Abstracts

LRTS v 37, no. 1, January 1993

School Library Media Centers and Networks

Phyllis J. Van Orden and Adeline W. Wilkes

This descriptive, exploratory study of building-level school library media centers belonging to at least one multistate, multitype library network was designed to investigate the impact of networks on collections and technical services. A questionaire was used to survey school library media specialists' insights into the benefits and harriers of networks; the implications of networking on cataloging, classification, and processing practices; inter-library loan patterns; resource sharing; and responsiveness of teachers and students to networking.

Indexing Overlap and Consistency between the Avery Index to Architectural Periodicals and the Architectural Periodicals Index

Angela Giral and Arlene G. Taylor

The rapid development of access to information via such avenues as the Internet requires that librarians learn more about secondary sources that serve as tools for organizing vast amounts of information into manageable pieces. Two such secondary sources are the Avery Index to Architectural Periodicals and the Architectural Periodicals Index. The overlap of article coverage and the consistency of indexing between the two indexes, which include articles from many of the same journals, were examined. Approximately 71% of the sample articles were from the journals indexed in common. However, indexing is selective, and it was found that about 45% of the sample articles were not selected for indexing by the other index. The articles that were indexed by both had considerable indexing differences. The title was recorded significantly differently about 16% of the time. There were also numerous differences in number of access points assigned and in the form of access points used by both indexes. In order to collaborate, the two agencies involved would have to agree on such things as selection criteria, treatment of special issues, guidelines for description, sources of authority control, and terminology for descriptors. Dividing up the common journals would not necessarily reduce the current work load for each index. Users of online indexes and librarians who must choose indexes to be mounted locally need to be aware of differences in comprehensiveness, terminology, recording of titles, and recording of names.

Characteristics of Subject Headings in the Library of Congress BOOKSM Database

Martha O'Hara Conway

A thorough understanding of current subject cataloging practice, especially Library of Congress practice, will assist librarians in making the best use of new and emerging technology to ease the task of constructing subject headings. To gain insight into the most current subject cataloging practices at the Library of Congress, a random sample of one thousand bibliographic records with one or more 6XX fields and Library of Congress card numbers assigned from 1988 to the present was drawn from the BOOKSM database. Library of Congress catalogers rely heavily on the system of free floating subdivisions in the process of constructing subject headings. Attempts to improve the subject cataloging process must take into account this fundamental characteristic of the Library of Congress subject headings system.

Characteristics of Duplicate Records in OCLC's Online Union Catalog

Edward T. O'Neill, Sally A. Rogers, and W. Michael Oskins

Duplicate records in the Online Union Catalog of the OCLC Online Computer Library Center, Inc., were analyzed. Bibliographic elements comprise information found in one or more fields of a bibliographic record; e.g.. the author element comprises the main and added author entry fields. Bibliographic element mismatches in duplicate record pairs were considered relative to the number of records in which each element was present. When a single element differed in a duplicate recordpair, that element was most often publication date. This finding shows that a difference in the date of publication is not a reliable indicator of bibliographic uniqueness. General cataloging and data entry patterns such as variations in title transcription and form of name, typographical errors, mistagged fields, misplaced subfield codes, omissions, and inconsistencies between fixed and variable fields often caused records that were duplicates to appear different. These factors can make it extremely difficult for catalogers to retrieve existing bibliographic records and thus avoid creating duplicate records. They also prevent duplicate detection algorithms used for tape-loading records from achieving desired results. An awareness of particularly problematic bibliographic elements and general factors contributing to the creation of duplicate records should help catalogers identify and accept existing records more often. This awareness should also help to direct system designers in their development of more sensitive algorithms to be used for tape loading. The resulting general reduction in the number of duplicate records in union catalogs will be a major step toward increased cataloger productivity, user satisfaction, and overall online database quality.

Preservation Needs of Oversized Illustrations in Geology Master's Theses

Sally J. Scott

Preservation of deteriorating materials in library collections is a serious concern for many libraries. Determination of the extent of preservation need is critical to eliciting support for solutions to the problem. A study to evaluate the need for preservation of the oversized pocket illustrations in geology master's theses was conducted at the University of California, Los Angeles (UCLA). Forty-five percent of the illustrations were found to be in need of preservation. Factors contributing to their deterioration are described, and suggestions are made for preventing future problems.