%block-display-noalt.class; Display Class No Alternatives Elements

The same content as the block display class parameter entity (%block-display.class;) minus the <alternatives> element. This parameter entity is used for a graphic or other image-related element, whenever the use of the ordinary block display class parameter entity (%block-display.class;) would cause a duplication or where alternatives are not allowed.
<!ENTITY % block-display-noalt.class
                        "answer | answer-set |
                         boxed-text | chem-struct-wrap | code |
                         explanation | 
                         fig | graphic | media | preformat | 
                         question | question-wrap | 
                         question-wrap-group |
                         supplementary-material | table-wrap"        >