Querying Heterogeneous Information Sources Using Source Descriptions
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
A Peer-to-Peer Framework for Web Service Discovery with Ranking
ICWS '04 Proceedings of the IEEE International Conference on Web Services
Journal of Artificial Intelligence Research
HTN planning for Web Service composition using SHOP2
Web Semantics: Science, Services and Agents on the World Wide Web
Query-answering algorithms for information agents
AAAI'96 Proceedings of the thirteenth national conference on Artificial intelligence - Volume 1
DIANE: an integrated approach to automated service discovery, matchmaking and composition
Proceedings of the 16th international conference on World Wide Web
The NExT System: Towards True Dynamic Adaptations of Semantic Web Service Compositions
ESWC '07 Proceedings of the 4th European conference on The Semantic Web: Research and Applications
Knowledge Technologies-Based Multi-Agent System for Semantic Web Services Environments
ICAISC '08 Proceedings of the 9th international conference on Artificial Intelligence and Soft Computing
An ontology, intelligent agent-based framework for the provision of semantic web services
Expert Systems with Applications: An International Journal
International Journal of Electronic Commerce
Journal of Artificial Intelligence Research
Semantic Web Service Composition in Social Environments
ISWC '09 Proceedings of the 8th International Semantic Web Conference
A knowledge technologies-based multi-agent system for eGovernment environments
SOCASE'08 Proceedings of the 2008 AAMAS international conference on Service-oriented computing: agents, semantics, and engineering
Learning complex action models with quantifiers and logical implications
Artificial Intelligence
Applying fluent calculus for automated and dynamic semantic web service composition
Proceedings of the 1st International Conference on Intelligent Semantic Web-Services and Applications
Task-oriented user modeling method and its application to service navigation on the web
DASFAA'10 Proceedings of the 15th international conference on Database systems for advanced applications
Preference-based web service composition: a middle ground between execution and search
ISWC'10 Proceedings of the 9th international semantic web conference on The semantic web - Volume Part I
AI planning-based semantic web service composition
International Journal of Innovative Computing and Applications
Semantic services for information and management support in mass casualty incident scenarios
ServiceWave'10 Proceedings of the 2010 international conference on Towards a service-based internet
A hierarchical framework for composing nested web processes
ICSOC'06 Proceedings of the 4th international conference on Service-Oriented Computing
A hierarchical goal-based formalism and algorithm for single-agent planning
Proceedings of the 11th International Conference on Autonomous Agents and Multiagent Systems - Volume 2
The actor's view of automated planning and acting: A position paper
Artificial Intelligence
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Hierarchical task network (HTN) based planning techniques have been applied to the problem of composing Web Services, especially when described using the OWL-S service ontologies. Many of the existing Web Services are either exclusively information providing or crucially depend on information-providing services. Thus, many interesting service compositions involve collecting information either during execution or during the composition process itself. In this paper, we focus on the latter issue. In particular, we present ENQUIRER, an HTN-planning algorithm designed for planning domains in which the information about the initial state of the world may not be complete, but it is discoverable through plan-time information-gathering queries. We have shown that ENQUIRER is sound and complete, and derived several mathematical relationships among the amount of available information, the likelihood of the planner finding a plan, and the quality of the plan found. We have performed experimental tests that confirmed our theoretical results and that demonstrated how ENQUIRER can be used for Web Service composition.