input_additional.add.xml

<?xml version="1.0" encoding="UTF-8"?>

<additional xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://sumo.dlr.de/xsd/additional_file.xsd">
    <railSignalConstraints id="A">
        <predecessor tripId="t0" tl="D" foes="t1" limit="3">
            <param key="foo" value="42"/>
            <param key="bar" value="23"/>
        </predecessor>
        <predecessor tripId="t0" tl="D" foes="t2" limit="3"/>
        <predecessor tripId="t0" tl="D" foes="t3" limit="3"/>
        <predecessor tripId="t4" tl="D" foes="t5" limit="1"/>
    </railSignalConstraints>
</additional>