@maschinenlesbar.org/deutsche-digitale-bibliothek-cli
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    Variable itemIdProblemConst

    itemIdProblem: Problem = ...

    A DDB item id is exactly 32 upper-case letters and digits ([A-Z0-9]{32}). Ids are case sensitive upstream, so a lower-cased paste gets the upper-case form as a hint. Checks the value as given; normalizeItemId trims it first.