Names elements that may be used inside elements that are really expected to be data characters (#PCDATA) and not to contain any of these things
This Parameter Entity is even simpler than the %simple-phrase; Parameter Entity. Note that there are no links.
<!ENTITY % simple-text "| %emphasis.class; | %inline-display.class; | %inline-math.class; | %phrase.class; | %subsup.class; " >
articleauthcustom-mixes.ent