urn:issn:.urnr.yml

$schema: urn:resolver:schema:urnr
"@id": urn:issn
meta:
  spec: https://en.wikipedia.org/wiki/International_Standard_Serial_Number#Use_in_URNs
  examples:
    - in.urn: urn:issn:1476-4687
      out.[0].iri: https://urn.issn.org/urn:issn:1476-4687
    - in.urn: urn:ISSN:1476-4687
      out.[0].iri: https://urn.issn.org/urn:issn:1476-4687
rules:
  - in:
      urn: "urn:issn:(.*)"
    out:
      iri: "https://urn.issn.org/urn:issn:{{ in[1] }}"