Event Model

dotNetRDF makes limited use of events itself but various classes generated useful events that you can attach handlers to as desired, this document gives a quick overview of the various events available.

Warning Events

The parsers and serializers for RDF all support Warning or StoreWarning events which are used to notify of non-fatal issues with RDF being read/written. This simply output a String which contains a message describing the issue with the RDF and what action the parser has taken (if appropriate).

Data Model Events

dotNetRDF raises a variety of events which bubble up internally through multiple layers:

Triple Store Events

Event	Occurrence
ITripleStore.GraphAdded	Occurs when a Graph is added to a Store
ITripleStore.GraphRemoved	Occurs when a Graph is removed from a Store
ITripleStore.GraphChanged	Occurs when a Graph is changed. This event is a bubbled event triggered by the IGraph.Changed event
ITripleStore.GraphCleared	Occurs when a Graph is cleared. This event is a bubbled event triggered by the IGraph.Cleared event
ITripleStore.GraphMerged	Occurs when a Graph has a merge operation performed on it

Graph Events

Event	Occurrence
IGraph.TripleAsserted	Occurs when a Graph has a Triple asserted in it. This event is a bubbled event triggered by the BaseTripleCollection.TripleAdded event
IGraph.TripleRetracted	Occurs when a Graph has a Triple retracted from it. This event is a bubbled event triggered by the BaseTripleCollection.TripleRemoved event
IGraph.Changed	Occurs when a Graph changes
IGraph.ClearRequested	Occurs when a Clear() operation is requested on a Graph
IGraph.Cleared	Occurs when a Graph is cleared
IGraph.MergeRequested	Occurs when a Merge() operation is requested on a Graph
IGraph.Merged	Occurs when a Graph is merged

Triple Collection Events

Event	Occurrence
BaseTripleCollection.TripleAdded	Occurs when a Triple is added to the collection
BaseTripleCollection.TripleRemoved	Occurs when a Triple is removed from the collection