29333 2015-12-11 16:48:21 +0000 Higher-order functions and updates. 2016-03-22 09:53:29 +0000 1 1 1 Unclassified XPath / XQuery / XSLT Functions and Operators 3.1 Candidate Recommendation PC Windows NT CLOSED WORKSFORME P2 normal --- 1 christian.gruen mike public-qt-comments oldest_to_newest 124421 0 christian.gruen 2015-12-11 16:48:21 +0000 In the XQFO spec – or in the XQUF spec? – it should probably be mentioned what is going to happen if an updating function is supplied to a higher-order function. Examples: apply(function() { delete node <a/> }, []) for-each-pair( <a/>, 'a.xml', function($node, $uri) { fn:put($node, $uri) } ) Maybe XPTY0004 could be raised? 124521 1 mike 2016-01-05 15:55:02 +0000 XQuery Update 3.0 states: A FunctionTest without an updating function assertion only matches simple functions as it does in unextended XQuery 3.0. The signature of higher-order functions defined in F+O does not include an updating function assertion, and therefore updating functions cannot be supplied as arguments to functions such as apply() and for-each-pair(). Since the spec states that an updating function "is not matched", I think this implies that XPTY0004 is raised. 124522 2 mike 2016-01-05 16:22:06 +0000 The WG agreed with my response, and decided to close as WORKSFORME. Please re-open if you think we've got it wrong.