Date An ISO 8601 compliant date type. Syntax The date literal consists of the following values, separated by a -: either a four-digit year or a sign with any number of digits for the year (e.g. +252525 meaning year 252525), a two-digit month of the year, and a two-digit day of that month. Example date literals 2024-03-30 +802701-09-21 Defining a date valued attribute define attribute publish-date value date; Inserting a date valued attribute insert $_ isa publish-date 2025-01-10; String Datetime