Describes the theoretical framework of a retrieval system that uses data structures called bitmaps to improve search algorithms for medium-sized systems. Information retrieval systems that contain the full text of the documents are discussed, and the use of inverted files such as concordances for small texts is explained. (24 references) (LRW)

Discusses the problems of compressing a large textual database for storage on CD-ROM. A text-compression algorithm is presented, new algorithms for compression of indices are described, and the ARTFL (American and French Research on the Treasury of the French Language) database is used as an example. (14 references) (LRW)

Describes compression methods for components of full-text systems such as text databases on CD-ROM. Topics discussed include storage media; structures for full-text retrieval, including indexes, inverted files, and bitmaps; compression tools; memory requirements during retrieval; and ranking and information retrieval. (Contains 53 references.)…

Discusses indexes for text databases and presents an efficient implementation of an index for text searching called PAT array, or suffix array, where the database is stored on secondary storage devices such as magnetic or optical disks. Additional hierarchical index structures and searching algorithms are proposed that improve searching time, and…

Introduces the multicharacter trie as an index structure that can improve the time needed for retrieving full-text materials stored on CD-ROMs. The advantages of this structure compared to other structures are described, and experimental results comparing it to the widely used B+ tree and other structures used for full-text retrieval are…

Based on evaluations of 1,025 CD-ROM products, this article summarizes trends in (1) growth of commercially available CD-ROM titles; (2) types and subjects of products produced; (3) update options; (4) hardware systems CD-ROMs are designed to run on; (5) prices; and (6) multimedia products. Possible future developments that could revolutionize…

To compete effectively in the world of electronic reference, libraries must offer remote patrons a variety of index, abstract, and full text services, which are easy to access and which answer questions. A marketing alliance between electronic reference vendors and public libraries would ensure access, fair compensation for publishers and authors,…

Presents guidelines developed by the International Coalition of Library Consortia (ICOLC) for statistical measures of the use of Web-based indexed, abstracted, and full-text resources. Privacy, user confidentiality, comparative statistics, and access and delivery mechanisms are discussed. (LRW)

Discusses students' use of multiple sources for research and describes an automated system, "Super TOM Jr.," designed for middle and junior high school students, that includes citations, indexes, and full text of magazine and newspaper articles and selected reference sources. Research activities relating to Memorial Day and World War II…

This paper discusses the indexing, collection, and maintenance processes, as well as the retrieval interface, to public digital libraries. The paper begins by briefly surveying both Internet technical report collections and World Wide Web search engines. It goes on to describe a prototype digital library, the New Zealand Digital Library for…

This study used focus groups, semi-structured interviews, and questionnaires to collect input for developing the Mann Library Gateway at Cornell University. This Web-based information system provides access to catalogs, indexes, directories, numeric datasets, full-text documents, and spatial files. Concluded that scholars would benefit from…

Describes GALILEO (Georgia Library Learning Online), a statewide information system started by the state university library system and being expanded to include private colleges, public libraries, and school libraries. Electronic information resources range from full text or bibliographic data of academic journals to census data and state…