Here is the translation of the AIT standard NFT JSON schema:

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{
    "issuer": {
        "type": "string",
        "description": "Unique identifier of the NFT issuer"
    },
    "id": {
        "type": "string",
        "description": "Unique identifier of the NFT within the issuer"
    },
    "owner": {
        "type": "string",
        "description": "Ownership of the NFT, which can be a contract address"
    },
    "vest": {
        "type": "string",
        "description": "Belongs to another NFT"
    },
    "metadata": {
        "type": "string",
        "description": "Descriptive resource address, such as HTTP(s)/IPFS URI"
    },
    "protocol": {
        "type": "string",
        "description": "The protocol used by the NFT, in the format of protocol name:protocol contract address, where the address can be omitted"
    },
    "properties": {
        "type": "array",
        "description": "Set of properties for the NFT",
        "items": {
            "type": "object",
            "properties": {
                "name": {
                    "type": "string",
                    "description": "Name of the property"
                },
                "data": {
                    "type": "integer" | "string" | "array",
                    "description": "Value of the property"
                },
                "slot": {
                    "type": "array",
                    "description": "Slot for inserting another NFT",
                    "items": {
                        "$ref": "#"
                    }
                }
            }
        }
    }
}

issuer

Issuer identifier, which should be a contract address.

metadata

Metadata should be used as much as possible to store data. It follows a MIM common standard while also being extensible to meet the data requirements of different protocols.

protocol

Rights

owner

owner represents the owner of the NFT but does not necessarily mean that the ownership user has actual management rights. The owner only has management rights in the following cases:

• When vest is empty.
• When vest does not exist.
• When the owner of the NFT pointed to by vest is the same as the owner of this NFT.

vest

Vest represents the higher-level NFT to which the NFT belongs. A's vest can be B in the following two scenarios:

• When inserting A into the slot of B, A's vest must be B.
• When A is not in the slot of B but is owned by B. This is similar to the concept of "collection," where transferring B implies that A will be transferred simultaneously.

vest adds more flexibility to an NFT. For example, in the case of an advertising billboard NFT on a piece of land, it is not an indivisible part of the land or its essence. Therefore, it should not be designed as a property.

author

The original author of the NFT, which should be an address and should remain immutable.