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Some invoices are no longer paper-based, but rather transmitted electronically over the Internet. It is still common for electronic remittance or invoicing to be printed in order to maintain paper records. Standards for electronic invoicing varies widely from country to country. Use of the XML message format for electronic invoices has begun in recent years. There are two standards currently being developed. One is the cross industry invoice under development by the United Nations standards body UNCEFACT and the other is UBL (Universal Business Language).