Is it me or the selectors being buggy?

[NielsKSchjoedt]

<vehicle lang="de-DE">
  <mainData>
  </mainData>
  <options>
    <option id="1">
      <value>5</value>
      <name>5 Türen</name>
      <description>Türen</description>
    </option>
    <option id="2">
      <value>5</value>
      <name>5 Sitze</name>
      <description>Sitze</description>
    </option>
  </options>
  <equipment/>
  <colors>
    <bodyColors>
      <bodyColor id="12">
        <name>silber</name>
        <description>Platin-Grau (D69)</description>
        <paint id="2">metallic</paint>
      </bodyColor>
    </bodyColors>
  </colors>
  <dates>
    <date id="2">2016-06-01</date>
    <date id="3">2019-04-01</date>
  </dates>
  <reservations/>
  <description>Dealer-of-the-Year-Sonderpreis</description>
  <package/>
</vehicle>

class Vehicle
  include SAXMachine
  element "description", as: :main_description, within: '.'
  element "description", as: :color, within: 'bodyColor'
end

class XmlParser
  include SAXMachine
  elements "vehicle", as: :vehicles, class: Vehicle
end

p = XmlParser.parse(xml)
p.vehicles.first
#=> #<Vehicle:0x007fc5213ec608 @main_description="Türen">

As you can see, neither the color nor the main_description is found correctly

[NielsKSchjoedt]

Hmm I see now, that the within: operator is not yet implemented. How would you go about solving this one then?