The canonical form of an item id: surrounding whitespace (a copy-paste, $(...), a CSV cell) trimmed, then checked with itemIdProblem. Throws a DdbValidationError (Invalid id: …) for anything else. Idempotent.
$(...)
Invalid id: …
The canonical form of an item id: surrounding whitespace (a copy-paste,
$(...), a CSV cell) trimmed, then checked with itemIdProblem. Throws a DdbValidationError (Invalid id: …) for anything else. Idempotent.