Description

A number that can accept textual messages.

Class hierarchy

    http://www.w3.org/2000/01/rdf-schema#Resource 
        nco:ContactMedium 
        ╰── nco:PhoneNumber 
            ╰── nco:MessagingNumber 
                ├── nco:PagerNumber 
                ╰── nco:CellPhoneNumber