PQL*: An Extended Pictorial Query Language for Querying Geographical Databases using Positional and OLAP operators (Contributo in atti di convegno)

Type
Label
  • PQL*: An Extended Pictorial Query Language for Querying Geographical Databases using Positional and OLAP operators (Contributo in atti di convegno) (literal)
Anno
  • 1999-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1145/320134.320175 (literal)
Alternative label
  • POURABBAS E.; RAFANELLI M. (1999)
    PQL*: An Extended Pictorial Query Language for Querying Geographical Databases using Positional and OLAP operators
    in 7th ACM Symposium on Advances in Geographic Information Systems- ACM GIS'99, Kansas City, USA, Novembre 5-6, 1999
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • POURABBAS E.; RAFANELLI M. (literal)
Pagina inizio
  • 165 (literal)
Pagina fine
  • 166 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • GIS '99 Proceedings of the 7th ACM international symposium on Advances in geographic information systems (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 2 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Analisi dei Sistemi ed Informatica \"Antonio Ruberti\", Italy (literal)
Titolo
  • PQL*: An Extended Pictorial Query Language for Querying Geographical Databases using Positional and OLAP operators (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 1-58113-235-2 (literal)
Abstract
  • The authors propose a declarative Pictorial Query Language (PQL*) able to expresses queries on an Object-Oriented Geographic database (GDB) drawing the features which form the query. These features refer to the classic ones of a GDB (geopoints, geo-polyline, and geo-region) and define the alphabet of the above mentioned language. This language uses, in addition to the classic operators (topologic and metric), also the positional operators with a set of relative specification. These specifications, for example, concerning the at_North_of operator, are: Completely at_North_of, Only at_North_of, Partially at_North_of, and Also at_North_of. Also the possibility to use multidimensional data, stored in a Multidimensional Database (MDDB), is discussed. The links between the two environments by means of geographic dimension that can be present in a data cube using OLAP operators are defined. (literal)
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