I do believe the rest of the alerts (where configurable thresholds are) fall under component alerts
this is excerpt from one of my alerts::
Component: Top Indexes for Database (NetPerfMon)
App: MSSQLSERVER
Component Msg:
Statistic Data:
AlertName: WarningSW - Component Warning
AppID: 644
CompID: 5308
Threshold Settings (if set):
Name: SQLBB_Indexes_Fragmentation
PollFrequency: 600