]> Communication participant description ontology. 1.0 Contains concepts allowing to describe communication participant in details, e.g. identification address type or participant state can be added. Defines address type which allow to identify communication participant. Defines communication initiatives to which communication participant has rights. Defines profile which express user rights during service. Defines state of communication participant. Defines that user is logged in and can take part in communication. Defines that user is logged in at his terminal but will not take part in communication. Defines that user is logged in at his terminal but temporarily is unattainable and can not take part in two way communication. Defines the international public telecommunication numbering plan used in the PSTN and some other data networks. Defines e-mail address type. Defines MSISDN (Mobile Subscriber ISDN Number) address type which refers to the telephone number of a mobile subscriber. Defines participant address type. Defines profile of the communication participant. Can be used to specify rights to communication initiative. Defines status of the user in service, it could also be used express that participant is logged in to his terminal and has access to the network. Defines SIP identification address type. Defines that user is not logged in at his terminal and cannot take part in communication.