Subclass of:

• aaao:ZE29 Transfer of Property Right
• crm:E8 Acquisition

Scope note:

Instances of this class comprise official acquisition events undertaken following formal procedures within a social grouping leading to formal ownership status over an object by some actor according to the participating parties. The substance of declarative acquisition is an intentional, social act. 

Instances of ZE20 Declarative Acquisition come about when the specific social procedure required is intentionally and successfully enacted according to the prevalent rules. They end with the successful termination of the act or because of its premature termination.

A successful act of ZE20 Declarative Acquisition leads to the generation of an instance of ZE8 Ownership Status, the institutional fact that thereafter mediates the social relation to this object until it has been abrogated.

Examples:

• The declarative acquisition of the territory of Louisiana (E27) by the United States of America (E74) in the 1803 signing of the Louisiana Purchase (https://en.wikipedia.org/wiki/Louisiana_Purchase)
• The declarative acquisition of the Gʼpsgolox totem pole (E22) by Olof Hanson (E21) with the permission granted by the Canadian Department of Indian Affairs (E74) in 1929. (https://en.wikipedia.org/wiki/G%CA%BCpsgolox_totem_pole)

In First Order Logic:

• ZE20(x) ⇒ ZE29(x)
• ZE20(x) ⇒ E8(x)