<mi>

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The MathML <mi> element indicates that the content should be rendered as an identifier such as function names, variables or symbolic constants. You can also have arbitrary text in it to mark up terms.

Attributes

class, id, style
Provided for use with stylesheets.
dir
The text direction. Possible values are either ltr (left to right) or rtl (right to left).
href
Used to set a hyperlink to a specified URI.
mathbackground
The background color. You can use #rgb, #rrggbb and HTML color names.
mathcolor
The text color. You can use #rgb, #rrggbb and HTML color names.
mathsize
The size of the content. Possible values are:
  • small: Font is rendered smaller than the current font size.
  • normal: Equivalent to 100% or 1em.
  • big: Font is rendered larger than the current font size.
  • a custom length.
  • or a unitless value which multiplies the default.
mathvariant
This logical class of the identifier, which varies in typography. That is, although the names suggest the typographic style for the class, semantically, items with the same class are treated "the same" within an expression, which might or might not involve displaying them with the named typography. The following values are allowed:
  • normal (Default value for more than one character) ; Example
  • bold ; Example
  • italic (Default value for a single character) ; Example
  • bold-italic ; Example
  • double-struck ; Example
  • bold-fraktur ; Example
  • script ; Example
  • bold-script ; Example
  • fraktur ; Example
  • sans-serif ; Example
  • bold-sans-serif ; Example
  • sans-serif-italic ; Example
  • sans-serif-bold-italic ; Example
  • monospace ; Example
  • initial ; مثال
  • tailed ; مثال
  • looped ; مثال
  • stretched ; مثال

Examples

<math> 

  <mi> y </mi>  

  <mi> sin </mi>

  <mi mathvariant="monospace"> x </mi>

  <mi mathvariant="bold"> &pi; </mi>

</math>

Specifications

Specification Status Comment
MathML 3.0
The definition of 'mi' in that specification.
Recommendation Current specification
MathML 2.0
The definition of 'mi' in that specification.
Recommendation Initial specification

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support Not supported 1.0 (1.7 or earlier) Not supported Not supported 5.1
dir attribute Not supported 12.0 (12.0) Not supported Not supported Not supported
href attribute Not supported 7.0 (7.0) Not supported Not supported Not supported
mathsize attribute Not supported 1.0 (1.7 or earlier) Not supported Not supported 5.1
mathvariant attribute Not supported 28.0 (28.0) Not supported Not supported 5.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support Not supported Not supported 1.0 (1.9.2) Not supported Not supported Not supported
dir attribute Not supported Not supported 12.0 (12.0) Not supported Not supported Not supported
href attribute Not supported Not supported 7.0 (7.0) Not supported Not supported Not supported
mathsize attribute Not supported Not supported 1.0 (1.9.2) Not supported Not supported Not supported
mathvariant attribute Not supported Not supported 28.0 (28.0) Not supported Not supported Not supported

Gecko-specific notes

  • Starting with Gecko 20.0 (Firefox 20.0 / Thunderbird 20.0 / SeaMonkey 2.17) a unitless value for mathsize is allowed.
  • Some mathvariant values are only implemented starting with Gecko 28.0 (Firefox 28.0 / Thunderbird 28.0 / SeaMonkey 2.25) and require appropriate math fonts.

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