2.1.8 [SVG1.1:2011] Section 10.11, Spacing properties
V0039:
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‘kerning' Value: auto | <length> | inherit Initial: auto Applies to: text content elements Inherited: yes Percentages: N/A Media: visual Animatable: yes
IE9 Mode, IE10 Mode, IE11 Mode, and EdgeHTML Mode (All Versions)
The kerning attribute is not supported.