From NSDLWiki

hasResourceHOST

The hasResourceHOST property identifies an agent that is an organization or other online presence.

Namespace 

http://ns.nsdl.org/api/relationships#

Prefix 

nsdl

Cardinality 

exactly one

Found in 

Agent

Values 

domain name or other network identifier (e.g. dlese.org)

Usage and Semantics

• Unique repository-wide