from start tag A to end tag B

Hello,

I have the following input xml

<root>
	<p class="foo">
	...
	</p>

	<tag1/>
	...
	<tagN/>

	<p class="foo">
	...
	</p>
	...
</root>

I want to put all elements between <p class="foo"> start tags into a new
element called textItem. E.g.:

<root>
	<textItem>
		<p class="foo">
		...
		</p>

		<tag1/>
		...
		<tagN/>
	</textItem>
	<textItem>
		<p class="foo">
		...
		</p>
		...
	</textItem>
</root>

As XSL does not work on a tag basis (like SAX getStartTag()) nor line
basis I am not sure how to implment that.I am not even sure if there is
a chance to do that in XSL. Can you help?

Thanks in advance,

Robert