Archivist can record the taxons and their relationships as things and strings.
The relationships can be updated as new discoveries are made.
Modern humans are (currently) classed as: Homo sapiens sapiens,
from the Species: Homo sapiens,
from the Genus: Homo,
from the Tribe: Hominini,
from the Family: Hominidae,
from the Suborder: Haplorhini,
from the Order: Primates,
from the Class: Mammalia,
from the Phylum: Chordata,
from the Kingdom: Animalia.
Entering ten things and eighteen strings allows us to hop up and down the tree both ways.
Then we can grow the tree by adding new related taxons.