@Deprecated
public interface ContentRelations
The content relations is used to specify the usage and relation information of the content to be handled. It is most likely used within content action listeners to determine
their action according to the relations of the content. Let's assume the content of a document is stored and hence the thumbnails of the document should be created within an
action listener so it is important to get the meta data of the content as well as it's source object to actually store the thumbnails for instance. The content usage is
basically an interface and is just used to pass along to the content action listener.