XPath beginners question

[Mike P]

I have limited experience of XML and I am trying to use XPath to get at
all <tag4> elements given a certain value for <tag3> (see my example
below :

<?xml version="1.0" encoding="ISO-8859-1"?>
<tag1>
<tag2>
<tag3>
<tag4>
<tag4>
<tag4>
</tag2>
<tag2>
<tag3>
<tag4>
<tag4>
</tag2>
</tag1>

Any assistance would be really appreciated.
Cheers,

Mike

*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!

[Martin Honnen]

Mike P wrote:

I have limited experience of XML and I am trying to use XPath to get at
all <tag4> elements given a certain value for <tag3> (see my example
below :

<?xml version="1.0" encoding="ISO-8859-1"?>
<tag1>
<tag2>
<tag3>
<tag4>
<tag4>
<tag4>
</tag2>
<tag2>
<tag3>
<tag4>
<tag4>
</tag2>
</tag1>

You are missing a lot of closing tags above, also <tag3> elements do no
even have a content so it is not clear what you want to regard as the
value of <tag3>.

Assuming you had the following XML

<?xml version="1.0" encoding="UTF-8"?>
<tag1>
<tag2>
<tag3>Kibology</tag3>
<tag4 />
<tag4 />
<tag4 />
</tag2>
<tag2>
<tag3>whatever</tag3>
<tag4 />
<tag4 />
</tag2>
<tag2>
<tag3>Kibology</tag3>
<tag4 />
<tag4 />
</tag2>
</tag1>

and wanted to look for all <tag4> elements that have a preceding sibling
<tag3> element with the content (value) Kibology you could use the
following XPath expression:

/tag1/tag2/tag4[preceding-sibling::tag3 = 'Kibology']
--

Martin Honnen
http://JavaScript.FAQTs.com/

[Marrow]

Hi Mike,

Try...

/tag1/tag2[tag3 = 'foo']/tag4

HTH
Marrow
http://www.marrowsoft.com - home of Xselerator (XSLT IDE and debugger)
http://www.topxml.com/Xselerator
"Mike P" <mr*@telcoelectronics.co.uk> wrote in message
news:%2****************@TK2MSFTNGP10.phx.gbl...

I have limited experience of XML and I am trying to use XPath to get at
all <tag4> elements given a certain value for <tag3> (see my example
below :

<?xml version="1.0" encoding="ISO-8859-1"?>
<tag1>
<tag2>
<tag3>
<tag4>
<tag4>
<tag4>
</tag2>
<tag2>
<tag3>
<tag4>
<tag4>
</tag2>
</tag1>

Any assistance would be really appreciated.
Cheers,

Mike

*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!