This page shows properties that are available and when filtered, only user-defined properties that match the condition are displayed. For a differentiated view, see the special page unused properties or wanted properties.
"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.
"Has subobject" is a predefined property representing a container construct that allows to accumulate property-value assignments similar to that of a normal wiki page.