parsedXML tutorial

Hi,
I just discovered the parsedXML tool you are developping.
So I've got a couple of questions?

Is there a tutorial (PDF or else)?

I'd like to handle XML document like the following (don't mind the validity
there):

<Doc>
	<Elt1>
		<SubElt1>xxxxxxxxx</SubElt1>
		<SubElt2>xxxxxxxxx</SubElt2>
		<SubElt3>
			<sub_sub_Elt1>xxxxxx</sub_sub_Elt1>
		</SubElt3>

	</Elt1>

</Doc>

Is it possible to handle such document easily with parsedXML (getting a list
of subelements, number of subelements)?
how?


thanks