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| nco:VideoTelephoneNumbernco:VideoTelephoneNumber | 
A Video telephone number. A class inspired by the TYPE=video parameter of the TEL property defined in RFC 2426 sec. 3.3.1
    http://www.w3.org/2000/01/rdf-schema#Resource 
        nco:ContactMedium 
        ╰── nco:PhoneNumber 
            ╰── nco:VoicePhoneNumber 
                ╰── nco:VideoTelephoneNumber