In order to achieve a good quality/price ratio the online searcher must concentrate on both the strategic approach--database selection, understanding of search software, and efficient search strategy--and the conceptual approach--analyzing semantic content. The online search expert becomes more skilled (the "Matthew" effect) while the…

Discusses the need for computer assisted strategies to search multiple databases. A method is presented in which a pool of predefined searches is set up and a strategy is developed to identify an optimal search path. The application of this method is illustrated using a search carried out in seven databases. (11 references) (CLB)

Defines corporate family searching as the act of using computerized databases to identify a parent company and all of its related companies. Business databases available on Dialog that can be searched to trace a corporate family are identified and appropriate search strategies are described. (CLB)

Discusses the rationale, principles, required tools, advantages, and disadvantages of the Multifile Multidisciplinary (Horizontal) Search approach to searching online databases. It is noted that this approach is characterized by the use of a large number of files spanning a wide variety of disciplines. (12 references) (MES)

Reviews three database systems available for searching generic chemical structure representations: (1) Derwent's Chemical Code System; (2) IDC's Gremas System; and (3) Derwent's Markush DARC System. Various types of searches are described, features desirable to users are discussed, and comparison searches are described that measured recall and…

Suggests ways to increase precision when searching full text files on BRS, Mead Data Central and DIALOG. All of the techniques are based on achieving repetition of central concepts as expressed in natural language. Schematic representations of strategies and sample searches on each of the three systems are provided. (10 references) (CLB)

Describes study that compared the costs of online searching on six databases in four systems. Costs of the search phase and the output phase are analyzed separately; transmission rate and telecommunication costs are examined; and the effects of pricing structures on online searches are discussed. (five references) (LRW)

Presents the advantages and disadvantages of free text and controlled vocabulary retrieval techniques and a methodology to assist in deciding on the optimal technique for a particular purpose. The relevance of the techniques for expert systems and full text contexts is also discussed and recommendations for further research are made. (Author/EM)

Compares features of online public access catalogs (OPACs) at six British universities: (1) Cambridge; (2) Hull; (3) Newcastle; (4) Surrey; (5) Sussex; and (6) York. Results of keyword subject searches on two topics performed on each of the OPACs are reported and compared. Six references are listed. (MES)

Intended to assist library educators, vendor representatives, end-user trainers, and experienced searchers, this article examines typical problems encountered by students in learning online searching. Problems with database selection, search tactics, and using the search system are highlighted, and a sample online exercise and search request form…

This study compares results of searching full text of journal articles available on standard inverted file systems with searching of various parts of a document's surrogate. Relative recall and precision ratios for four search methods (full text, abstract, controlled vocabulary, bibliographic union) are reported. Search topics are appended. (14…

Provides a checklist of functions and capabilities of online searching systems that attempts to cover all system features, not just searching functions. The checklist is suggested as a tool for checking features of new systems, as a framework for comparing systems, and as a source of suggestions for developing new online systems. (10 references)…

Evaluates the Library and Information Science Abstracts on optical data disk available through SilverPlatter Information Inc. The criteria discussed include installation instructions; ease of use; retrieval facilities; the results of a test search; the screen display; documentation; characteristics of the database; and cost and updating. (CLB)

Discussion of online searching in the humanities focuses on a comparison of the retrieval from two databases which cover philosophical materials, Philosopher's Index and FRANCIS. Retrieval performance measures are described, including precision and number of relevant records, and the results are discussed. The article concludes with a…

Assesses the promotion and development of online information retrieval in China. Highlights include opening of the first online retrieval center at China Overseas Building Development Company Limited; establishment and activities of a cooperative network; online retrieval seminars; telecommunication lines and terminal installations; and problems…