There is relatively new discipline named Knowledge Discovery
from Databases, which is able to get useful information from
a huge number of data. And there is no reason why don't use
this method in libraries. On the contrary librarianship as a
branch, which has a mission to order information should
actively participate in the development of this method. 
The main goal of this thesis is to process the data from Union
Catalogue of Masaryk University in Brno. Following that
analyssis I have made out the suitable method for gaining the
knowledge from data file, I have evaluated the results and
established the conclusion from them, suggested the suitable
solution.