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Auflistung nach Autor:in "Agarwal, Sudhir"

1 - 4 von 4
  • Konferenzbeitrag
    Elicitation of preferences for web service compositions
    (INFORMATIK 2010. Service Science – Neue Perspektiven für die Informatik. Band 2, 2010) Michels, Carolin; Agarwal, Sudhir
    Preference elicitation is often used in e-services to create product recommendations for their customers. We present an approach for applying preference elicitation techniques for a semi-automatic query generation system for Web service compositions. These techniques are used for identifying the user's demands on the desired Web service composition and furthermore the trade-offs between interdependent or conflicting preferences. In our iterative process the query is automatically (re-)formulated to present results to the user, so that he can detect undesired characteristics and revise his specifications until he is presented a satisfiable result.
  • Konferenzbeitrag
    Ontology based specification of web service policies
    (Informatik 2004, Informatik verbindet, Band 2, Beiträge der 34. Jahrestagung der Gesellschaft für Informatik e.V. (GI), 2004) Grimm, Stephan; Lamparter, Steffen; Abecker, Andreas; Agarwal, Sudhir; Eberhart, Andreas
    An ever-growing number of XML-based languages are used to describe Web Service related issues such as security (WS-Security Policy), access control (XAC-ML), or privacy (P3P-WS). While it is desirable to specify policies in a declarative way, these languages expose great diversity in both syntax and semantics making it hard to realize a unified system. Our contribution to this problem is twofold. First, we present an expressive formal notation for policies. Second, we show how requester-, provider-, and third-party policies can be used for choosing a suitable service while making sure that all relevant policies are obeyed.
  • Konferenzbeitrag
    Process-based integration of heterogeneous information sources
    (Informatik 2004, Informatik verbindet, Band 2, Beiträge der 34. Jahrestagung der Gesellschaft für Informatik e.V. (GI), 2004) Agarwal, Sudhir; Haase, Peter
    The number of information sources in the Web is growing day by day with a tremendous speed. At the same time, users tend to manage more and more tasks electronically, thereby using publicly available information sources. Since the Web is an open, distributed and dynamic environment, in which information sources are offered and controlled autonomously and independently, the interoperability of available information is still a big challenge. In this paper, we present a process-based approach for integrating various information sources and illustrate our approach by an example. Our approach also allows dynamic and flexible integration of information sources provided by the users.
  • Konferenzbeitrag
    Semantic methods and tools for information portals
    (INFORMATIK 2003 – Innovative Informatikanwendungen, Band 1, Beiträge der 33. Jahrestagung der Gesellschaft für Informatik e.V. (GI), 2003) Agarwal, Sudhir; Fankhauser, Peter; Gonzalez-Ollala, Jorge; Hartmann, Jens; Hollfelder, Silvia; Jameson, Anthony; Klink, Stefan; Lehti, Patrick; Ley, Michael; Rabbidge, Emma; Schwarzkopf, Eric; Shrestha, Nitesh; Stojanovic, Nenad; Studer, Rudi; Stumme, Gerd; Walter, Bernd; Weber, Alexander
    The paper describes a set of approaches for representing and accessing information within a semantically structured information portal, while offering the possibility to integrate own information. It discusses research performed within the project 'Semantic Methods and Tools for Information Portals (SemI-Port)'. In particular, it focuses on (1) the development of scalable storing, processing and querying methods for semantic data, (2) visualization and browsing of complex data inventories, (3) personalization and agent-based interaction, and (4) the enhancement of web mining approaches for use within a semantics-based portal.