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. in for

From: David Carlisle <davidc@nag.co.uk>
Date: Fri, 4 Jan 2002 17:08:26 GMT
Message-Id: <200201041708.RAA22328@penguin.nag.co.uk>
To: www-xpath-comments@w3.org
CC: xsl-list@lists.mulberrytech.com

The expression in the return clause of a for expression is evaluated
with the focus being the same as the focus at the start of the for
expression.

In particular this means that . (and relative path expressions)
work in a rather unexpected way. 

given an expression such as

for $i in widget return exp

then 99 times out of 100, this will be a user-error and what was intended
was

for $i in widget return $i/exp

with exp being evaluated relative to the innermost bound variable from
the for expression. 

Is there a technical issue preventing for changing the context in which
the return expression is evaluated?

This would make the behaviour of for more like that of / and xsl's
for-each.

David

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Received on Friday, 4 January 2002 12:10:23 GMT

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