<constraints>

  <hardware>

    <physicalmemory>

      <size unit="M">4096</size>

    </physicalmemory>

    <disk>

      <size unit="G">20</size>

    </disk>

  </hardware>

​

  <overwrite>

    <conditions>

      <arch>armv7l</arch>

      <arch>armv6l</arch>

    </conditions>

    <hardware>

      <physicalmemory>

        <size unit="M">512</size>

      </physicalmemory>

    </hardware>

  </overwrite>

​

</constraints> 

​