Distribution of log(gf) vs. Δ log(gf) (SpectroWeb–BRASS) for the SpectroWeb (2008) and BRASS (2012) parametric cross-match. For clarity and consistency a small number of transitions with |Δ log (gf)| > 2 have been excluded. In some extreme cases these Δlog(gf) values can be as large as Δlog(gf)  ± 4 dex. Compared to the other non-parametric cross-matches in Figs. 2 and 3 we see a substantial increase in scatter caused mainly by updates to the literature, but also due to the lack of J-values to further constrain the parametric cross-match.