A variable name is a string between 1 and
long that satisfies the rules for PSPP identifiers
(see Tokens in PSPP Users Guide). Variable names are
mixed-case and treated case-insensitively.
Maximum length of a variable name, in bytes, currently 64.
Only one commonly useful function relates to variable names:
Returns var’s variable name as a C string.
A few other functions are much more rarely used. Some of these functions are used internally by the dictionary implementation:
Changes the name of var to new_name, which must be a “plausible” name as defined below.
This function cannot be applied to a variable that is part of a
dict_rename_var instead (see Dictionary Renaming Variables).
Returns the dictionary class of var’s name (see Dictionary Class).