Sort & Max simultaneous operations

Hi All, 
	I have a xml  which has the structure below. I need to pick the rows with attribute distinct C1 & the corresponding max attribute of C2 ...  What is the best way to the same ? 

Input xml :

<PickList>
    <TotalRows>33</TotalRows>
    <Columns C1="Deposit" C2="Period" C3="Status" C4="Value Date" C5="Maturity Date" C6="Deposit No"/>
    <Tags>ctlMskDepositNo *</Tags>
    <Rows>
        <Row C1="1" C2="1" C3="Closed " C4="23/10/2003" C5="23/04/2004" C6="1"/>
        <Row C1="1" C2="2" C3="Closed " C4="23/10/2003" C5="23/04/2004" C6="2"/>
        <Row C1="1" C2="3" C3="Closed " C4="23/10/2003" C5="23/04/2004" C6="3"/>
        <Row C1="1" C2="4" C3="Closed " C4="23/10/2003" C5="23/04/2004" C6="4"/>
        <Row C1="1" C2="5" C3="Matured " C4="23/10/2003" C5="23/04/2004" C6="5"/>
        <Row C1="1" C2="6" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="6"/>

        <Row C1="2" C2="1" C3="Closed" C4="23/10/2003" C5="23/04/2004" C6="7"/>
        <Row C1="2" C2="2" C3="Closed" C4="23/10/2003" C5="23/04/2004" C6="8"/>
        <Row C1="2" C2="3" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="9"/>
        <Row C1="2" C2="3" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="10"/>
        <Row C1="3" C2="1" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="11"/>
        <Row C1="4" C2="1" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="12"/>
        <Row C1="5" C2="1" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="13"/>

        <Row C1="5" C2="8" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="13"/>
        <Row C1="5" C2="6" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="11"/>
        <Row C1="5" C2="7" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="12"/>
    </Rows>
</PickList>


the reqd output:

<Rows>
<Row C1="1" C2="6" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="6"/>
<Row C1="2" C2="3" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="9"/>
<Row C1="2" C2="3" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="10"/>
<Row C1="3" C2="1" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="11"/>
<Row C1="4" C2="1" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="12"/>
<Row C1="5" C2="8" C3="Open" C4="23/10/2003" C5="23/04/2004" C6="12"/>
</Rows>

Thank you,

Regards,
aruniima





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