chickadee » uri-generic » authority?

uri-authority URIprocedure
uri-scheme URIprocedure
uri-path URIprocedure
uri-query URIprocedure
uri-fragmentprocedure
uri-host URIprocedure
uri-port URIprocedure
uri-username URIprocedure
uri-password URIprocedure
authority? URI-AUTHprocedure
authority-host URI-AUTHprocedure
authority-port URI-AUTHprocedure
authority-username URI-AUTHprocedure
authority-password URI-AUTHprocedure

If a component is not defined in the given URI, then the corresponding accessor returns #f, except for uri-path, which will always return a (possibly empty) list.