ERC-721 standardized a common interface for non-fungible tokens on Ethereum so wallets, brokers and auction applications could work with compliant NFTs.

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Location PART 2 - FOUR HIDDEN CHIMNEYS CHAPTER 10: BUILDING-BLOCK REALITY Are Ideas Really Cheap?

"ERC-721 standardized a common interface for non-fungible tokens on Ethereum so wallets, brokers and auction applications could work with compliant NFTs."

ERC-721 is direct evidence for the composability point - a shared token interface let multiple applications operate on the same class of unique digital assets.

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Source title ERC-721: Non-Fungible Token Standard

Source authors William Entriken; Dieter Shirley; Jacob Evans; Nastassia Sachs

Source year 2018

Confidence high

Importance high