This diploma thesis provides information about the Union Catalogue of the Czech Republic (SK ČR) and its new tasks related to Conception of development of libraries during the years 2011-2015. The aim is to show basic sets of problems, their analysis and some variants of their solutions, compared to other foreign union catalogues. The first and second part of the thesis deals with foreign union catalogues - British example of heterogeneous environment Copac: National, Academic and Specialist Catalogue, and Slovak example of homogeneous environment KIS3G, their analysis and development from the beginning to the present, current status and future plans. The third part describes SK ČR, including semi-structured interview with head of the Union Catalogues Department of the National Library, PhDr. Eva Svobodová and findings from SK ČR workgroup meeting. The final part presents the summary and comparison of the three union catalogues.

The aim of the thesis is to explore which attributes of expression and attributes of manifestation are commonly found in bibliographic records and compare them with the information needs of users. The research is focused on the Union catalog of the Czech Republic - CASLIN. In the theoretical part there are presented problems with attributes of expression and attributes of manifestation in model FRBR. In the research part there was performed content analysis of several bibliographic records owing to problems of attributes of expression and attributes of manifestation. In the research section there was made the analysis of information needs of users, too. As qualitative research methods were selected observation of participants and semi-structured interviews with respondents. The result of this thesis should be a comparison between reality in library catalogs and information needs of users.