liquidIngredientsInSoup.xq Example File
xmlpatterns/recipes/files/liquidIngredientsInSoup.xq
 
 (: All liquid ingredients form Mushroom Soup. :)
 declare variable $inputDocument external;
 doc($inputDocument)/cookbook/recipe[@xml:id = "MushroomSoup"]/ingredient[@unit = "milliliters"]/
 <p>{@name, @quantity, @unit}</p>