Exception in XML parsing

Question

Hi all,
I am trying to extract value from XMLType column and Update the same with diff harcoded value.
Can anyone please check whats going wrong here.
If I use Xpath upto '/CoverageForm/Details/Clauses/' it works fine.
If I use '/CoverageForm/Details/Clauses/mms:Deductible' it gives me below error
ORA-31011: XML parsing failed
ORA-19202: Error occurred in XML processing
LPX-00601: Invalid token in: '/CoverageForm/Details/Clauses/mms:Deductible'
31011. 00000 - "XML parsing failed"
*Cause:    XML parser returned an error while trying to parse the document.
*Action:   Check if the document to be parsed is valid.
Sql query :
select extract(P.BENCHMARKING_XML,'/CoverageForm/Details/Clauses/mms:Deductible/mms:DeductibleAmount')
FROM table1 p
where ID = 145;
XML:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<CoverageForm xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:mms="http://www.marsh.com/policy/mms">
<Details>
<Clauses mms:id="1">
<mms:Deductible>
<mms:DeductibleValue>
<mms:DeductibleAmount>12000.0</mms:DeductibleAmount>
<mms:DeductibleAmountType>Amount</mms:DeductibleAmountType>
</mms:DeductibleValue>
</mms:Deductible>
</Clauses>
</Details>
</CoverageForm>

Answer 1

e.g.
SQL> ed
Wrote file afiedt.buf
  1  with t as (select xmltype('<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
  2  <CoverageForm xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:mms="http://www.marsh.com/policy/mms">
  3    <Details>
  4      <Clauses mms:id="1">
  5        <mms:Deductible>
  6          <mms:DeductibleValue>
  7            <mms:DeductibleAmount>12000.0</mms:DeductibleAmount>
  8            <mms:DeductibleAmountType>Amount</mms:DeductibleAmountType>
  9          </mms:DeductibleValue>
10        </mms:Deductible>
11      </Clauses>
12    </Details>
13  </CoverageForm>') as xml from dual)
14  --
15  -- END OF TEST DATA
16  --
17  select updatexml(t.xml
18                  ,'/CoverageForm/Details/Clauses/mms:Deductible/mms:DeductibleValue/mms:DeductibleAmount/text()'
19                  ,'100.50'
20                  ,'xmlns:mms="http://www.marsh.com/policy/mms') as new_xml
21* from t
SQL> /
NEW_XML
<?xml version="1.0" encoding="WINDOWS-1252" standalone='yes'?><CoverageForm xmlns:xs="http://www.w3.
org/2001/XMLSchema" xmlns:mms="http://www.marsh.com/policy/mms"><Details><Clauses mms:id="1"><mms:De
ductible><mms:DeductibleValue><mms:DeductibleAmount>100.50</mms:DeductibleAmount><mms:DeductibleAmou
ntType>Amount</mms:DeductibleAmountType></mms:DeductibleValue></mms:Deductible></Clauses></Details><
/CoverageForm>
SQL>
{code}