openaire-graph-docs/versioned_docs/version-5.1.3/data-model/relationships/relationship-object.md

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---
title: The Relationship object
---
# The `Relationship` object
A relationship in the Graph is represented with the data type presented in this page, which aims to model a directed edge between two nodes, providing information about its semantics, provenance and validation.
### 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](/data-model/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"
```
---