Defining a defined-url

Take for example the email address “+ myselfwhich␣could␣not␣be␣given␣(using␣``\cs{url}''␣or␣``\cs{verb}'')␣in␣aΩcaption␣or␣parbox␣due␣to␣the␣percent␣sign.␣This␣address␣can␣beΩpredefined␣withΩ{quote}Ω|myself␣+myselfΩquote}Ωand␣then␣you␣may␣use␣``\cs{myself}''␣instead␣ofΩ``++ myselfin␣an␣argument,␣and␣even␣in␣a␣moving␣argument␣like␣a␣caption␣because␣aΩdefined-url␣is␣robust.Ω