EventMajorType=1

Web URL.

EventMajorType=2

Summary of sender/recipients of the mail (maximum 5 recipients).
i.e. sender(s) | recipient(s)

EventMajorType=3

File system path to the application executable.

EventMajorType=4

Summary of participants in IM conversation (maximum 5 active and 5 passive participants)

EventMajorType=5

The original location or the source of the file. The details of this field depend on the EventMinorType as follows …

Host machine or IP address | file path

Microsoft Exchange server name | Exchange public folder

Microsoft Sharepoint server name | document path

Data source name (from connection string) | SQL Query of source data

source machine or IP addr | target machine or IP addr

Host machine | file path

print server name | printer location \ printer name

Not Used.