XP

Combat logs don't include XP, so players running the Hammerlog addon record it. Kill XP is the typical amount (the median) without the rested bonus, at the player's level then - it drops as you outlevel a mob. In a group the XP is split (with a bonus for three or more), so kills made alone are shown unless you pick otherwise; elites, worth more, have rows of their own. Kills recorded before Hammerlog 65 didn't say whether you were in a group, and count as alone.