- Introduced `refer_to` slot to link identifiers to entities, with ontology alignment to CIDOC-CRM and DCTerms.
- Added `remove` slot for recording objects removed during deaccessioning, aligned with CIDOC-CRM properties.
- Created `reported_on` slot to capture URIs of reports documenting entities, with mappings to CIDOC-CRM and Schema.org.
- Implemented `signed_by` slot to identify individuals who signed documents, referencing RiC-O and Schema.org.
- Established `specified_as` slot to indicate the precision level of place references, with broad mappings to CRM and DQV.
