Principles of selection of keywords

  1. Subject of the study: eg. archeology, history, anthropology
  2. Description of the object of study: eg. settlement, burial, spearheads
  3. Determining the chronology: eg. Stone Age, early Middle Ages, 16 century, 1945-1950 (century Arabic numerals)
  4. The geographical description: eg. Pomerania, Szczecin, lower Nadodrze
  5. Number of keywords: minimum 4 - maximum 6
  6. Keywords should be recorded in lowercase, unless it is a name