OID value: 188.8.131.52.4.1.10471.1
The value of this field is a URL of a PDF document. The URL of the certificate practice statement contains a filename comprising of a SHA1 checksum in hexadecimal notation followed by ".pdf". After downloading this document, please validate its integrity by calculating its SHA1 hash with your favourite crypto toolkit and making sure it matches.
URL for further info: http://openfortress.nl/doc/OID/184.108.40.206.4.1.10471.html#1
See also the OID Repository website reference for 220.127.116.11.4.1.10471.1