RygelWritableContainer — This interface should be implemented by 'writable' containers - ones that allow adding, removal and editing of items directly under them. Currently, only addition and removal is supported.
RygelRelationalExpression — This is a parsed UPnP search expression consisting of two strings joined by a relational operator such as such <, <=, ==, !=, >, >=, derivedFrom or exists.
RygelMediaServer — This class may be used to implement in-process UPnP-AV media servers.
RygelVisualItem — An interface that visual (video and image) items must implement.
RygelLogicalExpression — This is a parsed UPnP search expression consisting of two other search expressions joined by a boolean operator such as AND or OR.
RygelMediaServerPlugin — This is the base class for every Rygel implementation of a UPnP media server. It should be used either for a real plug-in for the rygel process or used in-process via the librygel-server API (see the standalone-server.c example).