HP XP P9000 Command View Advanced Edition Software Licenses - Manual (Page 246)

WWN is essential for defining the SANtinel™ parameters because it determines
whether the open systems host is to be allowed or denied access to a specified
logical unit or a group of logical units.
WWN nickname World wide name nickname. A name that is set for the WWN of an HBA that
identifies which HBA to operate on. The WWN nickname easily identifies
accessible HBAs that are registered in a host group. You can display a list of
WWN nicknames to confirm target HBAs for a host while you edit LUN paths
during or after volume allocation or when you replace an HBA.
WWPN Worldwide port name
XML Extensible Markup Language
Glossary 246