Skip to main content
Version: 5.0.0

Relationships

A relationship in the graph is represented by the following data type, which aims to model a directed edge between two nodes, providing information about the semantic of the relation, its provenance and validation.


The Relationship object

source

Type: Node Cardinality: ONE

Represents the source node in the relation.

"source": {
"id": "20|openorgs____::1cb75a3ad756e4c83e455e3e7347643b",
"type": "organization"
}

target

Type: Node Cardinality: ONE

Represents the target node in the relation.

"target": {
"id": "10|doajarticles::022409068174087a003647ff46070f7f",
"type": "datasource"
}

reltype

Type: RelType Cardinality: ONE

Represent the semantics of the relation between two nodes of the graph.

"reltype": {
"name": "provides",
"type": "provision"
}

provenance

Type: Provenance Cardinality: ONE

Indicates the process that produced (or provided) the information.

"provenance": {
"provenance": "Harvested",
"trust":"0.900"
}

validated

Type: Boolean Cardinality: ONE

Indicates weather or not the relation was validated.

"validated": true

validationDate

Type: String Cardinality: ONE

Indicates the validation date of the relation - applies only when the validated flag is set to true.

"validationDate": "2022-09-02"

The Node object

The Node data type contains the minimum information needed to identify a graph node, its identifier and entity type.

id

Type: String Cardinality: ONE

OpenAIRE identifier of the node in the graph.

"id": "10|doajarticles::022409068174087a003647ff46070f7f"

type

Type: String Cardinality: ONE

Graph node type.

"type": "datasource"

The RelType object

The RelType data type models the semantic of the relationship among two nodes.

type

Type: String Cardinality: ONE

Relation category, e.g. affiliation, citation, see table Relation typologies.

"name": "provides"

name

Type: String Cardinality: ONE

Further specifies the relation semantic, indicating the relation direction, e.g. Cites, isCitedBy.

"type": "provision"

Relationship types

The following table lists all the possible relation semantics found in the graph dump.

Note: the labels used to specify the semantic of the relationships are (for the large) inherited from the DataCite metadata kernel, which provides a description for them.

#Source entity typeTarget entity typeRelation typeRelation nameInverse relation name
1ProjectResultoutcomeproducesisProducedBy
2ProjectOrganizationparticipationhasParticipantisParticipant
3ProjectCommunityrelationshipisRelatedToisRelatedTo
4ResultResultsimilarityisAmongTopNSimilarDocumentsHasAmongTopNSimilarDocuments
5ResultResultsupplementisSupplementToisSupplementedBy
6ResultResultrelationshipisRelatedToisRelatedTo
7ResultResultrelationshipIsPartOfHasPart
8ResultResultrelationshipIsDocumentedByDocuments
9ResultResultrelationshipIsObsoletedByObsoletes
10ResultResultrelationshipIsSourceOfIsDerivedFrom
11ResultResultrelationshipIsCompiledByCompiles
12ResultResultrelationshipIsRequiredByRequires
13ResultResultcitationIsCitedByCites
14ResultResultrelationshipIsReferencedByReferences
15ResultResultrelationshipIsReviewedByReviews
16ResultResultrelationshipIsOriginalFormOfIsVariantFormOf
17ResultResultrelationshipIsVersionOfHasVersion
18ResultResultrelationshipIsIdenticalToIsIdenticalTo
19ResultResultrelationshipIsPreviousVersionOfIsNewVersionOf
20ResultResultrelationshipIsContinuedByContinues
21ResultResultrelationshipIsDescribedByDescribes
22ResultOrganizationaffiliationhasAuthorInstitutionisAuthorInstitutionOf
23ResultData sourceprovisionisHostedByhosts
24ResultData sourceprovisionisProvidedByprovides
25ResultCommunityrelationshipisRelatedToisRelatedTo
26OrganizationCommunityrelationshipisRelatedToisRelatedTo
27Data sourceCommunityrelationshipisRelatedToisRelatedTo
28Data sourceOrganizationprovisionisProvidedByprovides