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<td>W3C XQuery Update Facility 1.0</td>
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<td>The mechanism (if any) by which an external function can return an XDM instance and/or a pending update list to the invoking query.</td>
219
<td>Zorba allows external functions to be implemented in C++. Such functions may return XDM instances. Moreover, external functions declared as updating may return pending update lists generated by any updating expression. However, it's not possible to create new update primtives and return those.</td>
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<td>W3C XQuery Update Facility 1.0</td>