Metacrafter Registry

Datatypes

ULID (Universally Unique Lexicographically Sortable Identifier)

ID ulid

DatatypeNot PIIidentifier

128-bit identifier from the ULID specification. The first 48 bits are the Unix time in milliseconds and the other 80 bits are random, so values sort by creation time. The canonical form is 26 characters of Crockford's Base32 (digits and uppercase letters without I, L, O and U), 10 for the time and 16 for the randomness. The first character is 0 to 7, because 26 characters hold 130 bits and the largest ULID is 7ZZZZZZZZZZZZZZZZZZZZZZZZZ. The specification calls ULIDs case-insensitive; the regexp accepts the canonical uppercase form. A ULID has the same size as a UUID and is often stored in a UUID column.

Categories
Universal unique identifiers
Countries
Global (not tied to a country)
Languages
Common to most languages
Quality
90/100 · missing: mapping (Wikidata, Schema.org, ...)
Metacrafter rules
2 rules (1 by field name, 1 by value)
Supported by tools
metacrafter

Regular expression

^[0-7][0-9A-HJKMNP-TV-Z]{25}$

Python re syntax.

Examples

ValueDescription
01ARZ3NDEKTSV4RRFFQ69G5FAVExample of the ULID specification, created 2016-07-30
01AN4Z07BY79KA1307SR9X4MV3Example of the timestamp and randomness parts in the ULID specification
7ZZZZZZZZZZZZZZZZZZZZZZZZZLargest valid ULID
8ZZZZZZZZZZZZZZZZZZZZZZZZZ invalidExceeds 128 bits
01ARZ3NDEKTSV4RRFFQ69G5FAU invalidThe letter U is not in Crockford's Base32
01ARZ3NDEKTSV4RRFFQ69G5FA invalid25 characters

Translations

LanguageNameDescription
RussianULID (универсальный уникальный лексикографически сортируемый идентификатор)128-битный идентификатор из 48 бит времени Unix в миллисекундах и 80 случайных бит. Записывается 26 символами Base32 Крокфорда; значения сортируются по времени создания.

Sources

Use this record