# Including equations in DITA content

**equation-inline**,

**equation-block**, and

**equation-figure**. Choose the DITA elements that makes the most sense for your equations: inline, in a separate block, and/or an equation or series of equation with a caption.

## For a single equation:

Use **equation-inline** and **equation-block** elements to represent a single equation.

For inline equations use **equation-inline**. Inline equations allow a smooth flow of the sentence that contains the inline equation. Typically, inline equations are not numbered. (For inline equations, numbering could create ambiguity if the number was or was not part of the equation itself.)

To present an equation outside of the sentence flow, use, **equation-block. **Block equations may be numbered (numbering is optional). [Inline equations are not numbered largely because it could be visually ambiguous as to whether a and it would also disrupt the flow of the sentence that contains the inline equation.]

## For multiple equations, or for equations with a caption:

Use the **equation-figure** element to represents a “display” equation that contains one more distinct equations. The **equation-figure** element may be numbered and may have a caption. The **equation-figure** element is a specialization of <fig>. With an **equation-figure** element, individual equations can have their own numbering.