Lengths
Several MathML presentation elements have attributes that accept length values used for size or spacing. MathML accepts different units and constants for specifying lengths.
Units
| Unit | Description |
em | Font-relative
unit |
ex | Font-relative
unit. (The "x"-height of the element, 1ex ≈ 0.5em in many fonts) |
px | Pixels |
in | Inches (1 inch = 2.54 centimeters) |
cm | Centimeters |
mm | Millimeters |
pt | Points (1 point = 1/72 inch) |
pc | Picas (1 pica = 12 points) |
% | Percentage of the default value. |
Constants (namedspaces)
| Constant | Value |
veryverythinmathspace | 1/18em |
verythinmathspace | 2/18em |
thinmathspace | 3/18em |
mediummathspace | 4/18em |
thickmathspace | 5/18em |
verythickmathspace | 6/18em |
veryverythickmathspace | 7/18em |
| Negative namedspaces are introduced in Gecko 7.0 (Firefox 7.0 / Thunderbird 7.0 / SeaMonkey 2.4)
(
bug 650530
) |
negativeveryverythinmathspace | -1/18em |
negativeverythinmathspace | -2/18em |
negativethinmathspace | -3/18em |
negativemediummathspace | -4/18em |
negativethickmathspace | -5/18em |
negativeverythickmathspace | -6/18em |
negativeveryverythickmathspace | -7/18em |
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