Extract data from database to xml ?

is there any API, classes or tools ready to extract data from oracle database and generate xml files, Instead to implement a DOM class and build little by little the xml file??
thanks for every info in advance.

Yes, download the Oracle XML Development Kit from Oracle's website and look at the documentation of the XML-SQL Utility.

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                     ssch := c_pay.subsidy;
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                     ssch_total := 0;
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                  grand_total  := grand_total  + c_pay.amount;              
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                                                    ||'~'|| c_pay.bank
                                                    ||'~'|| c_pay.bank_branch
                                                    ||'~'|| c_pay.account_type
                                                    ||'~'|| c_pay.subsidy
                                                    ||'~'|| c_pay.programme)
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                                                                ||'~'||c_pay.FROM_ACCOUNT_DESCR                    
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                                                                ||'~'||c_pay.BENEFICIARY_ACCOUNT_NUMBER
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                                                                ||'~'||c_pay.BENEFICIARY_STATEMENT_DESC            
                                                                ||'~'||c_pay.AMOUNT;                                
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                 dat := lpad('~',16,'~');
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                 dat := lpad('~',16,'~');
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              dat := lpad('~',16,'~');
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           dat := utility.put_field(1,'Grand Total:' ,dat,'~');
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                  client_text_io.put_line(fil1, lpad(' ',2000));
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