<!-- params.items = ['a', 'b', 'c'] -->
<for iterate="params.items" index="i" value="ii">
  <value>params.items[i]</value>
</for>
<!-- abc -->

<!-- if (params.items && params.items.length)-->
<for iterate="params.items" index="i" value="v">
  <value>v</value>
</for>
<!-- abc -->
<!-- /if -->
<elseif test="foo">
  foo text
</elseif>
<elseif test="bar">
  bar text
</elseif>
<else>
  else text
</else>
