The relation tells what the relation of load cases in the particular load group is.
Exclusive: Two load cases from the same load group of this type will never appear in the same combination.
Applicable for Load group types: Variable, Accidental, Seismic, Moving, Tensioning, Fire
Standard: It allows the user to sort load cases but it does not affect the process of generation of load case combinations.
Applicable for Load group types: All
Together: All load cases in the same load group of this type are always inserted into every new load case combination
Applicable for Load group types: Permanent