Retrieve records based on condition from xml using XPATH

Hi all,
I have a table form_content where there are two columns - form_content_id (numeric) and xml_content (clob). The structure of xml_content is
<RAF xmlns="http://www.abnamro.com/WCS/GCEG/KRT">
<XBorderRAF>
<ClientProfile isBranch="1" isBusinessAddressDifferent="1" isSubsidiary="0" regDate="2009-09-01">
<RegisteredAddress city="test" country="GB" nameOfContactPerson="3454545" street1="test" telephoneNumber="34534545"/>
</ClientProfile>
</XBorderRAF>
</RAF>
I want to retrive all form_contant_id from form_content table where country is 'GB' inside RegisteredAddress tag.
I am able to retrive all form_content_id with country value using below query,
SELECT form_content_id,
extractValue(xmltype(xml_content),'/RAF/XBorderRAF/ClientProfile/RegisteredAddress/@country', 'xmlns="http://www.abnamro.com/WCS/GCEG/KRT"')
as registerAddress
from
form_content
but I am finding it difficult to reterive records based on any condition..
SELECT form_content_id,
extractValue(xmltype(xml_content),'/RAF/XBorderRAF/ClientProfile/RegisteredAddress/@country', 'xmlns="http://www.abnamro.com/WCS/GCEG/KRT"')
as registerAddress
from
form_content
where
(extractValue(xmltype(xml_content),'/RAF/XBorderRAF/ClientProfile/RegisteredAddress/@country', 'xmlns="http://www.abnamro.com/WCS/GCEG/KRT"')='GB'
Please help me to resolve this problem. ....
Thanks

Ok, thaks to all who looked this query, I found the answer
select form_content_id
from xmltest
where existsnode(xmltype(xml_content), '/RAF/XBorderRAF/ClientProfile/RegisteredAddress[@country="GB"]','xmlns="http://www.abnamro.com/WCS/GCEG/KRT"') = 1;

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Retrieve records based on condition from xml using XPATH

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