Help generating and validating an xml document

[Jean-Noël Colin <jn...@gmail.com>]

Hi

I'm quite new to xerces, and having problems with basic operations: I have defined an XML Schema (xsd) with a specific namespace for the defined types and elements. 

Then, I need to create an XML document (by adding nodes, etc), and then, to validate the document against the schema. 

Using Oxygen, I manage to generate the following XML sample from the schema. It properly uses namespaces (although I'm wondering whether ns1: prefix should not also appear in front of all elements.

<?xml version="1.0" encoding="UTF-8"?>
<ns1:position xmlns:ns1="http://info.fundp.ac.be/infob318/2009/projetg"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://info.fundp.ac.be/infob318/2009/projetg file:/Users/jnc/Documents/workspace/GServer/WebContent/WEB-INF/gserver.xsd">
    <longitude>0</longitude>
    <latitude>0</latitude>
    <timeStamp>-1073741773</timeStamp>
</ns1:position>


Using xerces, I'm getting the following:

<?xml version="1.0" encoding="UTF-16"?>
<position xmlns="http://info.fundp.ac.be/infob318/2009/projetg">
<longitude>3.5</longitude>
<latitude>4.5</latitude>
<altitude>5.5</altitude>
<timestamp>1265112364510</timestamp>
</position>

So i have several questions:
why doesn't xerces include also the other schema (xsi) and schemaLocation?
why are the namespace definitions included in the element and not in the root (<?xml...)

The code used to generate the above xml is presented below, and I'm attaching the .xsd

Thanks a lot for your help

Best regards

Jean-Noël Colin
		DocumentBuilder docBuilder = null;
		try {
			docBuilder = factory.newDocumentBuilder();
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		document = docBuilder.newDocument();
		Element positionElement = document.createElementNS("http://info.fundp.ac.be/infob318/2009/projetg", "position");
		Element element;
		element = document.createElement("longitude");
		element.setTextContent(String.valueOf(3.5));
		positionElement.appendChild(element);
		element = document.createElement("latitude");
		element.setTextContent(String.valueOf(4.5));
		positionElement.appendChild(element);
		element = document.createElement("altitude");
		element.setTextContent(String.valueOf(5.5));
		positionElement.appendChild(element);
		element = document.createElement("timestamp");
		element.setTextContent(String.valueOf(Calendar.getInstance()
				.getTimeInMillis()));
		positionElement.appendChild(element);
		document.appendChild(positionElement);