Boxy SVG.xml

<?xml version="1.0" encoding="utf-8"?>
<svg viewBox="0 0 500 500" xmlns="http://www.w3.org/2000/svg">
  <rect x="142.476" y="149.468" width="168.714" height="151.346" style="fill: rgb(216, 216, 216);"/>
</svg>

Inkscape (Full SVG).xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:cc="http://creativecommons.org/ns#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
   width="210mm"
   height="297mm"
   viewBox="0 0 210 297"
   version="1.1"
   id="svg8"
   inkscape:version="1.0.1 (3bc2e813f5, 2020-09-07)"
   sodipodi:docname="Full.svg">
  <defs
     id="defs2" />
  <sodipodi:namedview
     id="base"
     pagecolor="#ffffff"
     bordercolor="#666666"
     borderopacity="1.0"
     inkscape:pageopacity="0.0"
     inkscape:pageshadow="2"
     inkscape:zoom="0.35"
     inkscape:cx="400"
     inkscape:cy="557.14286"
     inkscape:document-units="mm"
     inkscape:current-layer="layer1"
     inkscape:document-rotation="0"
     showgrid="false"
     inkscape:window-width="1394"
     inkscape:window-height="792"
     inkscape:window-x="0"
     inkscape:window-y="31"
     inkscape:window-maximized="0" />
  <metadata
     id="metadata5">
    <rdf:RDF>
      <cc:Work
         rdf:about="">
        <dc:format>image/svg+xml</dc:format>
        <dc:type
           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
        <dc:title></dc:title>
      </cc:Work>
    </rdf:RDF>
  </metadata>
  <g
     inkscape:label="Layer 1"
     inkscape:groupmode="layer"
     id="layer1">
    <rect
       style="fill:#e69d46;stroke:#9a4f09;stroke-width:2.989"
       id="rect833"
       width="126.99534"
       height="108.09932"
       x="40.43644"
       y="75.206947" />
  </g>
</svg>

Inkscape (Plain SVG).xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:cc="http://creativecommons.org/ns#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   width="210mm"
   height="297mm"
   viewBox="0 0 210 297"
   version="1.1"
   id="svg8">
  <defs
     id="defs2" />
  <metadata
     id="metadata5">
    <rdf:RDF>
      <cc:Work
         rdf:about="">
        <dc:format>image/svg+xml</dc:format>
        <dc:type
           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
        <dc:title></dc:title>
      </cc:Work>
    </rdf:RDF>
  </metadata>
  <g
     id="layer1">
    <rect
       style="fill:#e69d46;stroke:#9a4f09;stroke-width:2.989"
       id="rect833"
       width="126.99534"
       height="108.09932"
       x="40.43644"
       y="75.206947" />
  </g>
</svg>