Ori Doolman wrote:
Hello,
I'm quite new to Xalan and Xpath, and I have a problem extracting a node
text from an XML document.
I'm trying to extract the text node of CheckCustomerPINResult in the
following document:
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";>
<soap:Body>
<CheckCustomerPINResponse
xmlns="http://www.SigValue.com/SVCrm";>
<CheckCustomerPINResult>xyz</CheckCustomerPINResult>
<ErrCode>1234</ErrCode>
</CheckCustomerPINResponse>
</soap:Body>
</soap:Envelope>
I'm trying the following test using the supplied example:
SimpleXPathAPI.exe d:\response.xml /
/soap:Envelope/soap:Body/CheckCustomerPINResponse/CheckCustomerPINResult
/text()
But I get no output.
I noticed that if I remove the default namespace from
CheckCustomerPINResponse or even if I use a prefix like
<CheckCustomerPINResponse
xmlns:myprefix="http://www.SigValue.com/SVCrm";> then I do get the right
value 'xyz'.
I tried reading the mailing lists and searched the internet, but still
didn't find a way to extract the text() when the default namespace
exist.
The only suggested solutions are changing the document to have a prefix.
This is something I cannot do, because the document is not generated by
me. It is a response from a soap server.
This is a FAQ:
http://xml.apache.org/xalan-j/faq.html#faq-N101EE
http://www.dpawson.co.uk/xsl/sect2/N5536.html#d6682e1012
Another thing I don't understand: why should I use the 'soap' prefix at
all? For as much as I know the prefix is arbitrary and what really
important is the URI. Therefore, I expected that the following
expression (assuming I remove the default namespace) would work too, but
it doesn't.
In an XPath expression, the prefix is _not_ arbitrary. If you remove the
default namespace, it doesn't affect the elements in the SOAP namespace.
/Envelope[namespace-uri()='http://schemas.xmlsoap.org/soap/envelope/']/B
ody[namespace-uri()='http://schemas.xmlsoap.org/soap/envelope/']/CheckCu
stomerPINResponse/CheckCustomerPINResult/text()
Isn't this expression equivalent to the first one I wrote above?
No. You need to understand namespaces:
http://www.dpawson.co.uk/xsl/sect2/N5536.html
If you really want to use the namespace-uri() function, you could use
something like this:
/*[local-name() = 'Envelope' and
namespace-uri()='http://schemas.xmlsoap.org/soap/envelope/']/*[local-name()
= 'Body' and
namespace-uri()='http://schemas.xmlsoap.org/soap/envelope/']/CheckCu
stomerPINResponse/CheckCustomerPINResult/text()
Dave
