<?xml version="1.0" encoding="UTF-8"?>
<taskmodel name="Presenting a talk" role="Presenter">
    <task name="Give talk">
        <task name="Introduce talk" operator="enabling" precondition="Chair.oneInstance.IntroduceSession"/>
        <task name="Explain slide" operator="disabling" iterative="true">
            <task name="Activate slide" operator="enabling"/>
            <task name="Nip water" operator="enabling" optional="true"/>
            <task name="Explain slide"/>
        </task>
        <task name="End talk"/>
    </task>
</taskmodel>