I'm a noob on parsing, learning about it, so it's possible I've made a mistake somewhere.

I know there's this page: https://docs.python.org/3/reference/grammar.html

Which is a full listing of Python's grammar. However, looking at this page: https://docs.python.org/3/reference/lexical_analysis.html I see rules that aren't written there, like longstringitem.

I'm guessing that's because these are lexing rules, while the former was a list of parsing rules?

If that's the case, shouldn't there also be a full, authoritative list of Python's lexical rules? Possibly alongside the parsing rules?