Front page description is "Logical URI to reference this value set (globally unique)"

This does not suggest an implemented service. To me.

When you click through, you get "An absolute URI that is used to identify this value set when it is referenced in a specification, model, design or an instance. This SHALL be a URL, SHOULD be globally unique, and SHOULD be an address at which this value set is (or will be) published."

This does suggest an implemented service.

Suggest replacing the short one with the long one, or with something like "URL for retrieving the value set definition or expansion." .