XPath query for <?define something="something" ?>

[=?ISO-8859-1?Q?Pekka_J=E4rvinen?=]

Hi,

How I can find <?something ?stuff?

XML:
<Wix>
<?define UpgradeCode="{foobar-quux-xyzzy}"?>
<?define Manufacturer="Company"?>
<!-- update this ALWAYS -->
<?define PackageCode="REPLACE"?>
</Wix>

How to match that REPLACE with XPath? Or even better: find only define
and PackageCode
Doesn't work:
/Wix[processing-instruction('define[@PackageCode='REPLACE']')]
/Wix[processing-instruction('define')/[@PackageCode='REPLACE']/
@PackageCode]
/Wix[processing-instruction('define')/[@PackageCode='REPLACE']]/
@PackageCode
/Wix[processing-instruction('define[@PackageCode='REPLACE']')/]/
@PackageCode

Works:
/Wix[processing-instruction('define')[3]]

But PackageCode isn't necessary always third.

[Bjoern Hoehrmann]

* Pekka Järvinen wrote in comp.text.xml:

>How I can find <?something ?stuff?

XML:
<Wix>
<?define UpgradeCode="{foobar-quux-xyzzy}"?>
<?define Manufacturer="Company"?>
<!-- update this ALWAYS -->
<?define PackageCode="REPLACE"?>
</Wix>

How to match that REPLACE with XPath? Or even better: find only define
and PackageCode
Doesn't work:
/Wix[processing-instruction('define[@PackageCode='REPLACE']')]
/Wix[processing-instruction('define')/[@PackageCode='REPLACE']/
@PackageCode]
/Wix[processing-instruction('define')/[@PackageCode='REPLACE']]/
@PackageCode
/Wix[processing-instruction('define[@PackageCode='REPLACE']')/]/
@PackageCode

These do not work because the processing instruction data is simply a
string, there are no attributes, they just look like them. You have to
access the data by querying the PI's string value, so e.g.

//processing-instruction('define')[ . = 'PackageCode="REPLACE"']

This would find all <?define PackageCode="REPLACE"?nodes. To parse
the string value use functions like substring-before() and substring().
--
Björn Höhrmann · mailto:bj****@hoehrmann.de · http://bjoern.hoehrmann.de
Weinh. Str. 22 · Telefon: [phone] · http://www.bjoernsworld.de
68309 Mannheim · PGP Pub. KeyID: 0xA4357E78 · http://www.websitedev.de/

[Richard Tobin]

In article <8f**********************************@k13g2000hse. googlegroups.com>,
Pekka Järvinen <pe************@gmail.comwrote:

><?define PackageCode="REPLACE"?>

The stuff in the <?define ... ?is not an attribute. It's just some
text that looks like an attribute. You can match it as text:

processing-instruction("define")[. = 'PackageCode="REPLACE"']
or
processing-instruction("define")[contains(., "REPLACE")]

-- Richard
--
:wq