say a z c a.[a] a.[z] a.[z+1] HERE
a.[c] c.[a] a.[fred] y.[a,z]
I think this is not very well described in rexref.
I would suggest to add
Before this sentence:
The  method with no arguments will return the currently associated default value.
This little description and examples:
Tails for compound variables are normally specified by symbols separated by periods.
An alternative is to specify the tail as a bracketed list of expressions separated by commas.
The expressions are evaluated to character strings-
These are concatenated with intervening periods and the resulting string is used as tail.
This notation can be used in assignments to compound variables as well as when referencing them.
a.[1+2,3+4]=17 / tail used: 3.7 /
Say a.3.7 / => 17 /
a.v1.v2=18 / tail used: '1+2.3+4' /
Say a.['1+2','3+4'] / => 18 /
Parse Value '1 2 3' With . a.[1,1+1] .
Say a.1.2 / => 2 /
posted on 17Nov2013 to 'Open Object Rexx Developer Mailing List' email@example.com and there endorsed by Rick :-)
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