Why is svg font upside down?

Question

Fonts

Given: SVG file with element:

<path d="..." />

Converted the file to SVG font format:

<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg">
    <defs>
        <font id="somefont" horiz-adv-x="1000">
            <font-face font-family="somefont" units-per-em="1000"/>
            <glyph unicode="a" d="..."/>
        </font>
    </defs>
</svg>

The attribute dhas not changed, but the font is mirrored with respect to the x.
Why is this happening and how to fix it?

Answer 1

Unlike standard graphics in SVG, where the initial coordinate system has the y-axis pointing downward (see The initial coordinate system), the design grid for SVG fonts, along with the initial coordinate system for the glyphs, has the y-axis pointing upward for consistency with accepted industry practice for many popular font formats.

www.w3.org/TR/SVG/fonts.html