Describes a hierarchical text database model and defines an algebra based on concordance lists. The algebra is presented as a theoretical model to define both a conceptual schema for the database and search protocols for database implementation. Several retrieval examples are included. (19 references) (MES)

Describes the training and support offered to users upon the implementation of a corporate online text retrieval system, and offers insights from the experience. Areas discussed include training programs and objectives, user support services and support personnel, user documentation, database building, and performance evaluation and measurement.…

Introduces a hypertext data model for textual databases in which the text is divided into a syntactic structure, which describes the relationships of the text parts, and an access structure, which is generated from the syntactic structure by users' queries. Implementation considerations for the structuring component, retrieval component, and…

Describes the method used by the American Chemical Society to keyboard its primary journals directly into a publishing database, which is then used to produce printed journals and create an online full text file. The use of a generalized mark-up format to convert journals not keyboarded in such a manner is suggested. (four references) (CLB)

Describes an approximate document ranking process that uses a compact array of in-memory, low-precision approximations for document length. Combined with another rule for reducing the memory required by partial similarity accumulators, the approximation heuristic allows the ranking of large document collections using less than one byte of memory…

The Institute of Physics Publishing (IPP), a subsidiary body of the Institute of Physics (IOP), has used electronic publishing on the Internet as a major means of improving the speed of dissemination of physics information. The development of the Comprehensive Electronic Journals service is described along with recent enhancements and other…

Presents two groups of text encoding problems encountered by the Brown University Women Writers Project while using Standard Generalized Markup Language (SGML) to create a database of book transcriptions: dual emendation and correction, and multiple hierarchies. Offers several possible approaches to these encoding problems and analyzes the issues…

Examines the consequences of and implications resulting from the conversion of the Human Relations Area Files (HRAF) Microfiche Archive to optical data disk storage. The discussion focuses on changes made in data content, structure, and display, and the effect on user access and utility. (six references) (CLB)

Describes the changes scientific abstracting and indexing services are making to develop new production systems for a marketplace which is influenced by the information superhighway and the demand for information in an electronic format. Descriptions are included of computer system and data input changes implemented by several database producers…