If you want to add a link to the original context of the metadata file, e.g. to the repository where it is hosted (example), add a ResourceProxy of the type LandingPage, e.g.:
<ResourceProxy id="lp"> <ResourceType>LandingPage</ResourceType> <ResourceRef>http://hdl.handle.net/11858/00-097C-0000-0008-E130-A</ResourceRef> </ResourceProxy>