Feature #7811
Updated by Reynaud Sylvain over 9 years ago
Example:
<pre><code class="xml">
<argument name="arg" valid="view('accepted-values')/*/*[@value=$arg]"/>
</code></pre>
NOTE: This may replace attribute @pattern
<pre><code class="xml">
<argument name="arg" valid="regexp:test($arg, 'my-regular-expression')"/>
</code></pre>