The main reason you want to do I"nlining images with SVG and data URIs" is to reduce http request.

If you doing "Inlining images with SVG and data URIs", the svg image are getting from memory.

1. Reduce svg image size:

http://petercollingridge.appspot.com/svg-optimiser

2. Inline svg image suppot (all browsers)

https://caniuse.com/#feat=svg-html5

3. Broswer support for Data URIs. (IE is partially support)

https://caniuse.com/#feat=datauri

inline svg and data URIs in html:

Convert a image to data uri: https://dopiaza.org/tools/datauri/index.php

<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg"
 
 xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
   width="396.74px" height="560px" viewBox="281.63 0 396.74 560" enable-background="new 281.63 0 396.74 560" xml:space="preserve"
  >
<g>
  <g>
    <g>
      <polygon fill="#E44D26" points="409.737,242.502 414.276,293.362 479.828,293.362 480,293.362 480,242.502 479.828,242.502
        "
 
/>
      <path fill="#E44D26" d="M281.63,110.053l36.106,404.968L479.757,560l162.47-45.042l36.144-404.905H281.63z M611.283,489.176
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      <polygon fill="#F16529" points="480,192.833 604.247,192.833 603.059,206.159 600.796,231.338 599.8,242.502 599.64,242.502
        480,242.502 480,293.362 581.896,293.362 595.28,293.362 594.068,306.699 582.396,437.458 581.649,445.85 480,474.021
        480,474.03 480,525.572 611.283,489.176 642.17,143.166 480,143.166       "/>
      <polygon fill="#F16529" points="540.988,343.029 480,343.029 480,422.35 535.224,407.445      "/>
      <polygon fill="#EBEBEB" points="414.276,293.362 409.737,242.502 479.828,242.502 479.828,242.38 479.828,223.682
        479.828,192.833 355.457,192.833 356.646,206.159 368.853,343.029 479.828,343.029 479.828,293.362       "/>
      <polygon fill="#EBEBEB" points="479.828,474.069 479.828,422.4 479.782,422.413 424.467,407.477 420.931,367.864
        394.052,367.864 371.072,367.864 378.031,445.85 479.771,474.094 480,474.03 480,474.021       "/>
      <polygon points="343.784,50.229 366.874,50.229 366.874,75.517 392.114,75.517 392.114,0 366.873,0 366.873,24.938
        343.783,24.938 343.783,0 318.544,0 318.544,75.517 343.784,75.517      "/>
      <polygon points="425.307,25.042 425.307,75.517 450.549,75.517 450.549,25.042 472.779,25.042 472.779,0 403.085,0
        403.085,25.042 425.306,25.042       "/>
      <polygon points="508.537,38.086 525.914,64.937 526.349,64.937 543.714,38.086 543.714,75.517 568.851,75.517 568.851,0
        542.522,0 526.349,26.534 510.159,0 483.84,0 483.84,75.517 508.537,75.517      "/>
      <polygon points="642.156,50.555 606.66,50.555 606.66,0 581.412,0 581.412,75.517 642.156,75.517      "/>
      <polygon fill="#FFFFFF" points="480,474.021 581.649,445.85 582.396,437.458 594.068,306.699 595.28,293.362 581.896,293.362
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        479.828,422.4 479.828,474.069       "/>
      <polygon fill="#FFFFFF" points="479.828,242.38 479.828,242.502 480,242.502 599.64,242.502 599.8,242.502 600.796,231.338
        603.059,206.159 604.247,192.833 480,192.833 479.828,192.833 479.828,223.682       "/>
    </g>
  </g>
</g>
</svg>

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Use in css:

http://udacity.github.io/responsive-images/examples/2-11/svgDataUriCss/

[HTML5] Inlining images with SVG and data URIs