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%preformat-elements; Preformatted Text Elements

Elements that may be included along with data characters inside the content model for the <preformat> element, in which whitespace, such as tabs, line feeds, and spaces, will be preserved.
Declaration
<!ENTITY % preformat-elements
                        "| %access.class; | %address-link.class; |
                         %display-back-matter.class; |
                         %emphasis.class; | %phrase.class; |
                         %subsup.class;"                             >
Expanded Declaration

| alt-text | long-desc | email | ext-link | uri | attrib | permissions | bold | fixed-case |italic | monospace | overline | roman | sans-serif | sc | strike | underline | ruby | abbrev | index-term | index-term-range-end | named-content | styled-content | sub | sup