Citation analysis is a well$-$established library and information science research methodology that is frequently used to analyse scholarly communications patterns as well as for numerous evaluative purposes. Citations selected from journals, textbooks, dissertations and theses, faculty publications, and other sources have frequently been used as collection evaluation checklists.

The advantages and disadvantages of using citations for checklists have been reviewed by this author. The technique is based on the assumption that the cited sources were used by researchers, and thus should be contained in a library collection supporting research. Relevant interdisciplinary or multidisciplinary citations might be included that would not appear on other lists specific to a particular subject. Among the disadvantages, some citations may be peripheral to the topic, the technique focuses on library patrons who publish, and an item might be cited simply because it is available rather than because it is the best resource.

Ever since so$-$called full$-$text databases emerged during the $1980$s$,$ the completeness of their coverage has been debated and, to some extent, researched. One of the earlier investigations of full$-$text database content, published by Pagell in $1987,$ bore the provocative and catchysounding subtitle, "How Full Is Full?" A variety of methods have been used or proposed to assess full$-$text database content coverage and quality, including Pagell's comparison of print issues with database coverage.

The checklist method also has been used to evaluate indexing and abstracting coverage, fulltext content of databases, or both. In this modification of the traditional checklist approach. Typically, a list of journal titles is checked against the vendor's list of titles theoretically contained in the database.

A citation$-$based checklist addresses the extent to which a collection or database would meet the needs of researchers. Thus, the answer to that catchy$-$sounding question, "How full is full?" is$,$ in this instance, "not very full." However, one should acknowledge that neither database provider claims complete full$-$text coverage.

Generally, full text and indexing and abstracting coverage is stronger for more current citations and declines with citation age.

The full$-$text coverage of both databases is highly skewed toward United States publications, as measured by the percentage of United States versus non$-$United States citations held and the origin of those citations actually held in full text. Such a licensing decision would incorporate a variety of additional factors, such as budgetary considerations, collecting

priorities, curricular and teaching needs, researcher interests, and other databases already licensed, that would vary from library to library.

This research is significant because it serves as further evidence that the citation$-$based checklist technique can be adapted to database content evaluation. A detailed analysis of coverage by such critical parameters as publication date, county of origin, and subject is offered. Moreover, the study represents the first known application of the technique to database evaluation for the field of library and information science.

$1\mathrm{.}1$ With regards to the above case study, analyse the checklist approach as a project risk management tool with examples