distinct filtering

Greetings folks.  I'm brand new to the list, and have only been into xsl for
the last week and a half here, so I hope I don't come across as completely
clueless.

I have an xml Document that looks like the following:

<PAGE_INFO>
	<ORDER>
		<REQUEST>
			<REQUIREMENT listsequence="1">
				<PROMPT>prompt 1</PROMPT>
			</REQUIREMENT>
			<REQUIREMENT listsequence="2">
				<PROMPT>prompt 2</PROMPT>
			</REQUIREMENT>
		</REQUEST>
		<REQUEST>
			<REQUIREMENT listsequence="2">
				<PROMPT>prompt 2</PROMPT>
			</REQUIREMENT>
			<REQUIREMENT listsequence="3">
				<PROMPT>prompt 3</PROMPT>
			</REQUIREMENT>
		</REQUEST>
	</ORDER>
</PAGE_INFO>

I am trying to display the data in the <PROMPT> tag of each requirement, but
I need to somehow filter the data so that I only display each list sequence
once. In other words, I want to display

prompt 1
prompt 2
prompt 3

I am using Microsofts 3.0 xsl parser to transform the document to html on
the server, before sending the document to the browser.

Gareth Suarez
gareths@xxxxxxxx  


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