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	<title>Logtalk built-in predicate: create_protocol/3</title>
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<div class="top-left">Logtalk reference manual</div> 
<div class="top-right">Built-in predicate: create_protocol/3</div>
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<h2 class="code">create_protocol/3</h2>


<h4>Description</h4>

<pre>create_protocol(Identifier, Relations, Directives)</pre>
<p>
Creates a new, dynamic, protocol.
</p>

<h4>Template and modes</h4>

<pre>create_protocol(+protocol_identifier, +list, +list)</pre>

<h4>Errors</h4>

<dl class="errors">
	<dt>One of the predicate arguments is a variable:</dt>
		<dd><code>instantiation_error</code></dd>
	<dt>Identifier is not a valid protocol identifier:</dt>
		<dd><code>type_error(protocol_identifier, Identifier)</code></dd>
	<dt>Identifier is already in use:</dt>
		<dd><code>permission_error(replace, category, Identifier)</code></dd>
		<dd><code>permission_error(replace, object, Identifier)</code></dd>
		<dd><code>permission_error(replace, protocol, Identifier)</code></dd>
	<dt>Relations is neither a variable nor a proper list:</dt>
		<dd><code>type_error(list, Relations)</code></dd>
	<dt>Directives is neither a variable nor a proper list:</dt>
		<dd><code>type_error(list, Directives)</code></dd>
</dl>

<h4>Examples</h4>

<pre>| ?- create_protocol(foo, [extends(bar)], [public(foo/1)]).</pre>

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