Table 1.

Employed context information probes with data description and possible data values.

Probe	Descriptions	Context Mapping	Data Values
Location	User's mobile location	LOC	0–unknown
			1–home
			2–at work
Ambient volume	Ambient audio features	AMB	0–silent
			1–low volume
			2–high volume
Physical activity	User's physical activity	ACT	0–not active
			1–low activity
			2–high activity
Call status	User's current mobile phone call status	ACT	0–idle
			1–ringing
			2–in a call
Ringer status	User's current mobile phone ringer status	ACT	0–silent
			1–vibrator
			2–normal
PC keys	PC keys pressed	ACT	0–not active
			1–low activity
			2–high activity
PC backspace keys	PC backspace keys pressed	ACT	0–not active
			1–low activity
			2–high activity
PC clicks	PC mouse clicks	ACT	0–not active
			1–low activity
			2–high activity