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This file is part of Logtalk https://logtalk.org/ SPDX-FileCopyrightText: 1998-2023 Paulo Moura <pmoura@logtalk.org> SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ________________________________________________________________________

To load this example and for sample queries, please see the SCRIPT.txt file.

This example creates a chain of engines passing a term. The original example was written by Jan Wielemaker. Currently it runs on ECLiPSe and SWI-Prolog. It should run also on XSB and YAP if and when these systems bugs with coroutining and/or threads get fixed.