Use stable identifiers as join keys; labels are display text.
highlighted = computed this step
Identifiers are the join keys
A label can change, but a stable identifier is the key a program joins on. This tiny slice has 7 pinned records.
records=7
The prefix tells you what space the key lives in
The table keeps disease, gene, protein, function, and trial-like records in separate identifier spaces. The kind column is checked from the pinned spine, not typed into the lesson.