The seat structure diagram

• a

  • Represents a non-creator called ‘actor’.

  • To achieve the goal of the smart contract, there should be n actor(s).

• b

  • Represents a creator, which is the entity that started the instance of the smart contract.

  • There is exactly 1 creator.

• c

  • Represents an object called ‘object’ of type ‘type’.

  • There can be n instance(s) of ‘object’ for 1 instance of the smart contract.

• d

  • An object called ‘object₁’ of type ‘type₁’ can generate n₃ instance of an object called ‘object₂’ of type ‘type₂’.

  • There can be n₁ instance(s) of ‘object₁’ for 1 instance of the smart contract.

  • There can be n₂ instance(s) of ‘object₂’ for 1 instance of the smart contract.

• e

  • An actor/creator can use 1 instance of an object called ‘object₁’ of type ‘type₁’ to generate n₃ instance of an object called ‘object₂’ of type ‘type₂’.

  • There can be n₁ instance(s) of ‘object₁’ for 1 instance of the smart contract.

  • There can be n₂ instance(s) of ‘object₂’ for 1 instance of the smart contract.

• f

  • Seat ‘seat₁’ and seat ‘seat₂’ trade with one another.

  • There can be n₁ instance(s) of ‘seat₁’ for 1 instance of the smart contract.

  • There can be n₂ instance(s) of ‘seat₂’ for 1 instance of the smart contract.

• g

  • Seat seat₁ and seat seat₂ are equal to one another.

  • There can be n₁ instance(s) of ‘seat₁’ for 1 instance of the smart contract.

  • There can be n₂ instance(s) of ‘seat₂’ for 1 instance of the smart contract.

• h

  • The smart contract uses another smart contract called "subcontract", of which all related objects are positioned in the orange box.