| (vertical bar - on the top left side of the keyboard) means or.  It allows you to search for more than one spelling at the same time. The sign is not used in the simple search.

  • Search for a first name Nils|Niels  will return all individuals called either Nils or Niels.
  • Search for a farm name Nes|Næs|Næss  will return all farms called either Nes, Næs or Næss.