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16 bytes added ,  16:36, 8 December 2010
===Returning Results===
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 as you cannot access your own changes during a single query. Regarding database nodes, dividing a single you can update your nodes within the first query into an updating and a non-updating query solves this issueaccess modifications in subsequent queries.
Trying But 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 transform expression comes into play.
===Function Declaration===
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