Mass tagging expert

For people that know how mass tagging with mp3tag works:

• Tagging page: https://tango.info/tools/tagger1.3.3.php ( https://tango.info/tools/tagger1.0.php no longer works)
• mp3tag format strings
  • import (use in Convert > Text file - Tag)
    • import all
    • import only tango.info date to Mp3tag year
  • convert (use in Convert > Action >> Format Value)
    • convert tango.info date spec. to single date
      • Extracts YYYY[-MM[-DD]] from:
        • YYYY
        • YYYY-MM
        • YYYY-MM-DD
        • YYYY-MM-DD--DD
        • YYYY-MM-DD--MM-DD
      • Blanks anything else, inc
        • YYYY--YYYY
        • YYYY|YYYY
        • YYYY|YYYY|YYYY
    • convert tango.info date spec. to single year (use in a Format Value action)
      • Extracts YYYY from:
        • YYYY
        • YYYY-MM-DD
        • YYYY-MM-DD--DD
      • Blanks anything else, inc
        • YYYY--YYYY
        • YYYY|YYYY
        • YYYY|YYYY|YYYY