ty Functions in Sampling Statements</h3>
<p>Functions whose name ends in <code>_lpdf</code> or <code>_lpmf</code> (density
and mass functions) may be used as probability functions and may be
used in place of parameterized distributions on the right-hand-side of
sampling statements. There is no restriction on where such functions
may be used.</p>
</div>
<div id="restrictions-on-placement" class="section level3">
<h3>Restrictions on Placement</h3>
<p>Functions of certain types are restricted on scope of usage