Zvon SVG reference - attribute writing-mode

ZVON > References > SVG 1.1 Reference

Attribute:	writing-mode
Parents:	\| svg \| g \| defs \| symbol \| use \| switch \| marker \| pattern \| mask \| filter \| feImage \| a \| font \| glyph \| missing-glyph \| foreignObject \|
Value:	lr-tb \| rl-tb \| tb-rl \| lr \| rl \| tb \| inherit