Glossary

Entity against which a digital asset represents liability or equity.

Enumerated list of external entity identifiers types for the issuer.

List of external entity identifiers for the issuer.

String containing the full name of the issuer, as represented in alphanumeric basic Latin characters.

Note 1 to entry: See ISO/IEC 2382 for a definition of “alphanumeric”.

String containing the full name of the issuer.

An entity responsible for the creation, maintenance or operation of the technical implementation of a digital token or distributed ledger.

Enumerated list of types of external entity identifier for the issuer.

List of external entity identifiers for the issuer.

String containing the full name of the maintainer, as represented in alphanumeric basic Latin characters.

Note 1 to entry: See ISO/IEC 2382 for a definition of “alphanumeric”.

String containing the full name of the maintainer.

A digital ledger is a computerized record-keeping system for financial and other data, which can be centralized or distributed. The term gained prominence with distributed ledger technology (DLT), where identical copies of the ledger are stored across multiple computers (nodes) in a network.

Earliest known and verifiable block in a blockchain. The anchor block is typically the blockchain genesis block.

Block hash of the anchor block. The anchor block hash is typically recorded in the block immediately following the anchor block.

Block hash algorithm used to produce the block hash of the anchor block.

Block height of the anchor block.

Timestamp recorded in the anchor block. Frequently, the anchor block UTC timestamp is in the anchor block header. The anchor block UTC timestamp is expressed in Coordinated Universal Time.

Category of systems implementing distributed ledger technology based on their consensus mechanisms. (Blockchain/Other).

Creation of two or more different versions of a distributed ledger originating from a common starting point with a single history.

Note 1 to entry: A fork can result in the creation of a new digital ledger.

Note 2 to entry: Terms such as hard fork and soft fork are sometimes used to distinguish backwards compatibility changes to the consensus mechanism of a blockchain. This document uses the term fork to encompass both scenarios.

[SOURCE: ISO 22739:2024]

Block having a block height equal to the fork block height data element specified in a fork record.

Block hash of the block with a block height equal to the fork block height.

Block hash algorithm of the fork block.

Note 1 to entry: The fork block hash algorithm may differ from the anchor block hash algorithm when a fork defines a new block hash algorithm as part of a consensus mechanism change.

Block height of the first block after a fork.

Note 1 to entry: When a digital token is created as a result of a fork, the original blockchain and the new blockchain are identical for all blocks with a block height less than the fork block height. Blocks on the original and the new blockchains at the block height equal to or greater than the fork block height will differ.

Timestamp recorded in the fork block.

Note 1 to entry: Frequently, the fork block UTC timestamp is located in the fork block header (data structure that includes a cryptographic link to the previous block [ISO 22739:2024]).

Note 2 to entry: The fork block UTC timestamp is expressed in Coordinated Universal Time.

Binary choice denoting, if true, that the consensus mechanism used to validate the block at the fork block height identified in the fork record differs from the consensus mechanism used to validate the block immediately prior to the block at the fork block height identified in the fork record.

Binary choice indicating whether the base record’s distributed ledger identifier references a new ledger from a fork (true) or the entire ledger history (false).

String containing the full name of the digital ledger, as represented in alphanumeric basic Latin characters original language digital ledger long name.

Short name or ticker symbol used to represent this digital ledger.

Uniform resource locator (URL) pointing to the digital ledger’s reference implementation or software repository.

Binary choice indicating, if true, that access to reading the distributed ledger is unrestricted, and the data elements specified in this document are accessible for independent verification by the general public.

The difference between the typically displayed block number and the block height.

Single digital token that can be transacted on a distributed ledger with no further protocol-level identification required.

Non-protocol digital token created as an application on an existing blockchain or other distributed ledger technology for its issuance, storage or transaction record which is explicitly identified within the distributed ledger technology protocol.

Note 1 to entry: A distributed ledger may support zero or more auxiliary digital tokens.

Assigned digital ledger identifier of the distributed ledger used for issuance, storage or transaction record of an auxiliary digital token. If relevant distribution ledger is not listed, please contact [email protected].

EXAMPLE: If registering an ERC-20 token operating on the Ethereum blockchain, this data element will contain the DLI assigned to the Ethereum blockchain.

Protocol used to create an auxiliary digital token. Note 1 to entry: This definition does not consider the concept of token lifecycle, only its creation.

EXAMPLE: ERC-20 (used for Ethereum) and Omni Layer (used for Bitcoin).

Element, such as a smart contract address, used to uniquely identify the origin of an auxiliary digital token on a distributed ledger technology platform.

Categorization of the digital token identifier within the registry.

String containing the full name of the digital token, as represented in alphanumeric basic Latin characters.

Short name or ticker symbol used to represent this digital token, as represented in alphanumeric basic Latin characters.

Note 1 to entry: See ISO/IEC 2382 for a definition of “alphanumeric”.

String containing the full name of the digital token.

Short name or ticker symbol used to represent this digital token.

Enumerated list expressing the types of digital asset external identifiers for the digital token.

List of digital asset external identifiers for the digital token.

Enumerated list of types of external identifier for the digital token.

List of other external identifiers for the digital token.

Multiplier used to map from the unit of value associated with the digital token long name to the unit of value stored on the distributed ledger.

EXAMPLE: 1. Bitcoin has a digital token unit multiplier of 100 000 000. 2. Bitcoin multiplied by 100 000 000 equals 200 000 000 units of value (satoshi) stored on the Bitcoin blockchain. 3. multiplier for Bitcoin is 8 or 100000000.

Single digital token that can be transacted on a distributed ledger with no further protocol-level identification required.

Note 1 to entry: A distributed ledger can have no protocol digital tokens or one default protocol digital token.

Categorization of the digital token identifier within the registry.

Points to the Distributed Ledger Identifier in which the protocol token is in. If relevant distribution ledger is not listed, please contact [email protected].

String containing the full name of the digital token, as represented in alphanumeric basic Latin characters.

Short name or ticker symbol used to represent this digital token, as represented in alphanumeric basic Latin characters.

Note 1 to entry: See ISO/IEC 2382 for a definition of “alphanumeric”.

String containing the full name of the digital token.

Short name or ticker symbol used to represent this digital token.

Enumerated list expressing the types of digital asset external identifiers for the digital token.

List of digital asset external identifiers for the digital token.

Enumerated list of types of external identifier for the digital token.

List of other external identifiers for the digital token.

Multiplier used to map from the unit of value associated with the digital token long name to the unit of value stored on the distributed ledger.

EXAMPLE: 1. Bitcoin has a digital token unit multiplier of 100 000 000. 2. Bitcoin multiplied by 100 000 000 equals 200 000 000 units of value (satoshi) stored on the Bitcoin blockchain. 3. multiplier for Bitcoin is 8 or 100000000.

Set of digital tokens which are not technically compatible but considered equivalent in one or more specific use cases.

Note 1 to entry: The presence of tokens within an equivalent digital token group does not imply fungibility in a regulatory or legal sense.

Categorization of the digital token identifier within the registry.

NOTE 1: This is a listing of DTIs representing the equivalent digital token group (DTI type = 0, 1 or 4).

Reasons for applying for the EDTG. This is divided into three categories:

1. 1. Architectural: The tokens share the same architecture including how the tokens are represented, market capitalisation, price, etc.
   2. Organisational: Tokens are issued or maintained by the same entity.
   3. Technical: Tokens share the same token mechanism, contract, code, etc.

String containing the full name of the digital token, as represented in alphanumeric basic Latin characters.

Short name or ticker symbol used to represent this digital token, as represented in alphanumeric basic Latin characters.

Note 1 to entry: See ISO/IEC 2382 for a definition of “alphanumeric”.

String containing the full name of the digital token.

Short name or ticker symbol used to represent this digital token.

Enumerated list expressing the types of digital asset external identifiers for the digital token.

List of digital asset external identifiers for the digital token.

Enumerated list of types of external identifier for the digital token.

List of other external identifiers for the digital token.

NFT stands for non-fungible token, a unique digital asset representing ownership of a real-world or digital item, such as art, music, or video, that is stored on a blockchain. Unlike fungible assets like money or cryptocurrency, which are identical and interchangeable, each NFT is one-of-a-kind, serving as a certificate of authenticity and ownership verified by a unique digital code on a digital ledger.

Categorization of the digital token identifier within the registry.

Binary choice indicating, if true, that the digital token identifier (DTI) is associated with a non-fungible token group, and if false, that the DTI is associated with a unique, individual non-fungible token.

Protocol used to create non-fungible tokens.

EXAMPLE: ERC-721 (used for Ethereum).

Protocol used to create non-fungible tokens.

EXAMPLE: ERC-721 (used for Ethereum).

Element, such as a smart contract address, used to uniquely identify a non-fungible token (NFT)’s origin on a distributed ledger technology platform.

Note 1 to entry: This can identify an individual NFT or an NFT group.

Note 2 to entry: For each NFT implementation mechanism, refer to the specifications of the element, including the syntax for that element, on the registration authority website. The name and contact information of the registration authority for this document can be found at https://www.iso.org/maintenance_agencies.html.

Note 3 to entry: For example, for an NFT implementation mechanism ERC-721, the NFT technical reference is likely to be a smart contract address with a designated syntax.

String containing the full name of the digital token, as represented in alphanumeric basic Latin characters.

Short name or ticker symbol used to represent this digital token, as represented in alphanumeric basic Latin characters.

Note 1 to entry: See ISO/IEC 2382 for a definition of “alphanumeric”.

String containing the full name of the digital token.

Short name or ticker symbol used to represent this digital token.

Enumerated list expressing the types of digital asset external identifiers for the digital token.

List of digital asset external identifiers for the digital token.

Enumerated list of types of external identifier for the digital token.

List of other external identifiers for the digital token.