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interface HistoricalAssetMetadata {
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  name?: string;
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  description?: string;
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  image?: string;
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  attributes?: CHATAttribute[];
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  attributesExt?: ExtendedCHATAttribute[];
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}
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type CHATAttribute =
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  { trait_type: "Catalogue Level", value: string }
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  | { trait_type: "Publication / Creation Date", value: string }
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  | { trait_type: "Creator Name", value: string }
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  | { trait_type: "Creator Bio", value: string }
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  | { trait_type: "Asset Type", value: string }
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  | { trait_type: "Classification", value: string }
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  | { trait_type: "Materials and Technology", value: string }
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  | { trait_type: "Subject Matter", value: string }
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  | { trait_type: "Edition", value: string }
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  | { trait_type: "Series name", value: string }
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  | { trait_type: "Dimensions Unit", value: string }
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  | { trait_type: "Dimensions (height)", value: number }
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  | { trait_type: "Dimensions (width)", value: number }
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  | { trait_type: "Dimensions (depth)", value: number }
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  | { trait_type: "Inscriptions / Marks", value: string }
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  | { trait_type: "Current Owner", value: string }
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  | { trait_type: "Previous Owner", value: string }
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  | { trait_type: "Acquisition Date", value: string }
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  | { trait_type: "Citation", value: string }
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  | { trait_type: "Keyword", value: string }
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  | { trait_type: "Copyright Holder", value: string }
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  | { trait_type: "Bibliography", value: string }
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  | { trait_type: "Issuer", value: string }
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  | { trait_type: "Issue Timestamp", value: string }
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  | { trait_type: "Issuer Description", value: string }
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  | { trait_type: "Asset File Size", value: number }
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  | { trait_type: "Asset File Format", value: string }
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  | { trait_type: "Copyright / Restrictions", value: string }
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  | { trait_type: "Asset Creation Geo", value: string }
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  | { trait_type: "Asset Creation Location", value: string }
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  | { trait_type: "Asset Creation Coordinate", value: string }
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  | { trait_type: "Relevant Date", value: string }
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  | { trait_type: "Relevant Geo", value: string }
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  | { trait_type: "Relevant Location", value: string }
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  | { trait_type: "Relevant Person", value: string }
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  | { trait_type: "Relevant Entity", value: string }
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  | { trait_type: "Asset Language", value: string }
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  | { trait_type: "Is Physical Asset", value: boolean }
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type ExtendedCHATAttribute =
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  { trait_type: "Asset Full Text", value: string }
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  | { trait_type: "Exhibition / Loan History", value: string }
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  | { trait_type: "Copyright Document", value: string }
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  | { trait_type: "Provenance Record", value: string }
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  | { trait_type: "Asset URL", value: string }
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  | { trait_type: "Copyright Document of Underlying Asset", value: string }