# 6. Parameter value syntax (init. file)¶

We list below group and subgroup keywords, as well as parameter values required in the initialisation file (see Initialisation file).

## 6.1. Group/subgroup keywords¶

We list below all the subgroups and the associated groups used in USINE.

Note

TemplSpectrum and TemplSpatialDist are the only groups for which the user can modify the subgroup names: the latter define template names that can be referred to for instance for source spectra. See Edit source, transport….

## 6.2. Parameters¶

We recall that the syntax of a parameter is group @ subgroup @ parameter @ M=? @ value, and we specify here in particular,

• whether a parameter is multi-valued (M=1) or not (M=0)
• the parameter’s usage with its syntax and/or [unit] and/or example