Associations are relationships between objects.
Each association references the associated objects with the @id keyword from JSON-LD.
Here is an example of a NIEM association j:OffenseLocationAssociation in JSON schema:
{
"$id": "http://release.niem.gov/niem/domains/jxdm/6.0/",
"$schema": "http://json-schema.org/draft-04/schema#",
"type": "object",
"additionalProperties": false,
"definitions": {
"j:Offense": {
"$ref": "#/definitions/j:OffenseType",
"description": "An act or a course of action which may constitute a violation of a criminal statute, ordinance or rule that occurred during an incident."
},
"j:OffenseLocationAssociation": {
"$ref": "#/definitions/j:OffenseLocationAssociationType",
"description": "A relationship between an offense and a location at which the offense occurred."
},
"j:OffenseLocationAssociationType": {
"additionalProperties": false,
"description": "A data type for a relationship between an offense and a location at which the offense occurred.",
"properties": {
"j:Offense": {
"description": "An act or a course of action which may constitute a violation of a criminal statute, ordinance or rule that occurred during an incident.",
"$ref": "#/definitions/j:Offense"
},
"nc:AssociationDescriptionText": {
"description": "A description of an association.",
"$ref": "./nc.schema.json#/definitions/nc:AssociationDescriptionText"
},
"nc:Location": {
"description": "A geospatial location.",
"$ref": "./nc.schema.json#/definitions/nc:Location"
}
},
"type": "object"
},
"j:OffenseType": {
"additionalProperties": false,
"description": "A data type for an alleged violation of a statute, ordinance, or rule.",
"properties": {
"nc:ActivityDate": {
"description": "A date of an activity.",
"$ref": "./nc.schema.json#/definitions/nc:ActivityDate"
},
"nc:ActivityDescriptionText": {
"description": "A description of an activity.",
"$ref": "./nc.schema.json#/definitions/nc:ActivityDescriptionText"
}
},
"type": "object"
}
},
"properties": {
"j:Offense": {
"$ref": "#/definitions/j:Offense",
"description": "An act or a course of action which may constitute a violation of a criminal statute, ordinance or rule that occurred during an incident."
},
"nc:Location": {
"$ref": "./nc.schema.json#/definitions/nc:LocationType",
"description": "A geospatial location."
},
"j:OffenseLocationAssociation": {
"$ref": "#/definitions/j:OffenseLocationAssociationType",
"description": "A relationship between an offense and a location at which the offense occurred."
}
},
"required": [
]
}
This schema references 2 other schemas: nc and xs
Here is a JSON instance of that association:
{
"@context": {
"j": "http://release.niem.gov/niem/domains/jxdm/6.0/#",
"nc": "http://release.niem.gov/niem/niem-core/4.0/#",
"xs": "http://www.w3.org/2001/XMLSchema#"
},
"j:Offense": {
"@id": "Offense1",
"nc:ActivityDate": {
"nc:DateTime": "2018-01-01"
},
"nc:ActivityDescriptionText": "Vandalism"
},
"nc:Location": {
"@id": "Location1",
"nc:Address": {
"nc:AddressFullText": "100 Main St.",
"nc:LocationCityName": "Springfield",
"nc:LocationStateName": "Illinois"
},
"nc:LocationDescriptionText": "Residence"
},
"j:OffenseLocationAssociation": {
"j:Offense": {
"@id": "Offense1"
},
"nc:Location": {
"@id": "Location1"
},
"nc:AssociationDescriptionText": "The location the offense occured"
}
}