2001-05-20T07:21:00Z 2002-05-20T07:21:00Z 123456789 uri:example.com/services/buyerService HTTP HTTP SSL HTTP SMTP 5 30 P1D http://www.w3.org/2000/09/xmldsig# http://www.w3.org/2000/09/xmldsig#sha1 http://www.w3.org/2000/09/xmldsig#dsa-sha1 S/MIME DES-CBC 987654321 uri:example.com/services/sellerService HTTP HTTP SSL 5 30 P1D http://www.w3.org/2000/09/xmldsig# http://www.w3.org/2000/09/xmldsig#sha1 http://www.w3.org/2000/09/xmldsig#dsa-sha1 S/MIME DES-CBC http://www.ebxml.org/namespaces/messageService http://www.w3.org/2000/09/xmldsig http://ebxml.org/processes/buysell.xsd buy/sell agreement between example.com and contrived-example.com