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The purpose of this research is to provide information about derivative bibliographic relationships in the online catalogue COBIB, to investigate size and complexity of bibliographic families and to determine whether bibliographic characteristics are associated with the extent of derivations.

A bibliographic entity consisting of a work and item is represented by bibliographic records. A random sample of records is converted into a sample of progenitor works and bibliographic families for each progenitor are constructed.

25.75 per cent of progenitor works are derivative; successive derivations with 67.02 per cent appear most frequently. The size of bibliographic families ranges from 1 to 16; older progenitors have larger families. The majority of families have one type of relationship; there is one case with four types. A large proportion, 59.06 per cent, of derivative relationships is not expressed explicitly by catalogue.

Research of bibliographic records representing more than one work is needed. It is also important to find out what catalogue users are looking for: a work or an item?

A model for COBIB is suggested; it enables an equal identification of works, items and relationships. A cataloguer must create an authority record for each work and link it with corresponding bibliographic records for items.

Information about relationships should be incorporated into the catalogue and corresponding records linked. Explicit control of derivative relationships would be of great help to catalogue users and would make information retrieval improved and more precise; it would also allow more efficient use of knowledge and library materials.

The purpose of this paper is to model and implement an extensible markup language (XML)‐based editor for library cataloguing. The editor model should support data input in the form of free text with interactive control of structure and content validity of records specified in the UNIMARC and MARC 21 formats. The editor is implemented in the Java programming language in the form of a software package.

The unified modelling language (UML 2.0) is used for the specification of both the information requirements and the model architecture. The object oriented methodology is used for design and implementation of the software packages, as well as the corresponding CASE tools.

The result is an editor for UNIMARC and MARC 21 cataloguing. The editor is based on the XML technologies by which the two basic characteristics are achieved as follows: a possibility of integrating the editor into different library software systems and, moving to another format requires only the changes of the module for bibliographic record data control.

A basic limitation of the system is related to the subsystem that controls validation of the bibliographic records and its expansion for work with other bibliographic formats. In the proposed solution, a part of the control of data input is included into the implementation itself and it is related to the UNIMARC format. That is, a part of data by which the control is done, such as repeatability of the record elements and the codebooks, is contained in the XML document of the format that is input information in the editor. However, the control that is related to validation of the format of content in record elements cannot be performed for any other format without modification in the implementation. Therefore, the research could be continued by considering the separation of data used for content control as input information for the application. In that way, this segment would also become implementation independent. One of the solutions should be extending the XML document of the format by this data. Some other solution should mean creating a totally separate system for the content validation. Moreover, the proposed editor supports processing of a bibliographic record only in the UNIMARC and MARC 21 formats. Processing of records in other formats requires considerable changes in the model.

The model of a new editor is developed on the basis of the experience and needs of electronic management in city and special libraries. Based on the given model a new editor is implemented and integrated into the BISIS software system used by the mentioned libraries. Testing and verification are performed on the bibliographic records of the public city libraries.

The contribution of this work is in the system architecture that is based on the XML documents and is independent of the bibliographic format. The XML document that contains data about the bibliographic format represents the editor input information. After a bibliographic record is created in this editor, the record is stored into an XML document that represents the editor output information. This XML document can be stored into various software systems for data storage and retrieval.

Describes a process of gradual implementation of authority control in the COBISS library information system in Slovenia (COBISS.SI). The CONOR.SI initial authority database contained, at the time of its implementation, over 24,000 authority records for personal authors, mostly Slovenian, from publishing production of the last few years. It was created automatically based on personal bibliographies of Slovenian researchers and the Slovenian national bibliography for monographs in COBISS.SI. Also describes: major conceptual issues related to the entire implementation logic of authority control; the upgrading of software for shared cataloguing required by the implementation of authority control; and the implementation process itself. Presents some experiences related to cataloguing with authority control within COBISS.SI together with plans on the subsequent implementation of authority control for other types of headings.

With the development and growth of the Washington Library Network Computer System in recent years, it has emerged as an effective and efficient automated system to support acquisitions, cataloging and other technical processing functions in libraries of all types and sizes. The online union catalog and COM catalog production has greatly expanded the effectiveness of reference and interlibrary loan services. This article covers all features of the computer system. It outlines system hardware, software, and the file structure as well as providing a description of the use of the system. Also discussed are system features such as authority and bibliographic quality control, precision database searching, and automated fund accounting for acquisitions and fiscal management. Other areas covered in this paper are: governance, administration, training, research and development, and types of users, both online and those which want to transfer software as in the recent successful installation of WLN software at the National Library of Australia.

Preparation of bibliographic data for the production of CD‐ROM public access catalogs (PACs) requires several services: merging records from various vendors or libraries, the elimination of duplicate records, the identification and decoding of holdings information, updating the database (often in an offline mode), and authority control. The nature of specific CD‐ROM catalogs affects the priorities for processing the database. For example, some systems exploit controlled vocabulary and cross references, making subject authority critical. Others provide powerful Boolean searching on key words derived from all parts of the bibliographic record; as a result, the need for quality control checks beyond those typically provided by library vendors is increased. This article identifies the services and processes offered by seven vendors that provide CD‐PACs and one vendor that processes MARC bibliographic databases.

The user interface, in broad terms, is the medium through which the user and the information come together. The types of searches a public access catalog (PAC) can perform are defined by the indexing strategy and retrieval software. The way the user's interest is communicated to the retrieval software and the way the results are communicated to the user is, by a more narrow definition, the interface software. Both the kinds of searches that can be performed by a variety of CD‐ROM PACs and how their workstations are used to accomplish the searches are considered.

Examines some of the bibliographic advantages of a union catalogue with a central database over a distributed, or “virtual” union catalogue. Discusses the nature of these bibliographic advantages in the context of interlibrary document delivery, and also the circumstances which produce them, and make them more significant. Reports on a brief study of the extent to which two major library catalogues in Singapore have diverged following the adoption of a distributed model. This indicated that the bibliographic content of a distributed union catalogue may be significantly poorer than that of a central database, and in particular in terms of more: duplication; inconsistency; errors; and omissions. There are at least four important reasons why this may be so.