25 lines
997 B
Plaintext
25 lines
997 B
Plaintext
YAP Core Built-ins {#core}
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=================
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This chapter describes the core predicates that control the execution of
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Prolog programs, provide fundamental functionality such as termm manipulation or arithmetic, and support interaction with external
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resources, Many of the predicates described here have been standardised by the ISO. The standartised subset of Prolog also known as ISO-Prolog.
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In the description of the arguments of predicates the following
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notation will be used:
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+ a preceding plus sign will denote an argument as an "input
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argument" - it cannot be a free variable at the time of the call;
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+ a preceding minus sign will denote an "output argument";
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+ an argument with no preceding symbol can be used in both ways.
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@copydoc builtins
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@{
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@defgroup builtins YAP Core Builtins:
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@}
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