From MorphOS Library
RXSET [Rexx] - Adds a (name,value) pair to the Clip List
NAME - name of the pair VALUE - value of the pair
Name strings are assumed to be in mixed case. If a pair with the same name already exists, its value is replaced with the current string. If a name without a value string is given, the entry is removed from the Clip List. If RXSET is invoked without arguments, it will list all (name, value) pairs in the Clip List.