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README
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This directory contains the language specification for a temporal
extension to the SQL-92 language standard. This new language is
designated TSQL2.
The language specification present here is the final version of the
language.
Correspondence may be directed to the chair of the TSQL2 Language
Design Committee, Richard T.Snodgrass, Department of Computer
Science, University of Arizona, Tucson, AZ 85721,
<rts@cs.arizona.edu>. The affiliations and e-mail addresses of the
TSQL2 Language Design Committee members may be found in a separate
section at the end of the language specification.
The contents of this directory are as follows.
spec.dvi,.ps TSQL2 Language Specification, published in September, 1994
bookspec.ps TSQL2 Language Specification, as it appears in the TSQL2
book, published in September, 1995 (see below).
sql3 change proposals submitted to the ANSI and ISO SQL3
committees.
Associated with the language specification is a collection of commentaries
which discuss design decisions, provide examples, and consider how the
language may be implemented. These commentaries were originally proposals to
the TSQL2 Language Design Committee. They now serve a different purpose: to
provide examples of the constructs, motivate the many decisions made during
the language design, and compare TSQL2 with the many other language
proposals that have been made over the last fifteen years. It should be
emphasized that these commentaries are not part of the TSQL2 language
specification per se, but rather supplement and elaborate upon it. The
language specification proper is the final word on TSQL2.
The commentaries, along with the language specification, several
indexes, and other supporting material, has been published as a book:
Snodgrass, R.T., editor, The TSQL2 Temporal Query Language, Kluwer
Academic Publishers, 1995, 674+xxiv pages.
The evaluation commentary appears in the book in an abbreviated form; the
full commentary is provided in this directory as file eval.ps
The file tl2tsql2.pl is a prolog program that tranlates allowed temporal
logic to TSQL2. This program was written by Michael Boehlen
<boehlen@iesd.auc.dk> He may be contacted for a paper that describes this
translation. This is a rather dated version of that program. Newer versions
are available at http://www.cs.auc.dk/general/DBS/tdb/TimeCenter/Software
(the TimeDB and Tiger systems).