"Has improper value for" is a predefined property to track input errors for irregular value annotations that was likely caused by type or allowed value restrictions.
en:Optional: The day of the publication date. [Note continued: if the true date is relevant, e.g. for the purpose of nomenclatural priority, it can be entered under DateSecondary.] //[RefMan 05: Y1,PY pro parte] +
Optional: The day of the publication date. [Note continued: if the true date is relevant, e.g. for the purpose of nomenclatural priority, it can be entered under DateSecondary.] //[RefMan 05: Y1,PY pro parte] +
