Changes

But trying It is not possible to mix different types of expressions in a query result. The outermost expression of a query must either be a collection of updating or non-updating expressions. Generally there is no way to perform any updating queries and return a result at the same time, except for using the BaseX-specific [[Database Module#db:output|db:output()]] function, which caches its argument at runtime and returns it after all updates have been processed. Trying to modify and return a DOM node within the same snapshot is another story. As changes on DOM nodes are non-persistent, you cannot access them in a subsequent query. This is where the [[Update#transform|transform expression]] comes into play.