Re: XML Namespace Definitions on Non-Root Elements
Re: XML Namespace Definitions on Non-Root Elements
- Subject: Re: XML Namespace Definitions on Non-Root Elements
- From: Matt Neuburg <email@hidden>
- Date: Sat, 05 Mar 2011 12:27:12 -0800
On Fri, 04 Mar 2011 14:25:06 -0600, Heath Borders <email@hidden> said:
>I'm trying to parse a document with a namespace declared on a non-root element:
>
><root><example:foo xmlns:example="http://example.com/foo";>This is an
>exemplary foo!</example:foo></root>
>
>I can read this xml into an NSXMLDocument just fine, but the following
>XPath query on root returns a non-nil, but empty NSArray:
>
>NSXMLNode *rootNode = ...// create my root node somehow
>NSArray *exampleFooElements = [rootNode
>nodesForXPath:@"/root/example:foo" error:nil];
>// exampleFooElements != nil && [exampleFooElements count] == 0
>
>However, if I add the namespace declaration to the root element,
>everything is fine:
>
><root xmlns:example="http://example.com/foo";><example:foo>This is an
>exemplary foo!</example:foo></root>
>
>NSXMLNode *rootNode = ...// create my root node somehow
>NSArray *exampleFooElements = [rootNode
>nodesForXPath:@"/root/example:foo" error:nil];
>// exampleFooElements != nil && [exampleFooElements count] == 1
>
>I can do this change programmatically, but I'd rather not have to
>modify the document. This namespace usage should be legal. Am I
>doing something wrong?
It's no use just saying "example:"; you have to have a way to tell it what "example:" *is* - i.e. you have to bind the namespace - and you don't have a way to do that from here. One option is to bypass the namespace altogether:
nodesForXPath:@"//*[local-name()='foo']"
m.
--
matt neuburg, phd = email@hidden, <http://www.apeth.net/matt/>
A fool + a tool + an autorelease pool = cool!
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