XOM API for Processing XML with Java

[lenards AT email.arizona.edu]

Hello,

I'm trying to define a xsi:schemaLocation attribute on a response document 
that
I'm producing.  The code adds the "xsi" namespace prior to adding the 
qualified
xsi:schemaLocation attribute, but I still get a NamespaceConflictException.

My application is using xom-1.1. The stack trace doesn't include any of the
dependencies, so I'll just mention I'm using Xerces 2.7.1.

The code is extremely pedestrian to me:
---------------------------------------

Element root = new Element(ContentElements.ROOT_RESPONSE, NS);
root.addAttribute(new Attribute("xsi:schemaLocation",
     "http://www.foo.org/transfer/content/0.6
http://services.foo.org/schema/content_0_6.xsd";));

---------------------------------------

The exception states: "Attribute prefixes must be declared."

And the nu.xom portion of the stacktrace is:

# nu.xom.Attribute._setNamespace(Attribute.java:516)
# nu.xom.Attribute.<init>(Attribute.java:168)
# nu.xom.Attribute.<init>(Attribute.java:70)

I've looked in the tutorial section on namespaces
(http://xom.nu/tutorial.xhtml#d0e335) and that code is using prefixes with
registering them in the mathml example.

So I figured that the prefixing was something people wanted and it was changed
such that you need to register the namespace prefix. I tried that:

---------------------------------------

Element root = new Element(ContentElements.ROOT_RESPONSE, NS);
root.addNamespaceDeclaration("xsi",
     "http://www.w3.org/2001/XMLSchema-instance";);
root.addAttribute(new Attribute("xsi:schemaLocation",
     "http://www.foo.org/transfer/content/0.6
http://services.foo.org/schema/content_0_6.xsd";));
// that string is on one line... my email client is wrapping it for some 
reasons

---------------------------------------

Same expection - nu.xom.NamespaceConflictException "Attribute prefixes must be
declared"

So I went back to the tutorial and realized this: "You never have to worry 
about
adding xmlns and xmlns:prefix attributes. XOM always handles that for you
automatically."

I thought I'd unit test the example in my environment to make sure it wasn't a
classpath or dependency issue.  I can run the mathml example without any 
issue.

I figure there the fact that "xsi" is a w3c standard, maybe this garners 
special
treatment.  But, I can't find any XOM examples that have the 
xsi:schemaLocation
defined and I would expect the usage of it to be quite common.

Can someone tell me where I'm stuffing up? I'm running out of ideas quickly.

Thanks in advance,

Andy


/****************************************
 * @author:  Andrew Lenards
 * @email:   lenards AT email.arizona.edu
 * @title:   Systems Programmer, Principal
 * @project: Tree of Life Web Project
 * @website: http://tolweb.org/
 * @dept:    Dept. of Entomology
 * @school:  University of Arizona
 * @geo-loc: Tucson, AZ 85721
 ***************************************/