- - 3.2.3 MathML - Identifier mi

An mi element represents a symbolic name or arbitrary text that should be rendered as an identifier. Identifiers can include variables, function names, and symbolic constants.

### $\mathrm{xx}+x+\mathbf{x}+{y}+{z}+\colorbox[rgb]{1,0.533333333333333,0.266666666666667}{w}+\colorbox[rgb]{0,0,1}{x}$

#### MathML

```[itex]
<mi>xx</mi>
<mo>+</mo>
<mi>x</mi>
<mo>+</mo>
<mi mathvariant="bold">x</mi>
<mo>+</mo>
<mi mathcolor="#ff0000">y</mi>
<mo>+</mo>
<mi mathcolor="blue">z</mi>
<mo>+</mo>
<mi mathbackground="#ff8844">w</mi>
<mo>+</mo>
<mi mathbackground="blue">x</mi>
[/itex]
```