>
    <rect x="75" y="0" width="10" height="25">
        <title>xMidYMin meet</title>
    </rect>
    <svg viewBox="0 0 100 100" width="10" height="25"
         preserveAspectRatio="xMidYMin meet" x="75" y="0">
        <use href="#smiley" />
    </svg>

    <rect x="90" y="0" width="10" height="25">
        <title>xMidYMid meet</title>
    </rect>
    <svg viewBox="0 0 100 100" width="10" height="25"
         preserveAspectRatio="xMidYMid meet" x="90" y="0">
        <use href="#smiley" />
    </svg>

    <r