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Indefinite and Maybe Information in Relational Databases.

Ken-Chih Liu, Rajshekhar Sunderraman: Indefinite and Maybe Information in Relational Databases. ACM Trans. Database Syst. 15(1): 1-39(1990)
@article{DBLP:journals/tods/LiuS90,
  author    = {Ken-Chih Liu and
               Rajshekhar Sunderraman},
  title     = {Indefinite and Maybe Information in Relational Databases},
  journal   = {ACM Trans. Database Syst.},
  volume    = {15},
  number    = {1},
  year      = {1990},
  pages     = {1-39},
  ee        = {http://doi.acm.org/10.1145/77643.77644, db/journals/tods/LiuS90.html},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX

Abstract

This paper extends the relational model to represent indefinite and maybe kinds of incomplete information. A data structure, called an I-table, which is capable of representing indefinite and maybe facts, is introduced. The information content of I-tables is precisely defined, and an operator to remove redundant facts is presented. The relational algebra is then extended in a semantically correct way to operate on I-tables. Queries are posed in the same way as in conventional relational algebra; however, the user may now expect indefinite as well as maybe answers.

Copyright © 1990 by the ACM, Inc., used by permission. Permission to make digital or hard copies is granted provided that copies are not made or distributed for profit or direct commercial advantage, and that copies show this notice on the first page or initial screen of a display along with the full citation.


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BibTeX
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Referenced by

  1. Curtis E. Dyreson, Richard T. Snodgrass: Supporting Valid-Time Indeterminacy. ACM Trans. Database Syst. 23(1): 1-57(1998)
  2. Colin Bell, Anil Nerode, Raymond T. Ng, V. S. Subrahmanian: Implementing Deductive Databases by Mixed Integer Programming. ACM Trans. Database Syst. 21(2): 238-269(1996)
  3. Clive G. Page: Astronomical Tables, 2-D Indexing, and Fuzzy-joins. SSDBM 1996: 44-52
  4. Fereidoon Sadri: Information Source Tracking Method: Efficiency Issues. IEEE Trans. Knowl. Data Eng. 7(6): 947-954(1995)
  5. Jui-Shang Chiu, Arbee L. P. Chen: An Exploration of Relationships Among Exclusive Disjunctive Data. IEEE Trans. Knowl. Data Eng. 7(6): 928-940(1995)
  6. Vangalur S. Alagar, Fereidoon Sadri, Joseph N. Said: Semantics of an Extended Relational Model for Managing Uncertain Information. CIKM 1995: 234-240
  7. Helmut Kaufmann, Moira C. Norrie: Relaxation of Correctness in Database Systems. ADBIS 1995: 90-105
  8. Marianne Winslett, Kenneth Smith, Xiaolei Qian: Formal Query Languages for Secure Relational Databases. ACM Trans. Database Syst. 19(4): 626-662(1994)
  9. Frank Shou-Cheng Tseng, Arbee L. P. Chen, Wei-Pang Yang: Searching a Minimal Semantically-Equivalent Subset of a Set of Partial Values. VLDB J. 2(4): 489-512(1993)
  10. Adegbeniga Ola, Gultekin Özsoyoglu: Incomplete Relational Database Models Based on Intervals. IEEE Trans. Knowl. Data Eng. 5(2): 293-308(1993)
  11. Curtis E. Dyreson, Richard T. Snodgrass: Valid-time Indeterminancy. ICDE 1993: 335-343
  12. Dong-Hoon Choi, Lawrence J. Henschen: On Exclusive Disjunctions in Deductive Database. DASFAA 1993: 353-359
  13. José Alberto Fernández, Jack Minker: Semantics of Disjunctive Deductive Databases. ICDT 1992: 21-50
  14. Adegbemiga Ola: Relational Databases with Exclusive Disjunctions. ICDE 1992: 328-336
  15. Ken-Chih Liu, Rajshekhar Sunderraman: A Generalized Relational Model for Indefinite and Maybe Information. IEEE Trans. Knowl. Data Eng. 3(1): 65-77(1991)
  16. Fereidoon Sadri: Modeling Uncertainty in Databases. ICDE 1991: 122-131
  17. Ken-Chih Liu, Lu Zhang: Natural Joins in Relational Databases with Indefinite and Maybe Information. ICDE 1991: 132-139
  18. Nong Zhou: Representation and Processing of Uncertain Information in Relational Databases. ER 1991: 371-388
  19. Ken-Chih Liu, Rajshekhar Sunderraman: On Representing Indefinite and Maybe Information in Relational Databases: A Generalization. ICDE 1990: 495-502
BibTeX
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