<fontconfig>

  <group>

    <target>PT Sans</target>

    <axis>

      <name>optical size</name>

      <step>

        <name>Regular</name>

        <match>

          <family>PT Sans Narrow</family>

          <prepend-keyword>Condensed</prepend-keyword>

        </match>

      </step>

      <step>

        <name>Caption</name>

        <value>8</value>

      </step>

    </axis>

    <like>

      <family>Myriad Pro</family>

      <family>sans-serif</family>

    </like>

  </group>

</fontconfig>