Events
Introduction
The Event API is a method of getting access to descriptions of periods of time, events or activities that are not directly associated with other entities, nor are provenance activities or exhibitions, but are still noteworthy occurences somehow related to artwork. Examples might include a fire that burnt down a museum, thereby causing the destruction of many works of art, a project that researched aspects of works of art, or a named period during which objects were created. Although these are different classes, they are so similar in this usage that they are grouped together into a single endpoint from the perspective of the API. The Event API is of average complexity with many familiar properties and patterns of other endpoints, plus the event and activity properties familiar from embedded events.
Property Definitions
Dereferencing an entity via the Event endpoint would result in a JSON-LD document containing a single JSON object with the following properties.
Properties of Events
Property Name | Datatype | Requirement | Description |
---|---|---|---|
@context |
string, array | Required | The value MUST be the URI of the Linked Art context as a string, "https://linked.art/ns/v1/linked-art.json" or an array in which the URI is the last entry to allow for extensions |
id |
string | Required | The value MUST be the HTTP(S) URI at which the event's representation can be dereferenced |
type |
string | Required | The class for the event, which MUST be the value "Period" , "Event" or "Activity" |
_label |
string | Recommended | A human readable label for the event, intended for developers |
classified_as |
array | Recommended | An array of json objects, each of which is a classification of the event and MUST follow the requirements for Type |
identified_by |
array | Recommended | An array of json objects, each of which is a name/title of the event and MUST follow the requirements for Name, or an identifier for the event and MUST follow the requirements for Identifier |
referred_to_by |
array | Optional | An array of json objects, each of which is a human readable statement about the event and MUST follow the requirements for Statement |
equivalent |
array | Optional | An array of json objects, each of which is a reference to an external identity and description of the current event |
representation |
array | Optional | An array of json objects, each of which is a reference to a Visual Work that represents the current event, and MUST follow the requirements for a reference |
member_of |
array | Optional | An array of json objects, each of which is a Set that the current event is a member of and MUST follow the requirements for a reference to a Set |
subject_of |
array | Optional | An array of json objects, each of which is a reference to a Textual Work, the content of which focuses on the current event, and MUST follow the requirements for a reference |
attributed_by |
array | Optional | An array of json objects, each of which is a Relationship Assignment that relates the current event to another entity |
part_of |
array | Optional | An array of json objects, each of which is a reference to another Event that the current event is directly a part of. |
timespan |
json object | Recommended | A json object recording when the event occured, which MUST follow the requirements for timespans |
during |
array | Optional | An array of json objects, each of which is a reference to a broad Period during which this event occured |
before |
array | Optional | An array of json objects, each of which is a reference to a Period, Event or Activity before which this event occured |
after |
array | Optional | An array of json objects, each of which is a reference to a Period, Event or Activity after which this event occured |
took_place_at |
array | Optional | An array of json objects, each of which is a reference to a Place where the event occured |
caused_by |
array | Optional | An array of json objects, each of which is a reference to another Event that caused this event to occur. Only usable when the type is "Event" or "Activity" |
influenced_by |
array | Optional | An array of json objects, each of which is a reference to an entity that influenced the event in some noticable fashion. Only usable when the type is "Activity" |
carried_out_by |
array | Optional | An array of json objects, each of which is a reference to a Person or Group that carried out the activity. Only usable when the type is "Activity" |
participant |
array | Optional | An array of json objects, each of which is a reference to a Person or Group that participated in the event but did not carry it out. Only usable when the type is "Event" or "Activity"` |
used_specific_object |
array | Optional | An array of json objects, each of which is a reference] to an entity that was instrumental in the carrying out of the activity. Only usable when the type is "Activity" |
technique |
array | Optional | An array of json objects, each of which is a technique used in the activity and MUST follow the requirements for Type. Only usable when the type is "Activity" |
Property Diagram
JSON Schema
See the schema documentation and the schema itself
Incoming Properties
Event instances are typically found as the object of the following properties, other than the self-referential properties above. This list is not exhaustive, but is intended to cover the likely cases where other endpoints refer to events.
Property Name | Source Endpoint | Description |
---|---|---|
part_of |
All | Any other event or activity in any of the end points can be part_of a broader period, event or activity. This implies that the spatial and temporal constraints of the broader event apply also to the referencing event. |
Example
The JSON for an Event describing an auction in 1820 could be as below.
- It has the Linked Art context document reference in
@context
- It self-documents its URI in
id
- It has a
type
of "Activity" (as it is carried out by some Group, thus it is not an Event or Period) - It has a
_label
with the value "Foster Auction of March 1820" for people reading the JSON - It is
classified_as
an "Auction Event", which has anid
of "aat:300054751" - It is
identified_by
...- ... a
Name
, with the content "Edward Foster Auction of March 1820" - ... and an
Identifier
, with the content "Br1908", which isclassified_as
an Owner-Assigned number ("aat:300404621")
- ... a
- It is
referred_to_by
a statement which ...- ... has
content
of "Besides paintings, this sale ..." - ... is
classified_as
a Description ("aat:300435416")
- ... has
- It has a
timespan
which ...- ... has a display title, with the
content
"1820 Mar 09" - ... has a
begin_of_the_begin
with the value "1820-03-09T00:00:00Z" (the earliest possible time on March 9th) - ... has an
end_of_the_end
with the value "1820-03-09T23:59:59Z" (the latest possible time on March 9th)
- ... has a display title, with the
- It
took_place_at
London - It was
carried_out_by
the Group "Edward Foster & Son" - It
used_specific_object
of a Set, encompassing all of the auction lots - It is
equivalent
to another description of the same event at example.auction - It is the
subject_of
the text of a Sales Catalog
{
"@context": "https://linked.art/ns/v1/linked-art.json",
"id": "https://linked.art/example/event/0",
"type": "Activity",
"_label": "Foster Auction of March 1820",
"classified_as": [
{
"id": "http://vocab.getty.edu/aat/300054751",
"type": "Type",
"_label": "Auction Event"
}
],
"identified_by": [
{
"type": "Name",
"content": "Edward Foster Auction of March 1820"
},
{
"type": "Identifier",
"classified_as": [
{
"id": "http://vocab.getty.edu/aat/300404621",
"type": "Type",
"_label": "Owner-Assigned Number"
}
],
"content": "Br1908"
}
],
"referred_to_by": [
{
"type": "LinguisticObject",
"classified_as": [
{
"id": "http://vocab.getty.edu/aat/300435416",
"type": "Type",
"_label": "Description",
"classified_as": [
{
"id": "http://vocab.getty.edu/aat/300418049",
"type": "Type",
"_label": "Brief Text"
}
]
}
],
"content": "Besides paintings, this sale included a few lots with musical instruments and watches. The owners were a number of dealers who regularly consigned their wares to this auctioneer, despite the fact that the title page names \"A Gentleman\" as the owner."
}
],
"timespan": {
"type": "TimeSpan",
"identified_by": [
{
"type": "Name",
"classified_as": [
{
"id": "http://vocab.getty.edu/aat/300404669",
"type": "Type",
"_label": "Display Title"
}
],
"content": "1820 Mar 09"
}
],
"begin_of_the_begin": "1820-03-09T00:00:00Z",
"end_of_the_end": "1820-03-09T23:59:59Z"
},
"took_place_at": [
{
"id": "http://vocab.getty.edu/tgn/7011781",
"type": "Place",
"_label": "London"
}
],
"carried_out_by": [
{
"id": "http://vocab.getty.edu/ulan/500451765",
"type": "Group",
"_label": "Edward Foster & Son"
}
],
"used_specific_object": [
{
"id": "http://example.org/sets/Br1908",
"type": "Set",
"_label": "All Auction Lots of Br1908"
}
],
"equivalent": [
{
"id": "http://example.auction/past/foster/1820/03/1",
"type": "Activity"
}
],
"subject_of": [
{
"id": "http://example.org/catalog/Br1908",
"type": "LinguisticObject",
"_label": "Sales Catalog of Br-1908"
}
]
}