Cómo centrar el texto en SVG
<text x="50%" y="50%" text-anchor="middle" dominant-baseline="middle">Text</text>
sio
<text x="50%" y="50%" text-anchor="middle" dominant-baseline="middle">Text</text><svg width="200" height="100">
<rect x="0" y="0" width="200" height="100" stroke="red" stroke-width="3px" fill="white"/>
<text x="50%" y="50%" dominant-baseline="middle" text-anchor="middle">TEXT</text>
</svg>