Reading XML file generated through XMLGEN

Hi,
I have the following problem and I hope someone can give me an advise.
I generated a simple XML document through the packages XMLGEN.
This document is stored in a table in CLOB column.
After this document has been processed (changed) from the web server's ASP pages, I want to read this (changed) XML document (again in the a table in a CLOB)
to compare it against relational data.
There is not external DTD or schema of this XML.
I was thinking to read the elements from the XML/CLOB one-by-one and process them as needed.
I'm reading already over one week the Oracle manuals, but I can't find any good samples that would help me.
Does anyone know a nice PL/SQL sample to solve this problem?
Here is a sample of the XML data:
>>>>>>>>>
?xml version="1.0"?>
<Subscriber-Detail>
<Subscriber>
<Member-ID>0250149556</Member-ID>
<DIVISION-ID>003</DIVISION-ID>
<UNIT-ID>004</UNIT-ID>
<Last-Name>PUBLIC</Last-Name>
<First-Name>JOE</First-Name>
<Birthday_DT>29/06/1961</Birthday_DT>
<Address>2200 PEATON PLACE</Address>
<City>WOLVERHAMPTON</City>
<Salary>71500.00</Salary>
<Smoker_YN>Y</Smoker_YN>
</Subscriber>
</Subscriber-Detail>
<<<<<<<
Environment: Oracle 9i R2 - no JAVA, pure PL/SQL
Any help much appreciated.
TIA
Thanks
Fred

Will these help ?
How to use PL/SQL to read and manipulate data from a xml file
How to Read XML tags....

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