Using Subject Headings for Online Retrieval is an indispensable tool for online system designers who are developing new systems or refining existing ones. The book describes subject analysis and subject searching in online catalogs, including the limitations of retrieval, and demonstrates how such limitations can be overcome through system design and programming. The book describes the Library of Congress Subject Headings system and system characteristics, shows how information is stored in machine-readable files, and offers examples of and recommendations for successful retrieval methods. Tables are included to support these recommendations, and diagrams, graphs, and bar charts are used to provide results of data analysis. Practitioners in institutions using or considering the installation of an online catalog will refer to this book often to generate specifications. Researchers in library systems, information retrieval, and user behavior will appreciate the book's detailing of the results of an extensive, empirical study of the subject terms entered into online systems by end users. Using Subject Headings for Online Retrieval also addresses the needs of advanced students in library schools and instructors in library automation, information retrieval, cataloging, indexing, and user behavior.

Can the Dewey Decimal System meet the needs of the rapidly changing information environment? Moving Beyond the Presentation Layer explores the Dewey Decimal System from a variety of perspectives, each of which peels away a bit of the presentation layerthe familiar linear notational sequence-to reveal the content and context offered by the DDS. Library professionals from around the word examine how the content and context offered by the DDS can evolve to meet the needs of the changing information environment, with a special focus on the impact of the Internet on current and future developments. Moving Beyond the Presentation Layer examines whether the Dewey Decimal System is a rigid structure best suited to a physical information environment or a polymorphic one that can be adapted to meet a variety of physical and virtual needs. This unique book reviews the 40-year history of the online use of classification systems, the development of the Relative Index over 22 editions of the DDC, recommendations to ensure the viability of the DDC in a time of mass digitization, using DDS in an environment where it hasn't been used before, teaching the DDS, special issues related to the use of the DDS in Europe, North America, and Africa, and the future of online classification. Topics examined in Moving Beyond the Presentation Layer include: using the DDC as the browsing mechanism for resource discovery classification as an online cataloging tool classification as an online end-user tool browser behavior in a DDC-based Web service the role of the DDS in the ongoing HILT (High-Level Thesaurus) project using the DDS to organize Web resources localization and interoperability in knowledge organization mapping terminologies to classification systems the DeweyBrowser and much more Moving Beyond the Presentation Layer is an essential professional resource for librarians, information scientists, computer scientists, and metadata and Web services specialists.