AQL: A relational data base management system and its geographical applications

  • F. Antonacci
  • L. Bartolo
  • P. Dell' Orco
  • V. N. Spadavecchia
5. Data Base Research
Part of the Lecture Notes in Computer Science book series (LNCS, volume 81)


AQL (acronym for: A Query Language) is a Data Base management system based on n-ary relational model. It has been designed to help the nonspecialist in data processing in solving interactively unstructured problems, in building applications, in running simulations. A rich pattern of default options, synonyms, attribute definitions, inference and a menu facility provide an easy-to-use interface which combines data extraction facility and computational capabilities of the host programming language (i.e. APL). The extension of such a system to cover the geographic data requires extensions in both the conceptual schema and the language to represent and express concepts pertaining to the geographic nature of data. Also, definition mechanism are found to be extremely useful to represent aggregate concepts in geographic data processing. The general characteristics of AQL are widely discussed in (ANT78): here they will be reviewed briefly, then the geographic extension will be discussed.


Geographic Data Boundary Segment Default Option Intersection Zone Relation Industry 
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. ALD74.
    Aldred, B. K., "The case for a Locational Data Type" Technical Report, IBM UK Scientific Center, UKSC0054, April 1974Google Scholar
  2. ANT78.
    Antonacci, F., Dell' Orco, P., Spadavecchia, V. N., Turtur, A., "AQL: A Problem-solving Query Language for Relational Data Bases" IBM Journal of Research and Development, vol. 22, n. 5, Sept. 1978 pp. 541–559Google Scholar
  3. BON76.
    Bonfatti, F., Tiberio, P., "A data structure for land description and investigation", Proceedings of the fifth biennial international Codata Conference, B. Dreyfus ed., Pergamon Press, 1976Google Scholar
  4. CAR74.
    Carlson, E. D., Bennett, J. L., Giddings, G. M., Mantey, P. R. "The design and evaluation of the interactive geo-data analysis and display system", Proceedings of IFIP Congress 1974, Rosenfeld, J. L. ed., North Holland, 1974Google Scholar
  5. CAS75.
    Casazza, I., Faedo, C., Marini, G., "Una base di dati relazionali per la gestione dei dati ambientali", Atti del Convegno AICA, 1975Google Scholar
  6. CHA74.
    Chamberlin, D. D., Boyce, R. F., "SEQUEL, a Structured English Query Language", Proceedings 1974 ACM SIGFIDET Workshop, Ann Arbor, MI, April 1974, pp. 249–264Google Scholar
  7. COD70.
    Codd, E. F., "A Relational Model of Data for Large Shared Data Banks", CACM 13, 377 (1970)Google Scholar
  8. COD72.
    Codd, E. F., "Relational Completeness of Data Bases Sublanguages" Data Base Systems, Vol. 6, Courant Computer Science Symposia Series, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1972Google Scholar
  9. GOS78.
    Gosen, F., Gradenigo, G., "Proposta per un sistema informativo territoriale. Sistema di gestione di Data Bases geografici" Atti del Seminario: "Sistemi informativi per la gestione fisica ed economica dell" ambiente", Padova, March 20, 1978Google Scholar
  10. IBM1.
    "APL Language", Report No. GC26-3847, IBM Corporation, White Plains, NYGoogle Scholar
  11. IBM2.
    "APL Shared Variables (APLSV) User's Guide, Report No. SH20-1460-1, IBM Corporation, White Plains, NYGoogle Scholar
  12. IBM3.
    "APL Shared Variables (APLSV) Programming RPQ WE 1191 TSIO Program Reference Manual, Report No. SH20-1463, IBM Corporation, White Plains, NYGoogle Scholar
  13. OHK77.
    Ohkohchi, M., Udo, M., "CARPS: Computer Assisted Regional Planning System", IFAC Symposium on Environmental Systems Planning, Design and Control, M. Akashi ed., Pergamon Press, 1977Google Scholar
  14. SEM76.
    Smedley, B. S., "An Urban Management System and Geographic Data Processing in Urban Planning", IBM UK Scientific Center Report UKSC0079, April 1976Google Scholar
  15. ZLO75.
    Zloof, M. M., "Query by Example", Proceedings National Computer Conference (AFIP Press), 44, 431 (1975)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1980

Authors and Affiliations

  • F. Antonacci
    • 1
  • L. Bartolo
    • 1
  • P. Dell' Orco
    • 1
  • V. N. Spadavecchia
    • 1
  1. 1.IBM Italia, Centro Scientifico - v. del GiorgioneRomaItaly

Personalised recommendations