conversion of xml document using XSL

["satish gvs" <gvs_sat@xxxxxxxxxxx>]

how to convert a given xml document to other xmldocument using XSL?

for example my XML document xmlA should be Converted to xmlB .how to write 
an XSL for this?

The following are the Xml documents xmlA and xmlB:

xmlA:
<invoice>
  <InvoiceHeader>
    <InvoiceDate>19990517</InvoiceDate>
    <ContractNumber>ABC124</ContractNumber>
  </InvoiceHeader>
  <ListOfInvoiceDetail>
      <InvoiceDetail>
         <BaseItemDetail>
           <LineItemNumber>1</LineItemNumber>
           <SupplierPartNum> SKU123  </SupplierPartNum>
           <Quantity>10  </Quantity>
         </BaseItemDetail>
         <InvoiceUnitPrice>13.95</InvoiceUnitPrice>
     </InvoiceDetail>
     <InvoiceDetail>
       <BaseItemDetail>
         <LineItemNumber>10</LineItemNumber>
         <SupplierPartNum> SKUABC</SupplierPartNum>
         <Quantity>12</Quantity>
       </BaseItemDetail>
       <InvoiceUnitPrice>15.75</InvoiceUnitPrice>
    </InvoiceDetail>
 </ListOfInvoiceDetail>
 <InvoiceSummary_r>
    <SubTotal_r>328.50</SubTotal_r>
    <Tax>26.947</Tax>
    <Total>355.437</Total>
 </InvoiceSummary>
</Invoice>

The output xml(i.e)xmlB should be as follows:

<Inv>
  <InvHead>
     <InvDate>19990517</InvDate>
  </InvHead>
  <InvDetails>
     <ItemNumber>1</ItemNumber>
     <PartNum> SKU123</PartNum>
     <Qty>10</Qty>
  </InvDetails>
  <InvDetails>
     <ItemNumber>10</ItemNumber>
     <PartNum> SKUABC</PartNum>
     <Qty>12</Qty>
  </InvDetails>
  <total>355.437</total>
</Inv>

END





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