OOB will always be set under the oob property of any data objects.
Both namespaces are handled (jabber:iq:oob and jabber:x:oob) with jabber:iq:oob also having a parameter for sid (stream ID).
...
<query xmlns="jabber:iq:oob" sid="stream-id-1">
<url>http://www.evilprofessor.co.uk</url>
<desc>Link description</desc>
</query>
...
...
<x xmlns="jabber:x:oob">
<url>http://www.evilprofessor.co.uk</url>
<desc>Link description</desc>
</x>
...
Will be turned into the following:
{
url: "http://www.evilprofessor.co.uk"
description: "Link description",
stream: "stream-id-1"
}
With stream only being supported for jabber:iq:oob namespace. All parameters are optional (XEP-0066 states that only url is required).
Not currently built.