The standard defines
-basic source character set
-basic execution character set and it's wide char counterpart
It also defines 'execution character set' and it's wide char counterpart as follows
$2.2/3- "The execution character set and the execution wide-character set are supersets of the basic execution character set and the basic execution wide-character set, respectively. The values of the members of the execution character sets are implementation-defined, and any additional members are locale-specific."
Q1. I don't think I understand this completely, particularly the last statement. Any pointers on this aspect?
Further,
$3.9.1 - "Objects declared as characters (char) shall be large enough to store any member of the implementation’s basic character set."
Q2. In 3.9.1 the phrase 'basic character set' means 'basic execution character set'?