XML/XQuery/last

Example of the last function

   <source lang="xml">

File: Data.xml <orders>

 <order name="B" xml:base="http://wbex.ru/ACC/">
   <car id="0003" href="prod0003.html"/>
   <car id="0002" href="prod0002.html"/>
 </order>
 <order name="A" xml:base="http://wbex.ru/WMN/">
   <car id="0001" href="prod0001.html"/>
 </order>

</orders> File: Query.xquery let $order := doc("Data.xml")/order for $prod in $order/car return concat($prod/id,

           (if ($prod is $order/car[last()]) then (".") else (", ")))
</source>