Inside the <divetrip> section all data concerning dive trips are given.
The <divetrip> section stands after the <divesite> section and before the <gasdefinitions> section.
The only element inside <divetrip> is <trip> which can be repeated any times.
<uddf>
<trip>
<divesite>, <gasdefinitions>, <uddf>
<divetrip>
    <trip id="trip_1">
        <!-- information concerning the first stored dive trip -->
        <name>Red Sea 2000</name>
        ...
    </trip>
    <trip id="trip_2">
        <!-- information concerning the second stored dive trip -->
        <name>Red Sea 2001</name>
        ...
    </trip>
    <trip id="trip_3">
        <!-- information concerning the third stored dive trip -->
        <name>Island of Elba 2002</name>
        ...
    </trip>
    <!-- here more <trips> can follow -->
</divetrip>