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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.
target
Type: Node • Cardinality: ONE
Represents the target node in the relation.
reltype
Type: RelType • Cardinality: ONE
Represent the semantics of the relation between two nodes of the graph.
provenance
Type: Provenance • Cardinality: ONE
Indicates the process that produced (or provided) the information.
validated
Type: Boolean • Cardinality: ONE
Indicates weather or not the relation was validated.
validationDate
Type: String • Cardinality: ONE
Indicates the validation date of the relation - applies only when the validated flag is set to true.
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.
type
Type: String • Cardinality: ONE
Graph node type.
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
Type: String • Cardinality: ONE
Further specifies the relation semantic, indicating the relation direction, e.g. Cites, isCitedBy.
Relationship types
The following table lists all the possible relation semantics found in the graph dump.
| # | source entity type | target entity type | relType.type | relType.name | relType.name (inverse) |
|---|---|---|---|---|---|
| 1 | Project | Result | outcome | produces | isProducedBy |
| 2 | Result | Organization | affiliation | hasAuthorInstitution | isAuthorInstitutionOf |
| 3 | Result | Result | similarity | isAmongTopNSimilarDocuments | HasAmongTopNSimilarDocuments |
| 4 | Project | Organization | participation | isParticipant | hasParticipant |
| 5 | Result | Result | supplement | isSupplementTo | isSupplementedBy |
| 6 | Result | Result | relationship | isRelatedTo | isRelatedTo |
| 7 | Data source | Organization | provision | provides | isProvidedBy |
| 8 | Result | Data source | provision | isHostedBy | hosts |
| 9 | Result | Data source | provision | isProvidedBy | provides |
| 10 | Result | CommunityInitiative | relationship | isRelatedTo | isRelatedTo |
| 11 | Organization | CommunityInitiative | relationship | isRelatedTo | isRelatedTo |
| 12 | Data source | CommunityInitiative | relationship | isRelatedTo | isRelatedTo |
| 13 | Project | CommunityInitiative | relationship | isRelatedTo | isRelatedTo |