Information gathering during planning for Web Service composition

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-provid...

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Published inWeb semantics Vol. 3; no. 2; pp. 183 - 205
Main Authors Kuter, Ugur, Sirin, Evren, Parsia, Bijan, Nau, Dana, Hendler, James
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2005
Subjects
HTN planning
Information gathering
Web Service composition
HTN planning
Information gathering
Web Service composition
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Abstract 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.
AbstractList 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.
Author Parsia, Bijan
Kuter, Ugur
Sirin, Evren
Nau, Dana
Hendler, James
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Cites_doi 10.1038/scientificamerican0501-34
10.1613/jair.1141
10.1016/j.websem.2004.06.005
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Information gathering
Web Service composition
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Snippet Hierarchical task network (HTN) based planning techniques have been applied to the problem of composing Web Services, especially when described using the OWL-S...
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SubjectTerms HTN planning
Information gathering
Web Service composition
Title Information gathering during planning for Web Service composition
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