The NEPOMUK Calendaring Ontology intends to provide vocabulary for describing calendaring data (events, tasks, journal entries) which is an important part of the body of information usually stored on a desktop. It is an adaptation of the ICALTZD ontology created by the W3C RDF Calendar Task Force of the Semantic Web Interest Group in the Semantic Web Activity. @en
(2013-05-22) Bernard Vatant: The documentation page makes an exhaustive analysis and criticism of W3C calendar ontologies ical and icaltzd. This vocabulary is presented as a serious alternative, but does not seem to have been much adopted outside the NEPOMUK project.