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let $x := <mult>{ $a * $breturn <a>{$x}</amult>
→Assigning Variables
declare variable $a as xs:integer external;
declare variable $b as xs:integer external;
</pre>
<pre class="brush:xml">
<query xmlns="http://basex.org/rest">
<text><![CDATA[
declare variable $x as xs:integer external;
declare variable $y as xs:integer external;
<mult>{ $x a * $yb }</mult> ]]></text> <variable name="xa" value="21"/> <variable name="yb" value="2"/>
</query>
</pre>
