[xsl] Sorting using an element in a comma delimited string value

[amarjit.s.bhullar@xxxxxxxxxxxxx]

Hi:
I am trying to sort and group the following xml document. The output result
should be first sorted and grouped using the first element(eg 299) in the
<SupplierPartAuxiliaryID> tag  value 299,472967,3,,,,,. (comma delimited
string) and then sorted by the value from the <SupplierPartID> tag.

I am having problem extracting the first element from the comma delimited
string.

Could someone help me out ?

Thanks
Amarjit

Here is the XML document:
<?xml version="1.0" encoding="UTF-8"?>
<Cart>
    <ItemOut quantity="1"  lineNumber="1">
        <ItemID>
            <SupplierPartID>102200</SupplierPartID>
     <SupplierPartAuxiliaryID>299,472967,3,,,,,</SupplierPartAuxiliaryID>
        </ItemID>
        <ItemDetail>
               <UnitPrice>
                    <Money currency="CAD">24.9</Money>
               </UnitPrice>
          </ItemDetail>
    </ItemOut>
    <ItemOut quantity="2"  lineNumber="2">
        <ItemID>
            <SupplierPartID>102208</SupplierPartID>
     <SupplierPartAuxiliaryID>299,472967,4,,,,,</SupplierPartAuxiliaryID>
        </ItemID>
        <ItemDetail>
               <UnitPrice>
                    <Money currency="CAD">59.9</Money>
               </UnitPrice>
          </ItemDetail>
    </ItemOut>
    <ItemOut quantity="3"  lineNumber="3">
        <ItemID>
            <SupplierPartID>1030</SupplierPartID>

<SupplierPartAuxiliaryID>299,472967,5,N,N,N,,N</SupplierPartAuxiliaryID>
        </ItemID>
         <ItemDetail>
               <UnitPrice>
                   <Money currency="CAD">2.46</Money>
               </UnitPrice>
          </ItemDetail>
    </ItemOut>
    <ItemOut quantity="4"  lineNumber="4">
        <ItemID>
            <SupplierPartID>1040</SupplierPartID>

<SupplierPartAuxiliaryID>299,472967,2,Y,Y,Y,100,Y</SupplierPartAuxiliaryID>
        </ItemID>
        <ItemDetail>
               <UnitPrice>
                   <Money currency="CAD">5.84</Money>
               </UnitPrice>
          </ItemDetail>
    </ItemOut>
    <ItemOut quantity="3"  lineNumber="5">
        <ItemID>
            <SupplierPartID>1030</SupplierPartID>

<SupplierPartAuxiliaryID>289,472967,5,N,N,N,,N</SupplierPartAuxiliaryID>
        </ItemID>
         <ItemDetail>
               <UnitPrice>
                   <Money currency="CAD">2.46</Money>
               </UnitPrice>
          </ItemDetail>
    </ItemOut>
    <ItemOut quantity="4"  lineNumber="6">
        <ItemID>
            <SupplierPartID>1040</SupplierPartID>

<SupplierPartAuxiliaryID>289,472967,2,Y,Y,Y,100,Y</SupplierPartAuxiliaryID>
        </ItemID>
        <ItemDetail>
               <UnitPrice>
                   <Money currency="CAD">5.84</Money>
               </UnitPrice>
          </ItemDetail>
    </ItemOut>
    <ItemOut quantity="3"  lineNumber="7">
        <ItemID>
            <SupplierPartID>1030</SupplierPartID>

<SupplierPartAuxiliaryID>292,472967,5,N,N,N,,N</SupplierPartAuxiliaryID>
        </ItemID>
         <ItemDetail>
               <UnitPrice>
                   <Money currency="CAD">2.46</Money>
               </UnitPrice>
          </ItemDetail>
    </ItemOut>
    <ItemOut quantity="4"  lineNumber="8">
        <ItemID>
            <SupplierPartID>1040</SupplierPartID>

<SupplierPartAuxiliaryID>292,472967,2,Y,Y,Y,100,Y</SupplierPartAuxiliaryID>
        </ItemID>
        <ItemDetail>
               <UnitPrice>
                   <Money currency="CAD">5.84</Money>
               </UnitPrice>
          </ItemDetail>
    </ItemOut>
</Cart>

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