eventlog command question

[woisch]

Hi,

little question. What did this command do?

({Template_Windows_VM:eventlog[System].logseverity(4)}=4)&({Template_Windows_VM:eventlog[System].nodata(30)}#1)

Template_Windows_VM:eventlog[System].logseverity(4)}=4
This is for logging the system eventlog HIGH messages

And for what is this -> {Template_Windows_VM:eventlog[System].nodata(30)}#1

thanks
woisch