title: Universal xml standard for sales receipts (Point of Sale)
body: <p>Are there any universal standards (schemas) for storing/exchanging sales receipts in xml?</p>
  
  <p>For Invoices and orders there exist eg. cXML or UBL but I couldn't find any similar standards for sales receipts. </p>
  
  <p>I need to generate the xml from Point of Sale and rather than creating my custom schema I would rather have it compatible with existing standards if there are any.</p>