1.8 Vendor-Extensible Fields
Within the version 7 and version 11 license response packet, vendors are free to add any well-formed XML data to the <META> element. The contents of this element are not used by the Digital Rights Management client application.
This protocol uses Win32 error codes. These values are taken from the Windows error number space defined in [MS-ERREF] section 2.2. Vendors SHOULD reuse those values with their indicated meaning. Choosing any other value runs the risk of a collision in the future.