Re: nodesForXPath almost always returns no objects
Re: nodesForXPath almost always returns no objects
- Subject: Re: nodesForXPath almost always returns no objects
- From: Ryan Homer <email@hidden>
- Date: Tue, 9 Jan 2007 10:03:22 -0500
I found this information: http://www.w3schools.com/xml/
xml_namespaces.asp
The XML Namespace (xmlns) Attribute
The XML namespace attribute is placed in the start tag of an element
and has the following syntax:
xmlns:namespace-prefix="namespaceURI"
When a namespace is defined in the start tag of an element, all child
elements with the same prefix are associated with the same namespace.
Note that the address used to identify the namespace is not used by
the parser to look up information. The only purpose is to give the
namespace a unique name. However, very often companies use the
namespace as a pointer to a real Web page containing information
about the namespace.
Try to go to http://www.w3.org/TR/html4/.
----
So, this is only used to give a unique name and some people/companies
use the namespace to give further information, but it seems that it
is not a requirement. However, the syntax is somewhat different. They
are using the following format:
<h:table xmlns:h="http://www.w3.org/TR/html4/";>
<h:tr>
<h:td>Apples</h:td>
<h:td>Bananas</h:td>
</h:tr>
</h:table
So, they are defining a namespace called "h". In my example, it is:
<FindMembershipResponse xmlns="http://www.msn.com/webservices/
AddressBook">
Does anyone know the difference? If we're not defining a new
namespace, why the xmlns tag?
Ryan
On 9-Jan-07, at 12:12 AM, Stephen Deken wrote:
<FindMembershipResponse xmlns="http://www.msn.com/webservices/
AddressBook">
</FindMembershipResponse>
Am I getting the syntax wrong? Any ideas? Thanks in advance.
While I don't profess to know how to solve it, the problem appears
to be the 'xmlns' attribute on this element. Without it, the query
works as expected.
I'd be interested to learn how to solve this one myself. Is it
only because the mentioned URI is a 404?
Stephen Deken
email@hidden
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