Datatype register

Datatypes that may appear in a register

First published 4 August 2016

Last updated 1 November 2018 — see all updates

Category: Registers data

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About the data

There are 6 records and 3 fields in this register

Preview of 5 records


A CURIE defines a generic abbreviated syntax for expressing Uniform Resource Identifiers (URIs). e.g. [company:012345], [public-body:cabinet-office]. Relative values link to the register identified in the entry for the field in the field register.


A combination of a date and a time in the format CCYY-MM-DDThh:mm:ss[Z] as described in chapter 5.4 of ISO 8601. The value can be truncated to just the most significant digits, for example "2014-05". Time values, where present, should be in UTC.


A time interval as described in ISO 8601. The intervening time between two points can be described in four ways: start date and end date, start date and duration, duration and end date or duration only. A start date and end date must follow the datetime datatype and a duration must be formatted as described by ISO 8601.


A string of Unicode 6.2.x characters encoded as UTF-8.


A string of text which may contain Markdown formatting instructions.

The 3 fields in this register

Field name

Field description


The format of the data held in a field.


The stage of development a register is in. There are 4 phases - discovery, alpha, beta and live.


More information about a record in a register.