Information storage and retrieval systems on mainframes and minicomputers: a comparison of text retrieval packages available in the UK

1984 ◽  
Vol 18 (2) ◽  
pp. 124-146 ◽  
Author(s):  
John Ashford
Keyword(s):  
Information Storage And Retrieval ◽  
Text Retrieval ◽  
Information Storage ◽  
Storage And Retrieval ◽  
Retrieval Systems ◽  
The Uk

Information storage and retrieval systems with incomplete information I

1979 ◽  
Vol 2 (1) ◽  
pp. 17-41
Author(s):  
Michał Jaegermann
Keyword(s):  
Incomplete Information ◽  
Information Storage And Retrieval ◽  
Boolean Algebras ◽  
Information Storage ◽  
Storage And Retrieval ◽  
Retrieval Systems ◽  
Theory Of Information

In the paper is developed a theory of information storage and retrieval systems which arise in situations when a whole possessed information amounts to a fact that a given document has some feature from properly chosen set. Such systems are described as suitable maps from descriptor algebras into sets of subsets of sets of documents. Since descriptor algebras turn out to be pseudo-Boolean algebras, hence an “inner logic” of our systems is intuitionistic. In the paper is given a construction of systems and are considered theirs properties. We will show also (in Part II) a formalized theory of such systems.

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