Analyzes a study of the effect of controlled variations in indexing vocabulary size on retrieval performance, using the Cranfield 200 and 1400 test collections. Sets of variable-length character strings were tested, in an application of the Cluster Hypothesis and in a series of linear associative retrieval experiments. (Author/SW)

A discussion of the theory and process of indexing--taxonomy, word frequency, and interrelationships of terms. (LS)

Reviews the state of the art in automatic indexing, concentrating on the literature from 1968 to 1973. (Author/PF)

This investigation shows why and how an artificially created scientific language finds it impossible to keep pace with current developments and thus points to the source of strength of natural language. (Author)

Discusses theoretical considerations of indexing as a part of information retrieval theory. Topics discussed include mentalist proposals; text representation and knowledge representation; rules of grammar and syntax; linguistic theory; philosophical theories of Wittgenstein regarding rules; retrieval practices; and the formation of rules in…

Presents criteria for an effective syntagmatic relator system and describes how conceptual syntagmatic relationships are expressed in natural language, commenting on the adequacy of such expressions for document retrieval systems. Only one type of expression, a gestalt structure, represented as a frame, conforms to the criteria. (Author/JKP)

Introduces a novel order statistic, the "adapted Gini index," and relates it to the conventional form of Bradford's law. An alternative index of dispersion is suggested based on the relative entropy of the frequency distribution. A variety of experimental data is reported. (VT)

Farradane's relational indexing appeared applicable to the scientific area of the properties of metals and gave good results with a greater depth of indexing. (Author/PF)

Some problems arising in the combination of discipline-oriented retrieval systems for the purpose of constructing a specialized retrieval system for a multidisciplinary topic are considered. A compromise solution involving an augmented combined index is suggested. (4 references) (Author/NH)

Proposes a new rule system and notation that supports the characterization of a document based on its structure or architecture (primarily linear, paper-copy media). Examples of the application of the notation are provided. (Author/JKP)

The indexing depth in several documentation systems is shown to have a mixed Poisson distribution. (PF)

Discusses Web impact factors (WIFs), Web versions of the impact factors for journals, and how they can be calculated by using search engines. Highlights include HTML and document indexing; Web page links; a Web crawler designed for calculating WIFs; and WIFs for United Kingdom universities that measured research profiles or capability. (Author/LRW)

The development of the INSPEC vocabulary system which comprises a unified indexing and classification scheme is described together with the reasons for its adoption. (Author)