phyllis@utcsrgv.UUCP (Phyllis Eve Bregman) (11/03/83)
UofT Department of Computer Science Seminar Schedule for the week of November 7th, 1983 Thursday, November 10th, 11:00 A.M., GB248: Professor Anders Rjornerstedt, University of Stockholm, Stockholm, Sweden: "Making type changes transparent". ABSTRACT: Systems for processing structured data are generally poor at coping with changes in the structure of data objects (type changes). This talk discusses features for managing structured types and type changes, from the perspective of form management in OIS (Office Information Systems). The focus of the paper is on the introduction and elaboration of the FORM TYPE VERSION concept. This concept is shown to be useful as a basis for making design tools and languages more capable at handling type changes. One goal is to make form type changes transparent as far as possible. The talk elaborates on principally different ways to achieve this goal. Thursday, November 10th, 3:00 P.M., GB248: Professor Art Sedgwick, Department of Computer Science, University of Toronto (Visiting): "IEEE floating-point standard". ABSTRACT: The proposed standard will be reviewed. This has now reached Draft 10.0 which may be the final version. The standard has serious implications for programming languages. For example, instead of 6 relations between numbers there will be 26 (all combinations of <, =, >, unordered and their negations). Because of possible exceptions and unordered numbers, NOT ( > ) is not exactly the same as ( <= ). These and other impacts on programming languages will be discussed. -- Phyllis Eve Bregman CSRG, Univ. of Toronto {decvax,linus,ihnp4,uw-beaver,floyd,utzoo}!utcsrgv!phyllis