LCC13 — The primary URI for a country should be based on its ISO code

with the name-based URI as an alternative using sameAs.
The name-based URIs are unstable (we have had several countries changing name but not ISO code) and the algorithm (e.g. for replacing spaces and punctuation) makes them unpredictable. Most external datasets use the code not the name, requiring an expensive lookup to create a link using the name-based URI.