--- sidebar_position: 2 --- # 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](#the-node-object) • Cardinality: ONE_ Represents the source node in the relation. ```json "source": { "id": "20|openorgs____::1cb75a3ad756e4c83e455e3e7347643b", "type": "organization" } ``` ### target _Type: [Node](#the-node-object) • Cardinality: ONE_ Represents the target node in the relation. ```json "target": { "id": "10|doajarticles::022409068174087a003647ff46070f7f", "type": "datasource" } ``` ### reltype _Type: [RelType](#the-reltype-object) • Cardinality: ONE_ Represent the semantics of the relation between two nodes of the graph. ```json "reltype": { "name": "provides", "type": "provision" } ``` ### provenance _Type: [Provenance](entities/other#provenance-1) • Cardinality: ONE_ Indicates the process that produced (or provided) the information. ```json "provenance": { "provenance": "Harvested", "trust":"0.900" } ``` ### validated _Type: Boolean • Cardinality: ONE_ Indicates weather or not the relation was validated. ```json "validated": true ``` ### validationDate _Type: String • Cardinality: ONE_ Indicates the validation date of the relation - applies only when the validated flag is set to true. ```json "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. ```json "id": "10|doajarticles::022409068174087a003647ff46070f7f" ``` ### type _Type: String • Cardinality: ONE_ Graph node type. ```json "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. ```json "name": "provides" ``` ### name _Type: String • Cardinality: ONE_ Further specifies the relation semantic, indicating the relation direction, e.g. Cites, isCitedBy. ```json "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](https://schema.datacite.org/meta/kernel-4.4/doc/DataCite-MetadataKernel_v4.4.pdf), which provides a description for them. | # | Source entity type | Target entity type | Relation name / inverse | Provenance | |:--:|:--------------------------------------:|:--------------------------------------:|:----------------------------------------------------------:|:-----------------------------------------------:| | 1 | [Project](entities/project) | [Result](entities/result) | produces / isProducedBy | Harvested, Inferred by OpenAIRE, Linked by user | | 2 | [Project](entities/project) | [Organization](entities/organization) | hasParticipant / isParticipant | Harvested | | 3 | [Project](entities/project) | [Community](entities/community) | IsRelatedTo / IsRelatedTo | Linked by user | | 4 | [Result](entities/result) | [Result](entities/result) | IsAmongTopNSimilarDocuments / HasAmongTopNSimilarDocuments | Inferred by OpenAIRE | | 5 | [Result](entities/result) | [Result](entities/result) | IsSupplementTo / IsSupplementedBy | Harvested | | 6 | [Result](entities/result) | [Result](entities/result) | IsRelatedTo / IsRelatedTo | Harvested, Inferred by OpenAIRE, Linked by user | | 7 | [Result](entities/result) | [Result](entities/result) | IsPartOf / HasPart | Harvested | | 8 | [Result](entities/result) | [Result](entities/result) | IsDocumentedBy / Documents | Harvested | | 9 | [Result](entities/result) | [Result](entities/result) | IsObsoletedBy / Obsoletes | Harvested | | 10 | [Result](entities/result) | [Result](entities/result) | IsSourceOf / IsDerivedFrom | Harvested | | 11 | [Result](entities/result) | [Result](entities/result) | IsCompiledBy / Compiles | Harvested | | 12 | [Result](entities/result) | [Result](entities/result) | IsRequiredBy / Requires | Harvested | | 13 | [Result](entities/result) | [Result](entities/result) | IsCitedBy / Cites | Harvested, Inferred by OpenAIRE | | 14 | [Result](entities/result) | [Result](entities/result) | IsReferencedBy / References | Harvested | | 15 | [Result](entities/result) | [Result](entities/result) | IsReviewedBy / Reviews | Harvested | | 16 | [Result](entities/result) | [Result](entities/result) | IsOriginalFormOf / IsVariantFormOf | Harvested | | 17 | [Result](entities/result) | [Result](entities/result) | IsVersionOf / HasVersion | Harvested | | 18 | [Result](entities/result) | [Result](entities/result) | IsIdenticalTo / IsIdenticalTo | Harvested | | 19 | [Result](entities/result) | [Result](entities/result) | IsPreviousVersionOf / IsNewVersionOf | Harvested | | 20 | [Result](entities/result) | [Result](entities/result) | IsContinuedBy / Continues | Harvested | | 21 | [Result](entities/result) | [Result](entities/result) | IsDescribedBy / Describes | Harvested | | 22 | [Result](entities/result) | [Organization](entities/organization) | hasAuthorInstitution / isAuthorInstitutionOf | Harvested, Inferred by OpenAIRE [(more)](relationships/hasAuthorInstitution) | | 23 | [Result](entities/result) | [Data source](entities/data-source) | isHostedBy / hosts | Harvested, Inferred by OpenAIRE | | 24 | [Result](entities/result) | [Data source](entities/data-source) | isProvidedBy / provides | Harvested | | 25 | [Result](entities/result) | [Community](entities/community) | IsRelatedTo / IsRelatedTo | Harvested, Inferred by OpenAIRE, Linked by user | | 26 | [Organization](entities/organization) | [Community](entities/community) | IsRelatedTo / IsRelatedTo | Linked by user | | 27 | [Organization](entities/organization) | [Organization](entities/organization) | IsChildOf / IsParentOf | Linked by user | | 28 | [Data source](entities/data-source) | [Community](entities/community) | IsRelatedTo / IsRelatedTo | Linked by user | | 29 | [Data source](entities/data-source) | [Organization](entities/organization) | isProvidedBy / provides | Harvested |