An algebra for structured text

The Standard Generalized Markup Language (SGML) is generally used to mark the logical structure of a document. In general, the structure information obtained from SGML documents can be used by an IR system to perform structure-level retrieval. In this thesis, we present a formal model and a modified version of Abiteboul and Beeri\u27s complex object algebra to manipulate the content and structure of SGML documents. Furthermore, we provide an extensive list of queries and their formulations to show the algebra\u27s expressive power for manipulation of textual objects

NASA RECON: Course Development, Administration, and Evaluation

The R and D activities addressing the development, administration, and evaluation of a set of transportable, college-level courses to educate science and engineering students in the effective use of automated scientific and technical information storage and retrieval systems, and, in particular, in the use of the NASA RECON system, are discussed. The long-range scope and objectives of these contracted activities are overviewed and the progress which has been made toward these objectives during FY 1983-1984 is highlighted. In addition, the results of a survey of 237 colleges and universities addressing course needs are presented