p capture</em>.
It groups all values returned by <code>patt</code>
into a single capture.
The group may be anonymous (if no name is given)
or named with the given name.
</p>

<p>
An anonymous group serves to join values from several captures into
a single capture.
A named group has a different behavior.
In most situations, a named group returns no values at all.
Its values are only relevant for a following
<a href="#cap-b">back capture</a> or when used
inside a <a href="#cap-t">table capture</a>.
</p>


<h3