If you haven't already, check out this guy's growing treasure trove of writing:
http://sites.google.com/site/yacoset/
Many of his articles have been posted on HN and elsewhere already.
http://sites.google.com/site/yacoset/
Many of his articles have been posted on HN and elsewhere already.
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<Package ShipMethod="UPS" Tracking="1Z123467WW53631"/>
</Order>
</LineItem>
<LineItem LineNumber="2" SKU="654321">
<Order Number="555444">
<Package ShipMethod="UPS" Tracking="1Z123467WW53631"/>
</Order>
</LineItem>
</Shipments>
The designer of this schema was on crack.