Another major innovation of the Semi-fungible token is its new token transfer model: the token(
_tokenID) transfer, or quantitative operations for SFTs, implemented by
(uint256_fromTokenID, uint256_toTokenID, uint256_value)
external payable and
(uint256_fromTokenID, uint256_toTokenID, uint256_value, bytes calldata _data)
external payable. This means that ERC-3525 tokens that share the same
_slot are fungible to each other, and that one ERC-3525 token(
_tokenID) may be transferred to another token, rather than another address. The feature marks the first time in history that an Ethereum token has gained equal status as users (externally owned accounts, or EOA) or smart contracts (contract accounts).