"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:EAD is a non-proprietary de facto standard for the encoding of finding aids for use in a networked (online) environment published by the Library of Congress +
EAD is a non-proprietary de facto standard for the encoding of finding aids for use in a networked (online) environment published by the Library of Congress +