Jane -- the name of someone's daughter;
War and Peace -- the title of a novel;
W803631VATN -- a serial number engraved on a laptop computer;
http://www.example.com/foo/bar.html -- the URL of a web page;
If an identifier is supported or "broken", that refers to the association; when an identifier is acted upon, that refers to its string. See keystr as related to an actionable identifier string.