Runtime expressions ABNF clarifications

[adamaltman]

Should name be at least one character?

Example: ABNF defines a "$steps." name as a possible runtime expression. Are expressions like $steps. valid? Or does there have to be at least one character after the "$steps."?

Example change to ABNF for Runtime Expressions:

name = 1*CHAR ; Ensures 'name' is at least one CHAR

In a related question, the ABNF is silent on allowed characters in CHAR. Should that be defined for clarity? Are carriage returns and line feeds allowed? In my thoughts, they wouldn't be allowed.