Figure 2.

Usage of protocols by field and through time. Protocol networks for the years 1996, 2000 and 2005. Nodes represent individual protocols and are sized according to the number of times they were used. Each node is also a pie chart describing the proportion of all uses of that protocol by each field group. Edges denote an F-measure value of greater than 0.75 phylogenetic term similarity between the protocols. The networks shown are the largest connected component after the F-measure threshold was applied.