The following key is used for the web links to the DR files

e + EL^{CHR +}(CORE) - COUP

where

EL = Element symbol

CHR = Charge of recombining ion

CORE = Core excitation for datafile

COUP = Coupling for data (ICR = Intermediate coupling with relativistic corrections turned on,

IC = Intermediate coupling and LS = LS coupling)

for example

e + Al^{12 +}(12) - IC

means recombination of Al^{12 +}, calculated using intermediate coupling, and including data for n=1 to 2 core excitations in the DR process.