XPATH restricting preceding nodes

Hi,

I have something like the following XML document:

<top>
	<page>
		<entry text='aaa'/>
		<entry text='bbb'/>
		<entry text='aaa'/>
	</page>
	<page>
		<entry text='ccc'/>
		<entry text='bbb'/>  ***
		<entry text='ccc'/>		
	</page>
</top>

I only want to select entries with the same text once for each page.
For the first page I want to get only one aaa-entry and one bbb-entry.
For the second page I want to get only one ccc-entry and ond bbb-entry.

I did this with the following XPATH expression :
	<xsl:for-each select="ancestor::page/descendant::entry[not(@text = preceding::entry/@text)]">

but then I don't get the bbb-entry for the second page. 
I cannot figure out a way to restrict the preceding::entry result set to the current page.
What am I doing wrong?

Thanks

..............................

Erwin Kloeck
Produktentwicklung

Oestreicher + Wagner 
Medientechnik GmbH
Frankenthaler Strasse 20
D-81539 Muenchen

Fon   +49 (0)89-68961 216 
Fax   +49 (0)89-68961 271


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