Hypermedia URIs should be relative URIs

[sandervd]

When outputting hypermedia URIs that will be dereferenced by the client, as an LDES server, it would be best (rfc 2119 SHOULD?) to make those relative URIs.

This will allow for transparent proxy mappings without the need for proxy to rewrite any content. As relative URIs are interpreted relative to the URL of the document they occur on, this will effectively resolve any potential proxy issues.