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
| Constant | Value |
|---|---|
veryverythinmathspace |
1/18em |
verythinmathspace |
2/18em |
thinmathspace |
3/18em |
mediummathspace |
4/18em |
thickmathspace |
5/18em |
verythickmathspace |
6/18em |
veryverythickmathspace |
7/18em |
| Negative contstants 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 |
Note: Namedspace binding is deprecated in MathML3 and has been removed in Gecko 15.0 (Firefox 15.0 / Thunderbird 15.0 / SeaMonkey 2.12) (bug 673759).