Introduction
The Group API is a method of getting access to descriptions of sets of people and/or subgroups, such as families, organizations, companies, departments or any other identifiable set of actors. The Group model is of average complexity with many familiar properties and patterns, plus a few more specific fields. This results in an average complexity API, which is very similar to the Person API, that can result in reasonably long JSON responses if all of the fields have values.
For more information about the usage of Group data, please see the Group model description.
Property Definitions
Dereferencing an entity via the Group endpoint would result in a JSON-LD document containing a single JSON object with the following properties.
Properties of Groups
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 group's representation can be dereferenced |
type |
string | Required | The class for the group, which MUST be the value "Group" |
_label |
string | Recommended | A human readable label for the group, intended for developers |
classified_as |
array | Recommended | An array of json objects, each of which is a classification of the group and MUST follow the requirements for Type |
identified_by |
array | Recommended | An array of json objects, each of which is a name of the group and MUST follow the requirements for Name, or an identifier for the group 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 group 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 group |
representation |
array | Optional | An array of json objects, each of which is a reference to a Visual Work that represents the current group, and MUST follow the requirements for a reference |
member_of |
array | Optional | An array of json objects, each of which is a Group that the current group is a member of and MUST follow the requirements for a reference to a Group |
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 group, 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 group to another entity |
contact_point |
array | Optional | An array of json objects, each of which is an address at which the group is reachable and MUST follow the requirements for an Identifier |
residence |
array | Optional | A place that the group was associated with, and MUST follow the requirements for a reference to a Place |
carried_out |
array | Optional | An array of json objects, each of which represents professional activities of the group and follows the requirements for Activities |
participated_in |
array | Optional | An array of json objects, each of which represents an activity or event in which the group participated, but was not responsible, and follows the requirements for Activities |
formed_by |
json object | Optional | A json object representing the formation of the group, which follows the requirements for a Formation |
dissolved_by |
json object | Optional | A json object representing the dissolution of the group, which follows the requirements for a Dissolution |
Property Diagram
JSON Schema
See the schema documentation and the schema itself
Incoming Properties
Group 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 groups.
Property Name | Source Endpoint | Description |
---|---|---|
member_of |
Person, Group | People that are members of the current Group are recorded in the Person record |
carried_out_by |
All | An activity that the Group carried out |
current_owner |
Object | An object owned by the Group |
current_custodian |
Object | An object in the custody of the Group |
current_permanent_custodian |
Object | An object that is normally in the custody of the Group |
represents |
Visual Work | Image content which represents the Group (the inverse of representation ) |
about |
Textual Work | Textual content that is about the Group |
transferred_custody_to |
Provenance | The activity of transferring custody of an object to the Group |
transferred_custody_from |
Provenance | The activity of transferring custody of an object away from the Group |
transferred_title_to |
Provenance | The activity of transferring ownership of an object to the Group |
transferred_title_from |
Provenance | The activity of transferring ownership of an object away from the Group |
paid_to |
Provenance | The activity of paying money to the Group from someone else |
paid_from |
Provenance | The activity of paying money from the Group to someone else |
Example
The JSON for a Group entry for the Camden Town Group 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 "Group" - It has a
_label
with the value "Camden Town Group" for people reading the JSON - It is
classified_as
...- ... a "Society", which has an
id
of "aat:300026009" - ... "British", which as an
id
of "aat:300111159" and a meta-type of "Nationality", which has anid
of "aat:300379842"
- ... a "Society", which has an
- It is
identified_by
aName
, with the content "Camden Town Group", andlanguage
of English ("aat:300388277") - It is
referred_to_by
a statement which ...- ... has
content
of "A group of British painters formed in 1911 ..." - ... is
classified_as
a Biography ("aat:300435422")
- ... has
- It
carried_out
its professional activities ...- ... in a
timespan
between "1911-01-01" and "1913-12-31"
- ... in a
- It is
attributed_by
an "AttributeAssignment" relationship- ... to the London Group, with
id
"ulan:500117319"
- ... to the London Group, with
- It has a
residence
of London - It is
equivalent
to the ULAN entry `"ulan:500117318" - It was
formed_by
a Formation which ...- ...
took_place_at
London - ... in a
timespan
between "1911-01-01" and "1911-12-31"
- ...
- It was
dissolved_by
a Dissolution which ...- ...
took_place_at
London again - ... in a
timespan
between "1913-01-01" and "1913-12-31"
- ...
{
"@context": "https://linked.art/ns/v1/linked-art.json",
"id": "https://linked.art/example/group/0",
"type": "Group",
"_label": "Camden Town Group",
"classified_as": [
{
"id": "http://vocab.getty.edu/aat/300026009",
"type": "Type",
"_label": "Society"
},
{
"id": "http://vocab.getty.edu/aat/300111159",
"type": "Type",
"_label": "British",
"classified_as": [
{
"id": "http://vocab.getty.edu/aat/300379842",
"type": "Type",
"_label": "Nationality"
}
]
}
],
"identified_by": [
{
"type": "Name",
"content": "Camden Town Group",
"language": [
{
"id": "http://vocab.getty.edu/aat/300388277",
"type": "Language",
"_label": "English"
}
]
}
],
"referred_to_by": [
{
"type": "LinguisticObject",
"classified_as": [
{
"id": "http://vocab.getty.edu/aat/300435422",
"type": "Type",
"_label": "Biography Statement",
"classified_as": [
{
"id": "http://vocab.getty.edu/aat/300418049",
"type": "Type",
"_label": "Brief Text"
}
]
}
],
"content": "A group of British painters formed in 1911; although it only lasted two years, its name is used in a broader sense to characterize a particular strain of British painting from about 1905 to 1920."
}
],
"carried_out": [
{
"type": "Activity",
"_label": "Active Dates",
"classified_as": [
{
"id": "http://vocab.getty.edu/aat/300393177",
"type": "Type",
"_label": "Professional Activities"
}
],
"timespan": {
"type": "TimeSpan",
"begin_of_the_begin": "1911-01-01T00:00:00Z",
"end_of_the_end": "1913-12-31T23:59:59Z"
}
}
],
"formed_by": {
"type": "Formation",
"_label": "Formation of the Group",
"timespan": {
"type": "TimeSpan",
"_label": "1911",
"begin_of_the_begin": "1911-01-01T00:00:00Z",
"end_of_the_end": "1911-12-31T23:59:59Z"
},
"took_place_at": [
{
"type": "Place",
"_label": "London"
}
]
},
"dissolved_by": {
"type": "Dissolution",
"_label": "Dissolution of the Group",
"timespan": {
"type": "TimeSpan",
"_label": "1913",
"begin_of_the_begin": "1913-01-01T00:00:00Z",
"end_of_the_end": "1913-12-31T23:59:59Z"
},
"took_place_at": [
{
"type": "Place",
"_label": "London"
}
]
},
"residence": [
{
"type": "Place",
"_label": "London"
}
],
"equivalent": [
{
"id": "http://vocab.getty.edu/ulan/500117318",
"type": "Group",
"_label": "Camden Town Group"
}
],
"attributed_by": [
{
"type": "AttributeAssignment",
"_label": "Related Group",
"assigned": [
{
"id": "http://vocab.getty.edu/ulan/500117319",
"type": "Group",
"_label": "London Group"
}
]
}
]
}