Read the article, someone already read the RFC for you. To your questions: Yes. Almost, urn:isbn:123-4567-89 (URNs are something I neglected to mention to keep

Read the article, someone already read the RFC for you. To your questions: Yes. Almost, urn:isbn:123-4567-89 (URNs are something I neglected to mention to keep things simple). Yes, the IANA maintains a registry.