A QUERY RESOLUTION ENGINE TO HANDLE A PATH OPERATOR WITH MULTIPLE PATHS

An end-user query of a Geographical Information System (GIS) can formally be defined as the application of a set of operators. GIS used for Transportation must provide a path evaluation operator. This composition of operators and the fact that the evaluation of a path may not provide a unique result impose the definition of a query resolution model (QRM) or a database query language able to support this composition. In this paper, a QRM is presented. The use of multi-criteria analysis and the definition of aggregates in a query may involve ambiguities in the final presentation of results to an end-user. The formal modeling of query results must take this risk into account. The philosophies of a query definition and the presentation of the results may be different. The management of query results must take into account the data model associated with the query results, the results themselves, and the interpretation. The interpretation avoids errors due to visual ambiguities of an operator with an aggregate function.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0968090X
• Corporate Authors:

  Elsevier

  The Boulevard, Langford Lane
  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • Mainguenaud, M
• Publication Date: 2000-2

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 109-127
• Serial:
  • Transportation Research Part C: Emerging Technologies
  • Volume: 8
  • Issue Number: 1
  • Publisher: Elsevier
  • ISSN: 0968-090X
  • Serial URL: http://www.sciencedirect.com/science/journal/0968090X

Subject/Index Terms

• TRT Terms: Computer output; Databases; Geographic information systems; Transportation; Transportation planning
• Uncontrolled Terms: Path management; Queries; Query resolution models
• Subject Areas: Planning and Forecasting; Transportation (General); I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00800321
• Record Type: Publication
• Files: TRIS, ATRI
• Created Date: Oct 3 2000 12:00AM