xhtml2:up
http://www.w3.org/2002/06/xhtml2/#up
rdfs:comment
http://www.w3.org/2000/01/rdf-schema#comment
Refers to the document "above" in a hierarchically structured set of documents.
@en
graph:default
https://triplydb.com/w3c/xhtml-link-types/graphs/default