optional, single

id=unique identifier of dive instructor — compulsory

Inside <instructor> information about the dive instructor is given, who issued the level.

<certification>

<address>, <contact>, <notes>, <personal>

<certification>

(see also <certification>)

<certification>
    <!-- here information about the diving level, and the organization -->
    <instructor id="di2_ijk>
        <!-- description of dive instructor -->
        <personal>
            <firstname>Ingo</firstname>
            <middlename>Jürgen</middlename>
            <lastname>Knattermann</lastname>
            <sex>male</sex>
            <birthdate>
                <!-- date of birthdate not known -> statements omitted -->
            </birthdate>
            <address>
                <!-- address not known -> statements omitted -->
            </address>
        </personal>
        <contact>
            <language>deutsch</language>
            <!-- phone number unknown -> <phone> element omitted -->
            <email>ijk@knattermanns_tauchschule.de</email>
            <homepage>http://www.knattermanns_tauchschule.de</homepage>
        </contact>
        <notes>
            <!-- here more text-information, pictures etc. -->
        </notes>
    </instructor>
    <!-- here follow statements about the issue date -->
</certification>