{
  "id": "cts_urn",
  "name": "CTS URN (Canonical Text Services)",
  "status": "draft",
  "doc": "URN that cites a passage of a text by its canonical reference, used for classical Greek and Latin texts in the Perseus Digital Library, the Homer Multitext and other CITE/CTS projects. It has the form urn:cts:<namespace>:<work>:<passage>. The work part has up to four dot-separated levels: text group, work, version (edition or translation) and exemplar. The passage is a citation such as book.line, a range joined by a hyphen, or a node with a subreference such as @Atreus[1]. The specification requires the colon before an empty passage, but catalogues often omit it, so the regexp accepts both.",
  "parent": {
    "type": "urn"
  },
  "categories": [
    {
      "id": "texts",
      "name": "Texts and  articles"
    }
  ],
  "langs": [
    {
      "id": "common",
      "name": "Common to most languages"
    }
  ],
  "is_pii": false,
  "classification": "identifier",
  "regexp": "^urn:cts:[A-Za-z0-9_-]+:[A-Za-z0-9_-]+(?:\\.[A-Za-z0-9_-]+){0,3}(?::[^\\s:%/?#]*)?$",
  "examples": [
    {
      "value": "urn:cts:greekLit:tlg0012.tlg001.hmt01:10.1-10.10",
      "description": "Iliad, book 10, lines 1 to 10 (example of the specification)"
    },
    {
      "value": "urn:cts:greekLit:tlg0012.tlg001.hmt01:10.4@Atreus[1]",
      "description": "First occurrence of a word in a line (example of the specification)"
    },
    {
      "value": "urn:cts:greekLit",
      "valid": false,
      "description": "Namespace without a work"
    }
  ],
  "links": [
    {
      "type": "doc",
      "url": "https://cite-architecture.github.io/ctsurn_spec/"
    }
  ],
  "translations": {
    "ru": {
      "name": "CTS URN (Canonical Text Services)",
      "doc": "URN для ссылки на место канонического текста, прежде всего античного, по схеме urn:cts:<пространство>:<произведение>:<место>."
    }
  },
  "type": "datatype"
}