Specifies the name of the master session. The master session
is a logical entity that is used to coordinate session commands and
data consistency across multiple XRC sessions. A master session exists
as long as there is an XRC session coupled to the master session.
The maximum length of the name is eight characters. Do not include
embedded blanks. TSO ignores the leading blanks and the trailing blanks.
RELEASE
Indicates that all manual, operator-initiated actions have been
performed to protect the recoverable state of coupled XRC sessions
that are associated with the specified master session. The HOLD status
of the master session is to be removed.