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# Data model
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The OpenAIRE Graph comprises several types of [entities ](../category/entities ) and [relationships ](/category/relationships ) among them.
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The latest version of the JSON schema can be found on the [Downloads ](../downloads/full-graph ) section.
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< p align = "center" >
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< img loading = "lazy" alt = "Data model" src = {require('../assets/img/data-model-2.png').default} width = "80%" className = "img_node_modules-@docusaurus-theme-classic-lib-theme-MDXComponents-Img-styles-module" / >
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< / p >
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The figure above, presents the graph's data model.
Its main entities are described in brief below:
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* [Results ](/data-model/entities/result ) represent the outcomes (or products) of research activities.
* [Data Sources ](/data-model/entities/data-source ) are the sources from which the metadata of graph objects are collected.
* [Organizations ](/data-model/entities/organization ) correspond to companies or research institutions involved in projects,
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responsible for operating data sources or consisting the affiliations of Product creators.
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* [Projects ](/data-model/entities/project ) are research project grants funded by a Funding Stream of a Funder.
* [Communities ](/data-model/entities/community ) are groups of people with a common research intent (e.g. research infrastructures, university alliances).
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:::note Further reading
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A detailed report on the OpenAIRE Graph Data Model can be found on [Zenodo ](https://zenodo.org/record/2643199 ).
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:::
