[
Lists Home |
Date Index |
Thread Index
]
At 2006-04-07 13:59 +0200, Philippe Poulard wrote:
>as everything is a node, one can match a node like this :
> node()
>which works well in the axis that are walking through the tree
>what about other axis ?
> @node()
> namespace::node()
>which would give the same as (respectively) :
> @*
> namespace::*
>and above all what about :
> @comment()
> @text()
> @p-i(target)
> namespace::comment()
> namespace::text()
> namespace::p-i(target)
>which are all empty if they are legal
>
>but are they legal ?
Absolutely. Even "/.." which is often used.
>(does an XPath parser must complain ?)
Not at all ... if it cannot find the node you asked for (which will
never be there), then you just get the empty node set.
>here are the last ones :
> /@*
> /namespace::*
>
>All are accepted with Jaxen
>I didn't read anything in the spec that makes them illegal
They are not illegal.
A location step in a location path has a syntax and if you follow the
syntax it is not illegal. If you try to address something that is
never there, it is not an error, but might very well be confusing to
the reader and maintainer of your stylesheet.
>Will you be hurted if someone (like me) was writting something like this :
> $foo/@bar/@oof
That will always return the empty set, since there is no attribute
axis off of an attribute axis.
I hope this helps.
. . . . . . . . . Ken
--
Registration open for XSLT/XSL-FO training: Wash.,DC 2006-06-12/16
Also for XML/XSLT/XSL-FO training: Birmingham, UK 2006-05-22/25
World-wide on-site corporate, govt. & user group XML/XSL training.
G. Ken Holman mailto:gkholman@CraneSoftwrights.com
Crane Softwrights Ltd. http://www.CraneSoftwrights.com/x/
Box 266, Kars, Ontario CANADA K0A-2E0 +1(613)489-0999 (F:-0995)
Male Cancer Awareness Aug'05 http://www.CraneSoftwrights.com/x/bc
Legal business disclaimers: http://www.CraneSoftwrights.com/legal
|
