Vague Queries in Tourism Information Systems

  • J. Palkoska
  • A. Dunzendorfer
  • J. Küng


The vague Query System (VQS) allows to efficiently carry out rankings for user defined queries according to the semantic meta-information of attributes. It can easily be added to existing relational database systems. In this article we demonstrate the applicability of the system on Tourism Information Systems (TI-systems). We will show that for cases where the structure of the existing database is not directly suited for the use with VQS, we can achieve compatibility by using views. Furthermore we will show a concept for integrating VQS into the query language TIS-QL, in order to achieve an even tighter integration into TI-systems.


Relational Database Query Language Query Condition Tight Integration Relational Database System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    J. Küng, J. Palkoska: “VQS-A Vague Query System Prototype”, Proceedings of the Eight International Workshop on Database and Expert Systems Applications, DEXA 97, Toulouse, France, September 1-2, IEEE Computer Society Press, 1997, pp. 614–618CrossRefGoogle Scholar
  2. 2.
    T. Ichikawa, M. Hirakawa: “ARES: A Relational Database with the Capability of Performing Flexible Interpretation of Queries”, IEEE Transactions on Software Engineering, Vol. 12, No. 5,1986, pp. 624–634Google Scholar
  3. 3.
    A. Motro: “VAGUE: A User Interface to Relational Databases that Permits Vague Queries”, ACM Transactions on Office Information Systems, Vol. 6, No. 3,1988, pp. 187–214CrossRefGoogle Scholar
  4. 4.
    Database Preference Software GmbH; Preference SQL 1.2 technical white paper: white paper.pdf, 1999Google Scholar
  5. 5.
    J. Küng, J. Palkoska: “An Incremental Hypercube Approach for Finding Best Matches for Vague Queries”, Tenth International Conference on Database and Expert Systems Applications, DEXA 99, Florence, Italy, August 30-September 1, Springer 1999, pp. 238–249CrossRefGoogle Scholar
  6. 6.
    Josef Küng, Anton Dunzendorfer, Roland Wagner: “TIS-QL — A Unified Query Language for Tourism Information Systems”; in Werthner H. (Ed.): Information Technology & Tourism. Applications. Methodologies. Techniques; Cognizant Communication Corp., Vol. 1., ISSN 1098-3058, New York — Sydney — Tokyo 1998, pp. 73–82Google Scholar
  7. 7.
    J. Küng, A. Dunzendorfer, R. R. Wagner: “A General Datamodel for Tourism Information Systems”; in Buhalis D., Schertler W.(ads): Information and Communication Technologies in Tourism 1999, Springer Computer Science, Wien 1999, pp. 151–160Google Scholar

Copyright information

© Springer-Verlag Wien 2000

Authors and Affiliations

  • J. Palkoska
    • 1
  • A. Dunzendorfer
    • 1
  • J. Küng
    • 1
  1. 1.Institute for Applied Knowledge Processing (FAW)University of LinzLinzAustria

Personalised recommendations