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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 type	Target entity type	Relation type	Relation name	Inverse relation name
1	Project	Result	outcome	produces	isProducedBy
2	Project	Organization	participation	hasParticipant	isParticipant
3	Project	Community	relationship	isRelatedTo	isRelatedTo
4	Result	Result	similarity	isAmongTopNSimilarDocuments	HasAmongTopNSimilarDocuments
5	Result	Result	supplement	isSupplementTo	isSupplementedBy
6	Result	Result	relationship	isRelatedTo	isRelatedTo
7	Result	Result	relationship	IsPartOf	HasPart
8	Result	Result	relationship	IsDocumentedBy	Documents
9	Result	Result	relationship	IsObsoletedBy	Obsoletes
10	Result	Result	relationship	IsSourceOf	IsDerivedFrom
11	Result	Result	relationship	IsCompiledBy	Compiles
12	Result	Result	relationship	IsRequiredBy	Requires
13	Result	Result	citation	IsCitedBy	Cites
14	Result	Result	relationship	IsReferencedBy	References
15	Result	Result	relationship	IsReviewedBy	Reviews
16	Result	Result	relationship	IsOriginalFormOf	IsVariantFormOf
17	Result	Result	relationship	IsVersionOf	HasVersion
18	Result	Result	relationship	IsIdenticalTo	IsIdenticalTo
19	Result	Result	relationship	IsPreviousVersionOf	IsNewVersionOf
20	Result	Result	relationship	IsContinuedBy	Continues
21	Result	Result	relationship	IsDescribedBy	Describes
22	Result	Organization	affiliation	hasAuthorInstitution	isAuthorInstitutionOf
23	Result	Data source	provision	isHostedBy	hosts
24	Result	Data source	provision	isProvidedBy	provides
25	Result	Community	relationship	isRelatedTo	isRelatedTo
26	Organization	Community	relationship	isRelatedTo	isRelatedTo
27	Data source	Community	relationship	isRelatedTo	isRelatedTo
28	Data source	Organization	provision	isProvidedBy	provides