Is there a way to define DNS for IPv6 addresses?

Something like:

<dns forwardPlainNames="yes">

<host ip="192.168.200.4">
<hostname>lago_basic_suite_3_6_storage-iscsi</hostname>
</host>
</dns>

Only for IPv6?

I reckon I can't just use an IPv6 address in the 'IP' attribute?

TIA,

Y.