The trait_categories object consists of two tables (slots) that combined form
a relational database of a subset of PGS Catalog trait categories. Each score
is an observation (row) in the trait_categories
table (first table).
trait_categories
A table of trait categories. Columns:
Trait category name.
traits
A table of associated traits. Columns:
Trait category name.
An EFO identifier.
Trait name.
Detailed description of the trait from EFO.
External link to the EFO entry.