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The {log} (read setlog) project aims at the design and
development of a Constraint Logic Programming language that embodies the
fundamental forms of set designation and a number of primitive operations
for set management. At this stage the design and implementation of the
core part of the language is almost finished. The {log} language can be
used either as a stand-alone CLP language or as an addition to Prolog that
allows to extend Prolog with set constraint management facilities.
Various extensions to the core part of the language (e.g., other kinds
of set constraints, other forms of data aggragates, more powerful intensional
set designations, etc.) are under development at present and will be integrated
into {log}.
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using {log}
current
release
programming
examples
previous releases
related information
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Download the {log} interpreter (file setlog.pl) along
with its related libraries (files setloglib.slog, setloglibpf.slog,
setlog_rules.slog), and save them into the same directory.
To start working with the interpreter, invoke
Prolog and then load the {log} interpreter, e.g., by giving the
directive ?-consult(setlog).
{log} can be used either (a) in an interactive way, or (b) as a Prolog library within any Prolog program. (a) To start using {log} in an interactive way give the goal ?-setlog. {log} will notify you that it is ready to accept {log} goals by showing its prompt ({log}=>) on the standard output. To exit from the {log} interactive environment give the goal {log}=>halt. To re-enter the {log} interactive environment give the goal ?-setlog. (b) To use {log} within a Prolog program (i.e.,without leaving the Prolog execution environment), call the predicate setlog(+Goal,-Constr_ext), where Goal is any {log} goal and Constr_ext is the (possibly empty) list of computed {log} set constraints (see the help information for other predicates to call {log} within a Prolog program). Use the Prolog goal setlog_help or the {log} goal help to get general help information. |
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