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, TeX, or LaTeX expressions; or as a graphic or series of graphics.

A display equation may numbered, using automatic numbering or by storing the number in a <label> element.


alternate-form-of Alternate Form of Graphic, Media Object, Etc.
id Identifier

Related Elements

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

Model Information

Content Model

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


Any combination of:

This element may be contained in:

<abstract> Abstract; <ack> Acknowledgments; <app> Appendix; <app-group> Appendix Group; <body> Body of the Article; <boxed-text> Boxed Text; <disp-quote> Quote, Displayed; <fig> Figure; <gloss-group> Glossary Group; <glossary> Glossary Elements List; <named-content> Named Special (Subject) Content; <notes> Notes; <p> Paragraph; <> Reference List (Bibliographic Reference List); <sec> Section; <supplementary-material> Supplementary Material; <td> Table Data Cell (XHTML table model); <term> Definition List: Term; <th> Table Header Cell (XHTML table model); <trans-abstract> Translated Abstract

Tagged Example

<p>...Selected as described for Acc-29 
<tex-math id="M1"><![CDATA[\documentclass[12pt]{minimal}
\DeclareFontShape{T1}{linotext}{m}{n} { &#x003C;-&#x003E; linotext }{}
</disp-formula> TER1/ter1-Acc: Acc-29 crossed with ...</p>...