Borko and Bernier (1975), for example, regard abstracting
as a form of writing that has a unique style (it is not a "natural" form); abstracts must be brief, accurate, and clearly written.
They are independent of diagnosis; indeed, the abstracting
can be done without any knowledge kf the patient's ultimate diagnosis.
and indexing (A&I) databases are now well established resources for library patrons that exist alongside the various types of catalogs; increasingly, the extended functionality of local integrated library systems and the availability of Z39.50 is making it possible to offer access to catalogs and abstracting
and indexing databases through common user interfaces.
It provides cover-to-cover abstracting
and indexing of more than 415 key English-language periodicals.
The new database is also distinguished by a cover-to-cover approach to indexing and abstracting
of publications; full 50-to-150-word abstracts, convenient as references sources in themselves and designed to provide enough information to easily determine whether articles meet research needs; time-saving search options, including keyword, controlled vocabulary, and abstract word searches; monthly updates on disc and tape, supplemented by twice-weekly updates available online; citations included for education-related legal cases; online updates available to CD-ROM and magnetic tape subscribers; and full bibliographic data for each entry.