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<disp-formula-group> Formula, Display Group

Container element for equations or other mathematical expressions.

Usage/Remarks

Best Practice

This element should be used for a group of equations or other mathematical expressions to be displayed together; it should not contain only a single equation or expression.
Equations within such groups may be given a single group number, numbered individually, or both.
Attributes
content-type
specific-use

Base Attributes

id
xml:base
xml:lang
Models and Context
May be contained in
<answer>, <app>, <bio>, <body>, <boxed-text>, <disp-formula-group>, <explanation>, <fig>, <license-p>, <named-content>, <option>, <p>, <question>, <question-preamble>, <sec>, <see>, <see-also>, <styled-content>, <td>, <th>
Description
The following, in order:
Content Model
<!ELEMENT  disp-formula-group
                        %disp-formula-group-model;                   >
Expanded Content Model

(label?, (caption)?, (alt-text | long-desc | email | ext-link | uri)*, (disp-formula | disp-formula-group)*)

Tagged Sample

Three equation group

...
<sec>
 <title>The Quadratic Formula</title>
 <p>...</p>
 <disp-formula-group>
  <disp-formula id="formula-qf-1">
   <label>(1)</label>
   <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
    <mml:mrow>...</mml:mrow>
   </mml:math>
  </disp-formula>

  <disp-formula id="formula-qf-2">
   <label>(2)</label>
   <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
    <mml:mrow>...</mml:mrow>
   </mml:math>
  </disp-formula>

  <disp-formula id="formula-qf-3">
   <label>(3)</label>
   <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
    <mml:mrow>...</mml:mrow>
   </mml:math>
  </disp-formula>
 </disp-formula-group>
</sec>
...
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