QName vs NCName

Question

Hi Everyone,
I hope I'm not posting this in the wrong forum. I have a 3 questions regarding QName and NCName in an XML document:
1. In an XML document, if an element belongs to a namespace, can I still include it as NCName if its name does not clash with a name from the default namespace.
2. As far as XML elements are concerned, do only elements belonging to default namespace can be included as NCNames? I guess the answer to this question also depends on the answer to the first question. Meaning if I can include an element that does not belong to the default namespace without the prefix associated with its namespace, then that would mean that it is possible to include that name as NCNames.
3. Since we never colonize attribute names, then attribute names are always NCNames. Is this correct?
Thanks for your time and response,
Mehrdad

Answer 1

Thanks for your reply. You are quiet correct in your assumption that I still don't quiet understand issues regarding namespaces. Your reply definitely answered my question regarding including attributes using QName;
To make my other question more clear, I will use the following example:
<?xml version="1.0"?>
<!DOCTYPE root SYSTEM "root.dtd">
<root
xmlns:h="http://www.w3.org/TR/html4/"
xmlns:f="http://www.w3schools.com/furniture">
<h:table>
<h:tr>
<h:td>Apples</h:td>
<h:td>Bananas</h:td>
</h:tr>
</h:table>
<f:table>
<f:name>African Coffee Table</f:name>
<f:width>80</f:width>
<f:length>120</f:length>
</f:table>
*<wood>*
*<type>redwood</type>*
*</wood>*
</root>
Suppose the the element <wood> Note that the element <wood> is supposed to be in the http://www.w3schools.com/furniture namespace, but I have included it without a namespace prefix. Would this invalidate the xml document?
Maybe you can confirm/clarify this for me as well. I think I had the wrong assuption about NCNames and thought that only elements belonging to the default namesapce can be included as NCNames. However, right now, I think that any element regardless of whether they belong to the default namespace or not, can be included as either NCNames or QName.
Thanks again for taking the time to respond to me.