roll_out_capabilities.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<caps>
	<!-- device attributes -->
	<cap>id</cap>
	<cap>user_agent</cap>
	<!-- device capabilities -->
  <cap>preferred_markup</cap>

	<!-- for sql: field type -->
  <cap type="int(11)">resolution_width</cap>
</caps>