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[xsl] XPATH 1.0: Selecting an element attribute starting from a self:: attribute


Subject: [xsl] XPATH 1.0: Selecting an element attribute starting from a self:: attribute
From: "Malecki, Piotr piotr.malecki@xxxxxxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 17 Jun 2015 14:27:54 -0000

Hello,

The question corresponds basically to XPATH 1.0 (not 2.0 , not XSL).

I have an XML like this (snippet only):

<library>
            <catalog>
                        <book id="_1" name="Book1"/>
                        <book id="_2" name="Book2"/>
                        <book id="_3" name="Book3"/>
            </catalog>
            <customer>
                        <borrowed bookId="_1"/>
                        <borrowed bookId="_2"/>
            </customer>
</library>

In an application (Windows WPF / XAML), my execution context is e.g. the
element "borrowed" (e.g. <borrowed bookId="_1"/>).

I have to find the name of the book which is referenced as bookId.

So my XPATH expression is like this:
"//book[@id=self::*/@bookId]/@name"

Read as: give all books whose id equals to the bookId of the current node.

The Query  is executed for the "borrowed" node (execution context).

Unfortunately the expression doesn't return the result expected (rather an
empty set).

What is wrong in my understanding here?

Thank you
regards
Piotr


Mit freundlichen Gr|_en / Kind regards

Dipl.-Ing. Piotr Malecki

Systemingenieur / Systems Engineer
Waffen und F|hrung Systemintegration
Weapon, Command & Control System Integration
Operating Unit Surface Vessels

ThyssenKrupp Marine Systems GmbH
Hermann-Blohm-Strasse 3 - 20457 Hamburg- Germany
P:O.Box 10 07 20 - 20005 Hamburg - Germany

Phone: +49 (0) 431 / 700 2446
Fax: +49 (0) 431 / 700 1600 2446

Mailto:piotr.malecki@xxxxxxxxxxxxxxxx

ThyssenKrupp Marine Systems GmbH
Chairman of the Supervisory Board: Dr. Hans Christoph Atzpodien
Executive Board: Andreas Burmester (Chairman), Dieter Rottsieper, Dr. Walter
Klausmann, Torsten Kvnker
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