Hi,
QuiP adheres to the XQuery draft published April 2002 which did not contain the ‘at’ clause in for expressions. W.r.t. functions, please refer to the respective F&O draft. As you noticed, QuiP does not implement all of these and, yes, data() is missing. text(), however, is not a function, but a node-test, please refer to the XPath draft for details. A function that converts items to text is string().
Regards,
Juliane.
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