XML File Creation in Perl

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Root1      TBLA      KEY1      COLA      A    B    
Root1      TBLA      KEY1      COLB      D    E    
...
Root2      TBLB      KEY4      COLX      M    N     
Root2      TBLB      KEY4      COLD      A    B   
Root3      TBLC      KEY5      COLD      A    B

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Root1      TBLA      KEY6    
Root2      TBLB      KEY7    
Root3      TBLC      KEY8

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Root1      TBLA      KEY9    
Root1      TBLA      KEY10    
Root3      TBLC      KEY11

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   <Data>    
    <Root1>
...
        </TBLA>
    </Root1>        
    <Data>

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