ISO/IEC JTC1 SC22 WG17 Minutes via Zoom
Date of meeting: 2024-06-03
Time of meeting: 16:00 - 18:20 UTC

Ad 1. Greeting and introduction of participants, administrativa

WG17 members:
Bill Ash (SC22 commitee manager)
Klaus Däßler (Germany)
Manuel Hermenegildo (Spain)
Mark Thom (Canada)
Markus Triska (Austria)
Ulrich Neumerkel (convener)

Invited non-member experts:
Adrian Arroyo Calle (Spain)
Jose Morales (Spain)

Ad 1.1, minutes of 2023 meeting N298 were approved.

Ad 1.2, recent progress in Prolog systems.

On reviewing new conformity tests #311-#326 of
https://www.complang.tuwien.ac.at/ulrich/iso-prolog/conformity_testing
no issues requiring an reaction were identified.

New system X-Prolog
https://play.google.com/store/apps/details?id=org.xprolog.xp

Ad 2 Further corrigenda.

#53 up to #59 were reviewed. #56 was discussed leading to:

Resolution A1: (:-)/1 and (:-)/2 should not be definable
although they are neither control constructs nor built-in predicates.

Unanimous.


Action item for producing a comparison table for the related errors.

Ad 3 Prolog prologue.

Review of p.p.10 foldl/4..6.
Discussion about further foldl/7, foldl/8 not conclusive.

Ad 3.2.1 countall/2

Resolution A2: Include countall/2 as p.p.11 into the Prolog prologue.

Unanimous.

Ad 3.2.2 crypto_data_hash/3

Resolution A3: Include crypto_data_hash/3 as p.c.x into a separate
subclause of the Prolog prologue.

Unanimous.

Ad 4 DCG, ballot preparation for DTS underway.
Tests in https://www.complang.tuwien.ac.at/ulrich/iso-prolog/phrase.

Ad 5 dif/2, currently no further action.

Ad 6 continued interest into attributed variables.

Forthcoming Prolog events of interest to WG17 members:

ICLP Dallas October 11-17th 2024 will include a Prolog workshop.
https://www.iclp24.utdallas.edu/

Scryer Prolog meetup in Vienna, November 7-8th 2024.
https://www.digitalaustria.gv.at/eng/insights/Digital-Austria-Events-EN/Scryer-Prolog-Meetup-2024

Meeting adjourned at 18:20 UTC.