The target_type property is incorrectly of type DataReferenceTargetDefinition

Problem/Motivation

We've noticed this bug because of #3068744: Not possible to filter by properties for items with multiple DataReferenceTargetDefinition properties — necessary for using filtering with Dynamic Entity Reference and Entity Reference Revisions → , which made us thinking if the target_type property should be of the type DataReferenceTargetDefinition and we think that it should not. The reason is that DataReferenceTargetDefinition stands for specific target, but an entity type simply is not a target. The bundle of an entity type might be a bundle, or a specific entity might be a target, but not the entity type itself. Therefore the property should be simply DataDefinition.

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet