What 'patterns' are being searched for when national ID number?

When scanning a national ID number during meeting creation, various 'patterns' are scanned for – combinations of digits, spaces, and hyphens that resemble CPR numbers.
 

Below are the patterns being scanned for:
 

  • Hyphen (e.g., 010290-1210)
     
  • Without hyphen (e.g., 0102901210)
     
  • Hyphen + space (e.g., 010290- 1210)
     
  • Space + hyphen (e.g., 010290 -1210)
     
  • Space + hyphen + space (e.g., 010290 - 1210)
     
  • Space (e.g., 010290 1210)