A channel is a means for uni- or bidirectional communication with an audience. Each channel is an interface which defines a set of operations. Together, these operations determine the capabilities of the channel.

Pseudo code:

interface SmsChannel
{
    void sendSms(Audience recipients, Content message);
}

Information available to campaigns for exchange over a channel is know as content. Content is available in different formats and languages. Examples of formats are text, audio, and video. Instances of data which renders content in a specific format and in a specific language are referred to as representations of that content.

Pseudo code:

class ContentRep
{
    // ...

    private ContentFormat format;
    private Language lang;
}

class Content
{
    // ...

    private ContentRep[] representations;
}

Media types

Content formats conform to the RFC 6838 Media Type (also know as MIME type) specification.

Pseudo code:

enum MediaType
{
    AudioMpeg,
    TextPlain,
    TextHtml,

    // ...
}

interface ContentFormat
{
    static pure MediaType mediaType();
}

class TextFormat : ContentFormat
{
    static pure MediaType mediaType() 
    { 
        return MediaType.TextPlain; 
    }
}

class Mp3Format : ContentFormat
{
    static pure MediaType mediaType() 
    { 
        return MediaType.AudioMpeg; 
    }
}

An adapter implements a channel interface against a specific backend, service or platform.

Pseudo code:

module nexmo_sms;

class NexmoSmsAdapter : SmsChannel
{
    void sendSms(Audience recipients, Content message)
    {
        // code that talks to Nexmo's API
    }
}

Interactive radio campaigns are schedulable and automated activities of audience interaction to exchange information (content).

An audience is a group of people who have been engaged to participate in a campaign. The audience interacts with the features of a campaign over a channel.

Alpha-2 codes are two-letter country codes defined in the ISO 3166 standard.