From: Stijn Vansummeren <stijn.vansummeren@luc.ac.be>

Date: Mon, 17 Nov 2003 10:45:40 +0100

To: www-ql@w3.org

Message-Id: <200311171045.40381.stijn.vansummeren@luc.ac.be>

Date: Mon, 17 Nov 2003 10:45:40 +0100

To: www-ql@w3.org

Message-Id: <200311171045.40381.stijn.vansummeren@luc.ac.be>

I have a question concerning the XQuery data model (as described in the formal semantics), and the dynamic semantics of step expressions (also as described in the formal semantics). Suppose that the variable $dot is bound to the following value: element dummy of type T1 { 42 of type xs:integer } What would the result be of child::node()? Is it 42 of type xs:integer or is it the empty sequence? More specifically, what is is value2 in dynEnv |- axis child:: of element dummy of type T1 { 42 of type xs:integer } => Value2 And what is Value3 in dynEnv |- test node() with element of Value2 => Value3 As far as I can see, the axis judgement only returns element child content in this case, which would result in the empty sequence. Even if it did return the value 42 of type xs:integer, the test judgement would return the empty sequence, since 42 of type xs:integer is an atomic value, not a node. If this reasoning is correct, how would I be able to obtain the entire child value of the value above? Is it true that the dynamic semantics of step expressions cannot handle atomic values, and therefore does not work on the entire data model? Or is atomic data viewed as being a text node when applying a step expression? --Stijn Vansummeren Limburgs Universitair Centrum Universitaire Campus Gebouw D 3590 Diepenbeek BelgiumReceived on Monday, 17 November 2003 04:48:40 UTC

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