Results obtained by processing a corpus of 2675 medical titles indicate that several properties definable in terms of inclusion relationships among terms have significance for vocabulary control. (Author)

Presents a computer-based system for generating thesauri from modulated subject-propositions (subject headings), which are structured according to facet analysis and augmented with appropriate codes for relating terms. Input to and operation of the system are described, as well as the programs developed. Fifteen references are listed. (Author/BK)

Following a discussion of derivative versus assignment indexing, use of roles, and concept behind Preserved Concept Indexing System, features of PERMDEX (microcomputer program to assist in creation of permuted printed index) are described including indexer input and prompts, the shunting algorithm, and sorting and printing routines. Fourteen…

Describes an indexing technique based on overlapping word fragments as reference strings that are linked in a directed graph structure which makes possible exact match-, partial match-, and masked-partial match-retrieval and indicates search strategies for each case. Eight figures, two tables, and nine references are provided. (RBF)

Describes technique for automatic book indexing requiring dictionary of terms with text strings that count as instances of term and text in form suitable for processing by text formatter. Results of experimental application to portion of book text are presented, including measures of precision and recall. Ten references are noted. (EJS)