Svg example

face.svg

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->
<svg xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" height="1052.4" width="744.09" version="1.1" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
 <metadata>
  <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/>
   </cc:Work>
  </rdf:RDF>
 </metadata>
 <g stroke-width="24.4">
   <path d="m265.71 86.648a177.14 177.14 0 1 1 -354.29 0 177.14 177.14 0 1 1 354.29 0z" fill-rule="evenodd" transform="matrix(1.6866 0 0 1.6866 223.47 216.22)" stroke="#000" fill="#fcff00"/>
   <g id="fff">
     <g transform="translate(24.286)" data="mailo">
       <path d="m157.14 150.93a70 70 0 1 1 -140 0 70 70 0 1 1 140 0z" transform="translate(148.57 118.57)"/>
       <path d="m157.14 150.93a70 70 0 1 1 -140 0 70 70 0 1 1 140 0z" transform="translate(374.29 118.57)"/>
    </g>
   </g>
 </g>
</svg>

get path element.rb

require 'nokogiri'

noko_doc = Nokogiri::XML ( <svg content> )
noko_doc.xpath('//path')