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This file is part of Logtalk <https://logtalk.org/>  
Copyright 1998-2020 Paulo Moura <pmoura@logtalk.org>

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

This example provides a simple, limited, implementation of ground linear
and intuitionistic assumptions as discussed in the following paper:

	@inproceedings{DBLP:conf/slp/TarauDF95,
	  author    = {Paul Tarau and
	               Ver{\'o}nica Dahl and
	               Andrew Fall},
	  title     = {Backtrackable State with Linear Assumptions, Continuations
	               and Hidden Accumulator Grammars},
	  booktitle = {ILPS},
	  year      = {1995},
	  pages     = {642},
	  crossref  = {DBLP:conf/slp/1995},
	  bibsource = {DBLP, http://dblp.uni-trier.de}
	}
	@proceedings{DBLP:conf/slp/1995,
	  editor    = {John W. Lloyd},
	  title     = {Logic Programming, Proceedings of the 1995 International
	               Symposium, Portland, Oregon, USA, December 4-7, 1995},
	  booktitle = {ILPS},
	  publisher = {MIT Press},
	  year      = {1995},
	  isbn      = {0-262-62099-5},
	  bibsource = {DBLP, http://dblp.uni-trier.de}
	}

A web version of this paper is also available at:

	http://www.cse.unt.edu/~tarau/research/PapersHTML/state.html
