The designated font is Work Sans available from Google Fonts under an Open Font License.
The two typeface weights used are:
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Work Sans Light
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Work Sans Semibold
Figure 1. UnitsML logotype
What is empty provides utility.
— Lao Tze
The graphical logo incorporates the letters U, M and L in the same rectangular shape, with the "U" visible in the negative space.
Units serve a crucial purpose but are often overlooked in measurements. Echoing the said quote, units benefit the world best by remaining hidden.
The logo is designed by Jen Scarisbrick.
Figure 2. UnitsML logo shape
