forked from D-Net/openaire-graph-docs
147 lines
4.9 KiB
Markdown
147 lines
4.9 KiB
Markdown
---
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sidebar_position: 2
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---
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# Relationships
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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.
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---
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## The `Relationship` object
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### source
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_Type: [Node](#the-node-object) • Cardinality: ONE_
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Represents the source node in the relation.
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```json
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"source": {
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"id": "20|openorgs____::1cb75a3ad756e4c83e455e3e7347643b",
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"type": "organization"
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}
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```
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### target
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_Type: [Node](#the-node-object) • Cardinality: ONE_
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Represents the target node in the relation.
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```json
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"target": {
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"id": "10|doajarticles::022409068174087a003647ff46070f7f",
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"type": "datasource"
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}
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```
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### reltype
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_Type: [RelType](#the-reltype-object) • Cardinality: ONE_
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Represent the semantics of the relation between two nodes of the graph.
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```json
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"reltype": {
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"name": "provides",
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"type": "provision"
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}
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```
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### provenance
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_Type: [Provenance](entities/other#provenance-1) • Cardinality: ONE_
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Indicates the process that produced (or provided) the information.
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```json
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"provenance": {
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"provenance": "Harvested",
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"trust":"0.900"
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}
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```
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### validated
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_Type: Boolean • Cardinality: ONE_
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Indicates weather or not the relation was validated.
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```json
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"validated": true
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```
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### validationDate
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_Type: String • Cardinality: ONE_
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Indicates the validation date of the relation - applies only when the validated flag is set to true.
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```json
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"validationDate": "2022-09-02"
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```
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---
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## The `Node` object
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The Node data type contains the minimum information needed to identify a graph node, its identifier and entity type.
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### id
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_Type: String • Cardinality: ONE_
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OpenAIRE identifier of the node in the graph.
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```json
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"id": "10|doajarticles::022409068174087a003647ff46070f7f"
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```
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### type
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_Type: String • Cardinality: ONE_
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Graph node type.
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```json
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"type": "datasource"
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```
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## The `RelType` object
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The RelType data type models the semantic of the relationship among two nodes.
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### type
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_Type: String • Cardinality: ONE_
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Relation category, e.g. affiliation, citation, see table Relation typologies.
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```json
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"name": "provides"
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```
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### name
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_Type: String • Cardinality: ONE_
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Further specifies the relation semantic, indicating the relation direction, e.g. Cites, isCitedBy.
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```json
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"type": "provision"
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```
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---
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## Relationship types
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The following table lists all the possible relation semantics found in the graph dump.
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| # | Source entity type | Target entity type | Relation type | Relation name | Inverse relation name |
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|:--:|:------------------:|:-------------------:|:-------------:|:---------------------------:|:----------------------------:|
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| 1 | [Project](entities/project) | [Result](entities/result) | outcome | produces | isProducedBy |
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| 2 | [Result](entities/result) | [Organization](entities/organization) | affiliation | hasAuthorInstitution | isAuthorInstitutionOf |
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| 3 | [Result](entities/result) | [Result](entities/result) | similarity | isAmongTopNSimilarDocuments | HasAmongTopNSimilarDocuments |
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| 4 | [Project](entities/project) | [Organization](entities/organization) | participation | isParticipant | hasParticipant |
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| 5 | [Result](entities/result) | [Result](entities/result) | supplement | isSupplementTo | isSupplementedBy |
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| 6 | [Result](entities/result) | [Result](entities/result) | relationship | isRelatedTo | isRelatedTo |
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| 7 | [Data source](entities/data-source) | [Organization](entities/organization) | provision | provides | isProvidedBy |
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| 8 | [Result](entities/result) | [Data source](entities/data-source) | provision | isHostedBy | hosts |
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| 9 | [Result](entities/result) | [Data source](entities/data-source) | provision | isProvidedBy | provides |
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| 10 | [Result](entities/result) | [Community](entities/community) | relationship | isRelatedTo | isRelatedTo |
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| 11 | [Organization](entities/organization) | [Community](entities/community) | relationship | isRelatedTo | isRelatedTo |
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| 12 | [Data source](entities/data-source) | [Community](entities/community) | relationship | isRelatedTo | isRelatedTo |
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| 13 | [Project](entities/project) | [Community](entities/community) | relationship | isRelatedTo | isRelatedTo |
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