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