There is very little difference between a token (or set of tokens) and the expressed value of an aspect. So '::UNWord::bits' is identical to '32'.
aspect-value ::= aspect (value|type|label) (aspect identifier)...
Although a smart parser would not need the starting '::', the target of the Ocean syntax is to use as little forward scanning as possible. It is also much clearer for the programmer.
Caveat: the definition above is correct, but could also be specified
aspect (value|type|label) aspect identifier
and allow recursive resolution (as the result of an aspect is either a value, a type, or a label!)