test/plugins/cleanupIDs.16.svg

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 230 120">
    <defs>
        <circle id="a" fill="red" cx="60" cy="60" r="50"/>
        <rect id="rect" fill="blue" x="120" y="10" width="100" height="100"/>
    </defs>
    <use xlink:href="#a"/>
    <use href="#rect"/>
</svg>

@@@

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 230 120">
    <defs>
        <circle id="a" fill="red" cx="60" cy="60" r="50"/>
        <rect id="b" fill="blue" x="120" y="10" width="100" height="100"/>
    </defs>
    <use xlink:href="#a"/>
    <use href="#b"/>
</svg>

@@@

{"preserve": "a"}