Subject: Re: [xsl] Basic question about Namespace handling in XPath 1.0 (not necessarily related to XSLT)|
From: Prakash <prakash.subramaniam@xxxxxxxxxx>
Date: Wed, 28 Sep 2005 21:06:03 +0530
See the method setNamespaceContext() method on the interface javax.xml.xpath.XPath.
From: Prakash [mailto:prakash.subramaniam@xxxxxxxxxx] Sent: 28 September 2005 15:12
Subject: Re: [xsl] Basic question about Namespace handling in XPath 1.0 (not necessarily related to XSLT)
My question is not in relation to XSLT. I was talking about the namespace prefix resolution in general for XPath. For example, in Java, JAXP 1.3 has some APIs to process XPath given a context ( likewise DOM Level 3 has some APIs). These APIs are application independent. I guess, the namespace mappings available in scope to the context node will be the deciding factor, right?. Pls, correct me if I am wrong.
Geert Josten wrote:
The answer should be pretty clear, it all depends on how
the namespaces in your XSL stylesheet... :)XPath processor
1. If we have a XPath like "//sup:name", how will the
namespaces.know which "sup:name" will have to be returned? (considering that there are two sup:name elements that are in two different
/> will result in the first one.namespace
<xsl:value-of select="//sup:name" xmlns:sup="http://www.anothersuppliers.com" /> will result in the second one.
You will probably choose to assing prefix sup1 to the first
and sup2 to the second. If you want both, you can thensimply specify
//sup1:name|//sup2:name (or //*:name in XSLT 2.0 altogether)elements both
2. Similarly, if we have a XPath such as "//order", which "order" will be considered considering that there are two order
declared in thein default namespace (first order element is actually in null namespace whereas the second one in default namespace
stylesheets, though.root element)Likewise. I expect that //order results in the first when you don't specify a default namespace, and in the second if you use xmlns="http://www.customers.com".
It is adviced not to use default namespaces in XSL