Clipboard events created by Endpoint agent on copy action.
If a Response Rule is defined to block on the clipboard an incident is generated during the copy action. After the incident is generated, if you try to copy to a different file the clipboard will be empty the action will be blocked.
NOTE: Both cases an incident is created, but the behavior of paste is different.
Symantec Data Loss Prevention Endpoint Prevent
Symantec Data Loss Prevention Endpoint Discover