Reading Xpath element

[MarcoT77]

Hi Teacher.

I'm trying to get with Xpath the Product nodes in the following XML:
<?xml version="1.0" encoding="utf-8"?>
<PLMXML xmlns="http://www.plmxml.org/Schemas/PLMXMLSchema"
schemaVersion="5.1" date="2005-05-03" time="16:41:33" author="TcEng -
infodba@bridge(389284449)">
<Header id="id1" traverseRootRefs="#id2 #id11"
transferContext="exp_folder"></Header>
<Product id="id10" name="Ace" accessRefs="#id3" subType="Drawing"
productId="000002">
<ApplicationRef version="QRJJ3Vh1xNEIWA" application="TcEng"
label="QRJJ3Vh1xNEIWA"></ApplicationRef>
<UserData id="id33">
<UserValue type="reference" value="" title="owning_user"
dataRef="#id11"></UserValue>
<UserValue value="0-01-00T00:00:00" title="date_released"></UserValue>
<UserValue value="2005-05-03T14:00:32"
title="last_mod_date"></UserValue>
<UserValue type="reference" value="" title="last_mod_user"
dataRef="#id11"></UserValue>
<UserValue type="reference" value="" title="owning_group"
dataRef="#id27"></UserValue>
<UserValue value="2005-05-03T10:46:39"
title="creation_date"></UserValue></UserData></Product> (Continue...)

I've used the /PLMXML/Product query but I can't get anything.

I've also tried this simple xml:
<?xml version='1.0'?>
<Books>
<Book>
<Title>Beginning XML</Title>
<Publisher>Wrox</Publisher>
</Book>
<Book>
<Title>XML Step by Step</Title>
<Publisher>MSPress</Publisher>
</Book>
<Book>
<Title>Professional XML</Title>
<Publisher>Wrox</Publisher>
</Book>
<Book>
<Title>Developing XML solutions</Title>
<Publisher>MSPress</Publisher>
</Book>
</Books>

And on this Xml the rule /Books/Book works fine.

Why does not the first rule work?
Am I missing something?

Thanks in advance.
Marco.

[Philippe Poulard]

Ma******@gmail.com wrote:

Hi Teacher.

I'm trying to get with Xpath the Product nodes in the following XML:
<?xml version="1.0" encoding="utf-8"?>
<PLMXML xmlns="http://www.plmxml.org/Schemas/PLMXMLSchema"
schemaVersion="5.1" date="2005-05-03" time="16:41:33" author="TcEng -
infodba@bridge(389284449)">
<Header id="id1" traverseRootRefs="#id2 #id11"
transferContext="exp_folder"></Header>
<Product id="id10" name="Ace" accessRefs="#id3" subType="Drawing"
productId="000002">
<ApplicationRef version="QRJJ3Vh1xNEIWA" application="TcEng"
label="QRJJ3Vh1xNEIWA"></ApplicationRef>
<UserData id="id33">
<UserValue type="reference" value="" title="owning_user"
dataRef="#id11"></UserValue>
<UserValue value="0-01-00T00:00:00" title="date_released"></UserValue>
<UserValue value="2005-05-03T14:00:32"
title="last_mod_date"></UserValue>
<UserValue type="reference" value="" title="last_mod_user"
dataRef="#id11"></UserValue>
<UserValue type="reference" value="" title="owning_group"
dataRef="#id27"></UserValue>
<UserValue value="2005-05-03T10:46:39"
title="creation_date"></UserValue></UserData></Product> (Continue...)

I've used the /PLMXML/Product query but I can't get anything.
with XPath, unprefixed elements refers to elements that are not bound to
a namespace URI ; in XML, unprefixed elements may be bound to a
namespace URI ; this is the case in the document above, and not the case
in the document below
thus, /PLMXML gets the PLMXML element with no namespace URI, that
doesn't appear anywhere ; to get the PLMXML element bound to this
namespace URI "http://www.plmxml.org/Schemas/PLMXMLSchema", you must
declare a mapping between a prefix and the namespace URI :
plm -> "http://www.plmxml.org/Schemas/PLMXMLSchema"
and then use it in your XPath expression :
/plm:PLMXML/plm:Product
how to declare the mapping vary according to the XPath engine you use,
but people usually use it with XSLT ; with XSLT, namespaces declarations
are used by the XPath engine

I've also tried this simple xml:
<?xml version='1.0'?>
<Books>
<Book>
<Title>Beginning XML</Title>
<Publisher>Wrox</Publisher>
</Book>
<Book>
<Title>XML Step by Step</Title>
<Publisher>MSPress</Publisher>
</Book>
<Book>
<Title>Professional XML</Title>
<Publisher>Wrox</Publisher>
</Book>
<Book>
<Title>Developing XML solutions</Title>
<Publisher>MSPress</Publisher>
</Book>
</Books>

And on this Xml the rule /Books/Book works fine.

Why does not the first rule work?
Am I missing something?

Thanks in advance.
Marco.

--
Cordialement,

///
(. .)
-----ooO--(_)--Ooo-----
| Philippe Poulard |
-----------------------

[Martin Honnen]

Ma******@gmail.com wrote:

I'm trying to get with Xpath the Product nodes in the following XML:
<?xml version="1.0" encoding="utf-8"?>
<PLMXML xmlns="http://www.plmxml.org/Schemas/PLMXMLSchema"
schemaVersion="5.1" date="2005-05-03" time="16:41:33" author="TcEng -
infodba@bridge(389284449)"> I've used the /PLMXML/Product query but I can't get anything.

See
<http://www.faqts.com/knowledge_base/view.phtml/aid/34022/fid/616>

--

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

[Marco]

Thanks guys!

I'm using libxml2 libraries from C, and I solved the problem matching
nodes with name and namespace-uri attributes because I can't control
the xml format.

[David Carlisle]

This is a FAQ (you may want to see the xsl-list faq at
www.dpawson.co.uk)
<PLMXML xmlns="http://www.plmxml.org/Schemas/PLMXMLSchema"

That is an element with local name PLMXML and namespace http://www.plmxml.org/Schemas/PLMXMLSchema

I've used the /PLMXML/Product

That matches elements PLMXML and Product in no-namespace.

Add

xmlns:p="http://www.plmxml.org/Schemas/PLMXMLSchema"

to your xsl:stylesheet element and then use

/p:PLMXML/p:Product

To match elements in this namespace.

David