[Xerces C++] Usage

[Gilles FILIPPINI]

Hello again,

I encounter some difficulties navigating into a DOM tree.
Let's say I have a DOM tree built from the following piece of XML :

<?xml version='1.0'?>
<MyStruct>
        <Level1>
                <Level2>foo</Level2>
                <Level2>foo1</Level2>
                <Level2>foo2</Level2>
                <Level2>foo3</Level2>
        </Level1>
        <Level1>
                <Level2>foo10</Level2>
                <Level2>foo11</Level2>
                <Level2>foo12</Level2>
        </Level1>
</MyStruct>

For each "Level1" element, I'd like to process all the "Level2" elements into 
it.

I know how to process each "Level1" element :

void MyClass::ProcessDocument(DOM_Document doc)
{
        DOM_NodeList dnl = doc.getElementsByTagName("Level1");
        for (unsigned int i = 0; i < dnl.getLength(); i++) {
                ProcessLevel1Element(dnl.item(i));
        }
}

But then, I don't know how to do to process "Level2" elements :

void MyClass::ProcessLevel1Element(DOM_Node l1)
{
        // I'd like to cast l1 into a DOM_Element to be able
        // to use getElementsByTagName("Level2") but it seems
        // impossible...
}

Did I miss a point ?
Thanks in advance.

- Gilles.