importsClosureCache = new HashMap<OWLOntologyID, Set<OWLOntology>>();
missingImportsListeners = new ArrayList<MissingImportListener>();
loaderListeners = new ArrayList<OWLOntologyLoaderListener>();
progressListeners = new ArrayList<OWLOntologyChangeProgressListener>();
autoGeneratedURICounter = 0;
defaultChangeBroadcastStrategy = new DefaultChangeBroadcastStrategy();
defaultImpendingChangeBroadcastStrategy = new DefaultImpendingChangeBroadcastStrategy();
}