"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:* If imported from a reference database (esp. a commercial one): The name of the database system or provider; otherwise empty. This information is important to prevent copyright violations! +
* If imported from a reference database (esp. a commercial one): The name of the database system or provider; otherwise empty. This information is important to prevent copyright violations! +
