What is the graph of Nodes and Links used for?
This system of Nodes and Links is integral to managing where, how, and when content can be used in a Marlin system. When a License is created, the control program within it will typically include a requirement that a certain Node, such as a User Node (e.g., one representing “Bob Smith”) be reachable by the device attempting to access the content. Being reachable means that the Marlin Client running on the device in question contains a valid set of Links from the Personality Node representing the device to the specified Node. This can be a direct Link from the Personality Node to the specified Node (such as from Device A to user “Bob Smith” in the figure above) or a series of Links (such as from Device B to “Bob Smith” to “Video”). This process of indicating in the License’s control program that a particular Node must be reachable is referred to as targeting to that Node.
