I've been grappling with that distinction too. All knowledge starts at the individual level. So accordingly, it begins with 'tacit' knowledge and eventually gets disseminated throughout the group via 'explicit' knowledge. Or as tacit knowledge gets disseminated, it becomes explicit. Now here's the twist.
Explicit knowledge is 'tacit' information.
Further, explicit information is 'tacit' data, and finally we have explicit data. So the two endpoints of this KM spectrum are tacit knowledge and explicit data. How all these trasfomations take place involves dynamics like bifurcation points, chaos into order, and context between value patterns. What it involves, is that these pairs represent bifurcation points of the knowledge variety.