How this property depends on its owner property: DEPENDENCY_RELATION_FILTER limits its values to those that belong to the owner property's value, DEPENDENCY_RELATION_FILL fills it automatically from the owner property's value.Values: DEPENDENCY_RELATION_NOTHING (0), DEPENDENCY_RELATION_FILL (1), DEPENDENCY_RELATION_FILTER (2).
PropertyDef.owner_property_def_info -- For a lookup property, the property whose value limits this property's values. For example, Workflow State (39) is limited by Workflow (38). A property_def of -106 means that the owner property is determined automatically.
