<Footnote id="7c66cd52-4ace-4fd6-a05d-fd0255e441bb"> The Dublin Core elements are optional, but some renderers may require them in order to produce sensible output. The title of a <Link target="a49dac27-48f0-4504-8e03-8f0b73cd9c46">Document</Link> is specified using the <LinkExternal target="https://www.dublincore.org/specifications/dublin-core/dcmi-terms/#http://purl.org/dc/terms/title">dc:title</LinkExternal> element, for example. </Footnote>