IR

An introduction and some prospectives are provided for the 1971 ACM Information Storage and Retrieval Symposium held at the University of Maryland on April 1 and 2, 1971. The symposium, sponsored by the University of Maryland, the National Aeronautics ...

This paper is a survey of some of the major semantic models that have been developed for automated semantic analysis of natural language. Current approaches to semantic analysis and logical inference are based mainly on models of human cognitive ...

Ambiguity is a pervasive and important aspect of natural language. Ambiguities, which are disambiguated by context, contribute powerfully to the expressiveness of natural language as compared to formal languages. In computational systems using natural ...

This paper presents an overview of research in progress in which the principal aim is the achievement of more natural and expressive modes of on-line communication with complexly structured data bases. A natural-language compiler has been constructed ...

CUE, an input interface system which permits the computer to utilize natural but restricted English as input, is presented. In addition, an experimental model for CUE, Proto-RELADES, which can "understand" and execute English sentences about the content ...

A full text retrieval system was designed for the responsa literature, which is a large corpus of Hebrew legal cases. The unique problems of the data base --- mixture of Hebrew, Aramaic and vernaculars, lack of vowels and punctuation, extreme language ...

Questions which involve 'all', 'every', 'some', or the indefinite article, pose some peculiar problems when presented to a computerized question-answering system where ambiguities cannot be tolerated. These problems vary from the nature of the correct ...

The Relational Data File (RDF) of The Rand Corporation is among the most developed of question-answering systems. The "information language" of this system is an applied predicate calculus. The atomic units of information are binary relational ...

This paper describes the design and implementation of a general associative net structure to be used in an interactive information system, and presents a scheme designed to manage large quantities of semantic data stored in a data base on disc. The ...

One of the difficulties faced in implementing information management and retrieval systems is that each case seems to present its own special complexities. As a result information retrieval systems typically fall behind their programming schedule and ...

An approach to determining an appropriate file structure for a given application is presented, by outlining a methodology for comparing some important aspects of data management system performance. The aspect chosen for analysis is the processing time ...

Research in file organization is a problem in which the unstructured efforts of many individual researchers have not produced results commensurate with the effort expended. The paper briefly examines some of the reasons for this and suggests a structure ...

The design of a file system has never been a simple nor a straightforward task because of its complexity. Heuristics and experience still play a major role in guiding the design process. To organize the entire design process in a more systematic manner, ...

A file structure designed to provide rapid, random access with minimum storage overhead is presented. Storage and retrieval are achieved by direct attribute combination-to-address transformation thereby negating the necessity for large file dictionaries ...

A storage and retrieval scheme which places items to be stored at the nodes of a binary tree is discussed. The tree is always balanced in a certain sense thus insuring that no excessively long search paths can exist. In addition to presenting the ...

The public storage in any time sharing system tends to continually grow. This necessitates the implementation of certain measures to maintain public storage. One of these possibilities is creation of an archival level of storage called "migrated" ...

The application of compact coding, differencing and other techniques to indexed sequential files is discussed. The effects on system performance are discussed and reductions of almost 80% in mass storage requirements for a particular file are reported.

A particular classification and retrieval model are considered. A notion is introduced which indicates the extent to which retrieval performance may be improved by a suitable choice of classification within the model. A method for determining the ...