1. A system, comprising: an input system for receiving strokes representing digital ink; and a processor system for: (a) grouping temporally consecutive strokes into an initial temporal line grouping, wherein at least a portion of each stroke within the initial temporal line grouping is located within a first predetermined distance of another stroke in that initial temporal line grouping, and (b) grouping temporally consecutive initial temporal line groupings into one or more final temporal line groupings, wherein at least a portion of each initial temporal line grouping within the final temporal line grouping is located within a second predetermined distance of another initial temporal line grouping in that final temporal line grouping.