As one of the segments of data quality analysis, theoretical and methodological approaches towards measuring the quality of data in bibliographic and authority records are presented. On the basis of professional literature review, the paper focuses on metrics, methods of measurement and results analysis.
A set of dimensions was developed for the purposes of quality analysis of data of bibliographic and authority records. The dimensions are qualitative descriptions of the types of data required in records. The set was developed by literature review and typology of errors, prepared by analyzing the recommendations given to librarians within quality control of daily bibliographic records production in COBIB.SI in 2017. The final set consists of 11 dimensions; it includes different data requirements within the following two basic categories of dimensions: quality of data value and quality of data representation.
In November 2018, with the entry of authority records for personal names into the VIAF (Virtual International Authority File) system, Slovenia joined national libraries and other institutions that form authority data. Thus, Slovenian authority data is published at a global level. The article presents the VIAF system, the combining of records into clusters and their appearance in the web.
The article presents the analysis of the annual increment of bibliographic records in COBIB.SI in 2017. According to the data as of 31 December 2017, 174,995 new bibliographic records were created in COBIB.SI in 2017; the data collected during 2017 (n = 171,273) is analysed. The data on bibliographic and authority records downloaded from other databases is included, e.g. from WorldCat (OCLC), ISSN Register (International Standard Serial Number), Online Catalogue of the Library of Congress and Library of Congress Name Authority File (LCNAF).
The article shows the analysis of the annual increment of bibliographic records in COBIB.SI in 2016 by month and by day; records were contributed by cataloguers from 252 libraries. According to the data as of 31 December 2016, 181,535 new bibliographic records were created in COBIB.SI in 2016; the data for 177,486 bibliographic records is analysed and presented. At the end of the year, the monthly increment of bibliographic records increased, which can be contributed to the records for theses and dissertations.
The article shows the annual increment of bibliographic records in COBIB.SI in 2015. The data on the increment by months and by days was analysed. With a total increment of 27.88%, November, October and January were the leading months, the increment was a little over 9% in each of these months. In 2015 the largest number of bibliographic records was created on Tuesdays and Wednesdays.
The fund of serials with three levels of numbering is not displayed in the COBIB.SR online bibliographic catalogue/database uniformly for all libraries. This diminishes the principle of shared cataloguing as a uniformed display of library funds is definitely required to obtain precise information about where a certain publication can be found.
For more than twenty years, the Permanent UNIMARC Committee (PUC) has been directing the development of four UNIMARC formats; two of them enable international exchange of bibliographic and authority data, whereas the other two formats support high quality standardised operation of library and bibliographic systems. In the last decade, the most important tasks performed by PUC have included UNIMARC data transfer to the web, FRBR model implementation and independent development of formats to ensure their compatibility with various cataloguing rules.
The article shows the annual increment of material in COBIB.SI. The data on the increment of bibliographic records by months for 2014 was analysed. With an increment of 10.65%, January 2014 was the leading month, followed by October with 9.41%. On an annual level, the largest number of bibliographic records is created on Mondays and Tuesdays.
The article is a short overview of the development and changes in cataloguing practice in Slovenian libraries from World War II to the present day, with special attention paid to the role and duties of the principal catalogue editor and the National Cataloguing Committee, revealing future actions and trends in the development of the national cataloguing codes.
