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:- protocol(termp).
:- info([
version is 1.0,
author is 'Paulo Moura',
date is 2000/7/24,
comment is 'Prolog terms protocol.']).
:- public(ground/1).
:- mode(ground(@term), zero_or_one).
:- info(ground/1, [
comment is 'True if the argument is ground.',
argnames is ['Term']]).
:- public(new/1).
:- mode(new(-nonvar), zero_or_one).
:- info(new/1, [
comment is 'Creates a new term instance (if meaningful).',
argnames is ['Term']]).
:- public(occurs/2).
:- mode(occurs(@var, @term), zero_or_one).
:- info(occurs/2, [
comment is 'True if the variable occurs in the term.',
argnames is ['Variable', 'Term']]).
:- public(subsumes/2).
:- mode(subsumes(@term, @term), zero_or_one).
:- info(subsumes/2, [
comment is 'The first term subsumes the second term.',
argnames is ['General', 'Specific']]).
:- public(subterm/2).
:- mode(subterm(?term, +term), zero_or_more).
:- info(subterm/2, [
comment is 'The first term is a subterm of the second term.',
argnames is ['Subterm', 'Term']]).
:- public(valid/1).
:- mode(valid(@nonvar), zero_or_one).
:- info(valid/1, [
comment is 'Term is valid.',
argnames is ['Term']]).
:- public(vars/2).
:- mode(vars(@term, -list), one).
:- info(vars/2, [
comment is 'Returns a list of all term variables.',
argnames is ['Term', 'List']]).
:- end_protocol.
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