Inline Display Class Elements
Non-block display elements that set or display inline with the text. Just like Inline Display Class Elements, but without the <alternatives> element. This is for use in mixes that already include alternatives via some other means (it is not valid in XML DTD syntax to have the same element type more than once within an OR content group).
<!ENTITY % inline-display-noalt.class "inline-graphic | private-char" >