Topics
Consider the types of topic you want to use and how.
A topic is a channel through which data can be distributed to clients. Topics provide a logical link between publishing clients and subscribing clients. For more information, see Pub-sub.
Diffusion™ topics are typed. Data sent through topics must match the data type of the topic.
Topics that store values
Advanced topics
                    
                    Diffusion
                
                    
                 Diffusion includes the following advanced topic type
        that provides the ability to store a series of events. The event type corresponds to one of
        the above topic types. 
        Properties
You can also assign properties to topics when you create them. The properties a topic can have can change depending on the topic type. For more information, see Properties of topics.