In the PARHOST1 system information is entered not directly, i.e.
in the form of arbitrary text records, but by means of selecting
a record from the hierarchical table.
As a result, in the PARHOST1 system factographic tables were created
on the basis of several initial classifier tables, i.e. tables of
relations of 1835 flea species with 544 species of birds and 1644
species of mammals and also tables of distribution of 1835 flea species
in 40 zoogeographic regions.