantic Web Contents with Protégé-2000
IEEE Intelligent Systems
TRIPLE - A Query, Inference, and Transformation Language for the Semantic Web
ISWC '02 Proceedings of the First International Semantic Web Conference on The Semantic Web
Answering queries using views: A survey
The VLDB Journal — The International Journal on Very Large Data Bases
An intelligent assistant for interactive workflow composition
Proceedings of the 9th international conference on Intelligent user interfaces
Automatically Composed Workflows for Grid Environments
IEEE Intelligent Systems
Argos: an ontology and web service composition infrastructure for goods movement analysis
dg.o '04 Proceedings of the 2004 annual national conference on Digital government research
Total-order planning with partially ordered subtasks
IJCAI'01 Proceedings of the 17th international joint conference on Artificial intelligence - Volume 1
HTN planning for Web Service composition using SHOP2
Web Semantics: Science, Services and Agents on the World Wide Web
Argos: dynamic composition of web services for goods movement analysis and planning
dg.o '05 Proceedings of the 2005 national conference on Digital government research
Argos: dynamic composition of web services for goods movement analysis and planning
dg.o '06 Proceedings of the 2006 international conference on Digital government research
Classification of the state-of-the-art dynamic web services composition techniques
International Journal of Web and Grid Services
A reference model for dynamic web service composition systems
International Journal of Web and Grid Services
A novel graph based approach for automatic composition of high quality grid workflows
Proceedings of the 18th ACM international symposium on High performance distributed computing
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Many scientific problems can be modeled as computational workflows that integrate data from heterogeneous sources and process such data to derive new results. These data analysis problems are pervasive in the physical and social sciences, as well as in government practice. In this paper, we present an approach to automatically create computational workflows in response to user data requests. We represent both data access and data processing operations uniformly as web services. We describe the inputs and outputs of the services according to an ontology of the application domain expressed in RDF/RDFS. Our system uses the Triple logic engine to formally represent the ontology and the services, and to automatically generate the workflows.This work is part of the Argos project that is developing a flexible data query and analysis system based on the web services paradigm. Our application domain is goods movement analysis and its effects on spatial urban structure. Since our ontology represents data items as multi-dimensional objects, with hierarchical values for each dimension, in this paper we focus on automatically generating workflows that include aggregation operations.