"license": "CC-BY-4.0", // (immutable) in frontend also show link to the SPDX-License-Identifier, which we should find in the SPDX database. If full copyright, field = NONE.
"license": "CC-BY-4.0", // (immutable) in frontend also show link to the SPDX-License-Identifier, which we should find in the SPDX database. If full copyright, field = NONE.
"license_dual": "GPLv3", // (mutable) less restrictive license then first license, could be added later, also as SPDX-License-Identifier
"license_dual": "GPLv3", // (mutable) less restrictive license then first license, could be added later, also as SPDX-License-Identifier
"license_addons": "", // e.g. additional rights, free text (mutable), e.g. Pixabay publishers, personal rights cleared (e.g. portrait)
"license_addons": "", // e.g. additional rights, free text (mutable), e.g. Pixabay publishers, personal rights cleared (e.g. portrait)
"license_DALICC": "http://dalicc.net/licenselibrary/CC-BY_v4" // machine readable and custom license, copied from license field if available,
"license_DALICC": "https://api.dalicc.net/licenselibrary/license/CC-BY-4.0" // machine readable and custom license, copied from license field if available,
"identifier": "", // e.g. ISBN number (mutable)
"identifier": "", // e.g. ISBN number (mutable)
"IPFS": " ", // ipfs URI (immutable)
"IPFS": " ", // ipfs URI (immutable)
"NFT": " ", // NFT-UID, URI to data in ipfs (immutable)
"NFT": " ", // NFT-UID, URI to data in ipfs (immutable)
