<!--Reads a custom field from the sNN_BasketInfo table-->
<mvt:item name="customfields" param="Read_Basket( 'custom_field_code', l.settings:customfields )" />
<!--Writes a custom field to the sNN_BasksetInfo table-->
<mvt:item name="customfields" param="Write_Basket( 'custom_field_code', 'value' )" />