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<td class="back"><a id="top"></a><a href="sA.0.html" rel="prev">&lt;&lt;&nbsp;&sect;A.0&nbsp;Keywords</a></td>
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<div class="breadcrumb"><a class="nav" href="sA.html" rel="section">&sect;A&nbsp;OT/J Syntax</a></div>
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<h2 class="sect">&sect;A.1&nbsp;Class definitions<a class="img" href="sA.1.html"
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<p>Class definitions add two new keywords <code>team</code> and
<code>playedBy</code>. Classes which use these keywords are called
<strong>teams</strong> and <strong>bound roles</strong>, respectively.
Any class that inherits from a bound role class (either by an
<code>extends</code> clause or by implicit inheritance, cf.
<a href="s1.3.1.c.html"
title="&sect;1.3.1.(c)&nbsp;Overriding and implicit inheritance"
class="sect">&sect;1.3.1.(c)</a>) is again a bound role class.
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<table class="syntaxrule" id="sA.1.1">
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<td class="sect">&sect;&nbsp;A.1.1</td>
<td class="rule"><span class="title">ClassDeclaration</span><br /><em>[Modifiers] </em><strong class="blue"><em>[</em>team<em>]</em></strong> class <em>Identifier [</em>extends <em>Type] [</em>implements <em>TypeList]</em><br /><span class="indent5"></span><strong class="blue"><em>[</em>playedBy <em>Type] [Guard]</em></strong><em> ClassBody</em></td>
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<h5 class="constraints">Contextual constraints:</h5>
<ol class="constraints">
<li>A class which has a <code>playedBy</code> clause (a <strong>bound
role</strong> class) may not be declared static and
must be directly contained in a class that has the
<code>team</code> modifier (a <strong>team</strong> class).
</li>
<li>A class which inherits from a team class must have the
<code>team</code> modifier, too.
</li>
<li>A class which has a guard (see <a href="s5.4.html" title="&sect;5.4&nbsp;Guard predicates" class="sect">&sect;5.4</a>)
must be a team or a role.
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OT/J version 1.3 &mdash; last modified: 2010-06-08
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