optional, multiple

id=unique identifier for this tank used

Inside <tank> follows information about a tank used.

<equipment>

<manufacturer>, <model>, <name>, <nextservicedate>, <notes>, <purchase>, <serialnumber>, <serviceinterval>

<equipment>

(see also <equipment>)

<equipment>
    <tank id="my_tank">
        <name>Albert's tank</name>
        <manufacturer>
            <name>Steeltankmaker</name>
        </manufacturer>
        <model>15 litres</model>
        <serialnumber>12345</serialnumber>
        <purchase>
            <date>
                <year>1986</year><month>8</month><day>19</day><dayofweek>2</dayofweek>
            </date>
            <price currency="DM">200.00</price>
            <shop>
                <name>Dive Deep Down</name>
                <address>
                    <!-- address of shop -->
                </address>
                <contact>
                    <!-- phone number, email address etc. -->
                </contact>
                <notes>
                    <!-- additional remarks -->
                </notes>
            </shop>
        </purchase>
        <!-- every two years to be serviced -->
        <serviceinterval>730</serviceinterval>
        <nextservicedate>
            <year>2006</year><month>8</month>
        </nextservicedate>
    </tank>
</equipment>