<!ENTITY % disp-formula-elements
                        "| %all-phrase; | %abstract.class; |
                         %access.class; | %break.class; | 
                         %caption.class; |
                         %display-back-matter.class; | %id.class; | 
                         %kwd-group.class; | %subj-group.class; |
                         %label.class; |
                         %simple-display-noalt.class;"               >

| email | ext-link | uri | inline-supplementary-material | related-article | related-object | hr | bold | fixed-case | italic | monospace | overline | overline-start | overline-end | roman | sans-serif | sc | strike | underline | underline-start | underline-end | ruby | alternatives | inline-graphic | inline-media | private-char | chem-struct | inline-formula | tex-math | mml:math | abbrev | index-term | index-term-range-end | milestone-end | milestone-start | named-content | styled-content | fn | target | xref | sub | sup | x | abstract | alt-text | long-desc | break | caption | attrib | permissions | object-id | kwd-group | subj-group | label | array | code | graphic | media | preformat