org.apache.abdera.ext.thread.ThreadExtensionFactory
org.apache.abdera.ext.features.FeaturesExtensionFactory
org.apache.abdera.ext.tombstones.TombstonesExtensionFactory
org.apache.abdera.ext.media.MediaExtensionFactory
org.apache.abdera.ext.opensearch.OpenSearchExtensionFactory
org.apache.abdera.ext.sharing.SharingExtensionFactory
org.apache.abdera.protocol.error.ErrorExtensionFactory