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Re: [XQuery 1.1] XML-mapping support and explicit parallel FLWOR

From: Michael Kay <mike@saxonica.com>
Date: Tue, 21 Sep 2010 09:59:55 +0100
Message-ID: <4C98740B.9070602@saxonica.com>
To: Semyon Chertkov <semyonc@gmail.com>
CC: public-qt-comments@w3.org
  On 21/09/2010 9:36 AM, Semyon Chertkov wrote:
> for $v in $r/column1
>                     return <A>{ $v/text() } </A>
as:

<A[column1]>{text()}</A>

Note that you can already write

column1/<A>{text()}</A>

The only problem with this is that "/" sorts into document order, which 
in the case of newly constructed nodes is implementation-dependent. If 
we had a "simple mapping operator" (say "\", as has been proposed and 
rejected in the past), then I think

column1\<A>{text()}</A>

would be equivalent to your suggestion and far more general in its 
capability. (It's essentially a "for" expression that sets the context 
item rather than a range variable).

Michael Kay
Saxonica
(personal response only)
Received on Tuesday, 21 September 2010 09:00:27 GMT

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