(required).
2. One or many **instrumentation points** in source code or binary
program (tracepoint name, address, symbol name, function name,
- logger name, etc.) to be executed (required).
+ logger name, amongst other types of probes) to be executed (required).
3. A **log level** (each instrumentation point declares its own log
level) or log level range to match (optional; only valid for user
space domain).