Here is my problem: from the following XML that is within a column, I want to know if the value of a variable with the name 'Enabled' is equal to 'Yes' given a step Id and a component Id.

'<xml>
  <box stepId="1">
    <components>
      <component id="2">
        <variables>
          <variable id="3" nom="Server" valeur="DEV1" />
          <variable id="4" nom="Enabled" valeur="Yes" />
        </variables>
      </component>
      <component id="3">
        <variables>
          <variable id="3" nom="Server" valeur="DEV1" />
          <variable id="4" nom="Enabled" valeur="No" />
        </variables>
      </component>
    </components>
  </box>
  <box stepId="2">
    <components>
      <component id="2">
        <variables>
          <variable id="3" nom="Server" valeur="DEV2" />
          <variable id="4" nom="Enabled" valeur="Yes" />
        </variables>
      </component>
      <component id="3">
        <variables>
          <variable id="3" nom="Server" valeur="DEV2" />
          <variable id="4" nom="Enabled" valeur="No" />
        </variables>
      </component>
    </components>
  </box>
</xml>'
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