SVG is XML (which is text) 

<svg xmlns="http://www.w3.org/2000/svg"
     width="350" height="350" viewBox="0 0 350 350">
  <rect x="50" y="50" width="200" height="200" fill="black" />
  <circle cx="230" cy="200" r="100" fill="red" />
  <text x="185" y="190" font-size="60" text-anchor="middle"
        fill="white">Words!</text>
</svg>