OpenRiC Date-Type Vocabulary

Scheme IRI: https://openric.org/vocab/date-type/ Status: Active (spec v0.51.0) · Issued: 2026-10-19 · Licence: CC-BY 4.0 Machine-readable: date-type.ttl (Turtle)

A SKOS ConceptScheme of date-type concepts, referenced from rico:hasDateType on a date. Each concept is also a rico:DateType. In RiC-O 1.1, rico:hasDateType is an object property whose range is the class rico:DateType, so its value has to be a concept, not a string; RiC-O defines the class but publishes no vocabulary for it, so OpenRiC publishes these five.

Concepts

IRI	prefLabel	Definition	Source element
`existence`	Existence	The dates during which an agent existed, or during which a function was carried out.	ISAAR(CPF) 5.2.1 Dates of existence; ISDF 5.2.1 Dates.
`creation`	Creation	The dates at which the records were created.	ISAD(G) 3.1.3 Date(s), where the dates are of creation.
`accumulation`	Accumulation	The dates at which the records were accumulated, as distinct from when they were created.	ISAD(G) 3.1.3 Date(s), where the dates are of accumulation.
`descriptive`	Description	The dates at which the description itself was prepared or revised, not the dates of the records it describes.	ISAD(G) 3.7.3 Date(s) of descriptions.
`custody`	Custody	The dates during which an agent held custody of the records.	ISAD(G) 3.2.3 Archival history, where it dates a period of custody.

Use

"openricx:hasDateRangeSet": {
  "@type": "openricx:DateRange",
  "rico:beginningDate": { "@value": "1886-01-01", "@type": "xsd:date" },
  "rico:endDate": { "@value": "1950-09-11", "@type": "xsd:date" },
  "rico:hasDateType": { "@id": "https://openric.org/vocab/date-type/creation" }
}

Until v0.50.0, OpenRiC sent rico:hasDateType as a plain string ("existence", "creation" and so on). The strings map one to one onto these concepts.