Data quality · The causes · Element
The origin
Which collection step produces the error.
The part
What it is
Traced by following bad records back to where they were created, which is a short exercise with a concentrated answer.
Manual entry, optional fields and free text are the three usual suspects.
The smallest level
The attributes it carries
Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.