<equation-block>
When an <equation-block> element has multiple direct child elements, each child represents an alternative form of the equation. Processors are free to choose the form or forms that they use in deliverables. For example, if there is both an image and MathML markup, an HTML-generating processor could output both the image reference and the MathML with appropriate HTML @class or @id values to enable dynamic showing or hiding of one form or the other based on browser capability.
Content models
See appendix for information about this element in OASIS document type shells.
Inheritance
+ topic/p equation-d/equation-block
Example
In the following example, a block equation uses MathML as its content:
<p>A block equation using MathML:</p>
<equation-block>
<mathml>
<m:math>
<m:semantics>
<m:mrow>
<m:msqrt>
<m:mrow>
<m:msup>
<m:mi>a</m:mi>
<m:mn>2</m:mn>
</m:msup>
<m:mo>+</m:mo><m:msup>
<m:mi>b</m:mi>
<m:mn>2</m:mn>
</m:msup>
</m:mrow>
</m:msqrt>
</m:mrow>
</m:semantics>
</m:math>
</mathml>
</equation-block>
In the following example, a block equation uses an image as its content:
<p>A block equation using an image:</p>
<equation-block>
<image keyref="equation-image-01">
<alt>a squared plus b squared.</alt>
</image>
</equation-block>
In the following example, the block equation contains two alternative forms of the same equation:
<equation-block>
<image keyref="equation-image-01">
<alt>a squared plus b squared.</alt>
</image>
<mathml>
<m:math>
<m:semantics>
<m:mrow>
<m:msqrt>
<m:mrow>
<m:msup>
<m:mi>a</m:mi>
<m:mn>2</m:mn>
</m:msup>
<m:mo>+</m:mo><m:msup>
<m:mi>b</m:mi>
<m:mn>2</m:mn>
</m:msup>
</m:mrow>
</m:msqrt>
</m:mrow>
</m:semantics>
</m:math>
</mathml>
</equation-block>
Attributes
The following attributes are available on this element: Universal attribute group and @outputclass.