Abstract
In the paper properties of en extension of a query language for incomplete information systems by a new descriptor “known(i)” are examined. Introducing a new descriptor “known(i)” allows to distinguish the objects about which our knowledge is complete, and increases the descriptive power of the language. It is shown that every query (term) is equivalent to a term in a simpler canonical form. Completeness results are presented.
Get full access to this article
View all access options for this article.