I WAS going to allow a connecting punctuation between the number and the identifier in a vector component token, but now think I will allow white space. Yup, the token can have white space. Why not. (I could go as far as to allow white space in identifiers. But I am not going that far. Algol 68 may allow spaces, but we are following a more Ada-like design for identifiers, though not with case-folding. Case-folding is too variable across languages.)