Formula, Display

A mathematical equation, expression, or formula that is to be displayed as a block (callout) within the narrative flow. This is not a “formula” in the strict mathematical sense but can be used for any mathematical expression.


This element may contain the actual characters that make up an equation or formula, or a graphic that contains the formula. Thus, the mathematics can be expressed as ASCII characters; MathML expressions; or as a graphic or series of graphics.


content-type Type of Content
id Identifier
specific-use Specific Use

Related Elements

For a mathematical equation, expression, or formula which is to be displayed inline with the text, use the <inline-formula> element.

Content Model

<!ELEMENT  disp-formula %disp-formula-model;                         >

Expanded Content Model

(#PCDATA | alt-text | long-desc | email | ext-link | uri | break | bold | italic | monospace | overline | roman | sc | strike | underline | attrib | permissions | alternatives | inline-graphic | chem-struct | inline-formula | label | mml:math | graphic | media | preformat | sub | sup)*


Any combination of:

This element may be contained in:

<app>, <bio>, <body>, <boxed-text>, <disp-formula-group>, <fig>, <license-p>, <named-content>, <p>, <sec>, <styled-content>, <td>, <th>


<p>... This can be seen in the following summation:
<mml:mover accent='true'>