Subject: Re: [xsl] Is this correct: " A sequence of more than one item is not allowed as the first argument of dynamic function call " From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Tue, 17 Jun 2014 14:14:34 -0000 |
Hi Michael, Thank you for the explanation. I found the same immediately after posting the initial message and then posted another, asking to disregard the first. What was/is confusing, though, was/is the error message. I believe it can be improved to provide more information. Finally, and most importantly, do get well soon. Dimitre On Tue, Jun 17, 2014 at 5:27 AM, Michael Kay mike@xxxxxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > You declared $g to expect a single item as its argument, but in the call $g($x), $x is bound to a sequence of more than one item. Even though $g is bound to a function (reverse#1) that accepts multiple items, I think the function coercion rules expect the call to satisfy the declared type. > > Michael Kay > Saxonica > mike@xxxxxxxxxxxx > +44 (0118) 946 5893 > > > > On 15 Jun 2014, at 00:45, Dimitre Novatchev dnovatchev@xxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > >> I have this transformation: >> >> <xsl:stylesheet version="3.0" >> xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> >> <xsl:template match="/"> >> <xsl:sequence select= >> "function($f as function(item()*) as item(), >> $g as function(item()) as item()*, >> $x as item()* >> ) as item()* >> { $f($g($x)) } >> (head#1, reverse#1, ('H','e','l','l','o')) >> "/> >> </xsl:template> >> </xsl:stylesheet> >> >> When I use BaseX to evaluate the XPath 3.0 expression that is >> specified in the "select" attribute of the <xsl:sequence> above, I get >> the expected, correct result: >> >> "o". >> >> However, when I run this transformation with the Saxon-EE 9.5.1.3 from >> within Oxygen, I get this error: >> >> Severity: fatal >> Description: XPTY0004: A sequence of more than one item is not allowed >> as the first argument of dynamic function call ("H", "e", ...) >> URL: http://www.w3.org/TR/xpath20/#ERRXPTY0004 >> >> I have never heard of any such limitation before, haven't seen such a >> rule in any specification and cannot find any reasons for such >> limitation. >> >> Could someone, please, explain if this behavior is a bug, or not? If >> this is correct behavior, what is the rationale behind this >> limitation?
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