The 'Pattern' tag will defined a pattern object. A pattern, as every Kazimir objects has a name to identify it, and is also defined by the
name of the log where it should occur and the regexp that defined the pattern. All the keywords are mandatory.
Name : the name of the pattern
RegExp : the regular expression that defines the pattern
Log : the name of the log where the pattern can be found.
Examples:
Pattern: Name = NoError; RegExp =NoError; Log = my_log
Pattern: Name = CriticalOrMajor ; RegExp =CRIT|MAJOR ; Log = my_other_log
