<http://rdf-vocabulary.ddialliance.org/lifecycle#citation>	<http://www.w3.org/2007/05/powder-s#describedby>	<https://demo.openlinksw.com/about/id/entity/https/docs.ddialliance.org/DDI-Lifecycle/dev/output/ddi4.owl.ttl> .
<http://rdf-vocabulary.ddialliance.org/lifecycle#citation>	<http://www.w3.org/2000/01/rdf-schema#label>	"citation" .
<http://rdf-vocabulary.ddialliance.org/lifecycle#citation>	<http://www.w3.org/2004/02/skos/core#inScheme>	<http://rdf-vocabulary.ddialliance.org/lifecycle#> .
<http://rdf-vocabulary.ddialliance.org/lifecycle#citation>	<http://www.w3.org/2000/01/rdf-schema#range>	<http://rdf-vocabulary.ddialliance.org/lifecycle#CitationType> .
<http://rdf-vocabulary.ddialliance.org/lifecycle#citation>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#ObjectProperty> .
<http://rdf-vocabulary.ddialliance.org/lifecycle#citation>	<http://www.w3.org/2000/01/rdf-schema#comment>	"Citation for the Instance. Note that the citation is optional, because the DDI Instance may contain only reusable component pieces of metadata sets, which are not directly concerned with a single study or studies." .