SOAP Request in plsql webservices

Question

In the below SOAP Request example,
What this means
<ns1:getRate xmlns:ns1="urn:xmethods-CurrencyExchange"
soap_request:= '<?xml version = "1.0" encoding = "UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<SOAP-ENV:Body>
<ns1:getRate xmlns:ns1="urn:xmethods-CurrencyExchange" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<country1 xsi:type="xsd:string">us</country1>
<country2 xsi:type="xsd:string">uk</country2>
</ns1:getRate>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope

Answer 1

More detail
When i give
http_req := utl_http.begin_request(url, 'POST','HTTP/1.1');
I get this Error
-------utl_http.get_response---------------------
http_resp.status_code is :500
http_resp.reason_phrase is :Internal Server Error
http_resp.http_version is :HTTP/1.1
http_resp.private_hndl is :1
-------utl_http.get_response----------------------
And also i get this error when i use POST
<?xml version="1.0" encoding="UTF-8"?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><soapenv:Body><soapenv:Fault><faultco
apenv:Server.userException></faultcode><faultstring>org.xml.sax.SAXParseException: Attribute name "xmlns:impl" associated with an element type "impl:soapCheckRequest" must be followed by the ' = ' character.</faultstring><detail><n
stname xmlns:ns1="http://xml.apache.org/axis/">atlcmsispq02.iss.net</ns1:hostname></detail></soapenv:Fault></soapenv:Body></soapenv:Envelope>
But when i give GET responce is OK
http_req := utl_http.begin_request(url, 'GET','HTTP/1.1');
-------utl_http.get_response---------------------
http_resp.status_code is :200
http_resp.reason_phrase is :OK
http_resp.http_version is :HTTP/1.1
http_resp.private_hndl is :2
-------utl_http.get_response---------------------
What is the difference between GET and POST ?
Also i get below error when i use GET
ORA-31011: XML parsing failed
ORA-19202: Error occurred in XML processing
LPX-00245: extra data after end of document
Error at line 2
ORA-06512: at "SYS.XMLTYPE", line 0
ORA-06512: at line 53
This is what i am using for XMLType
resp:= XMLType.createXML(soap_respond);
resp:= resp.extract('/soap:Envelop/soap:Body/child::node()'
, 'xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"'
Please help me.
Thanks,
Srikanth