> For the complete documentation index, see [llms.txt](https://codex.desci.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://codex.desci.com/data-layer-definition/entities/relational-information.md).

# Relational information

The entities in this section act as links or relations between other entities, adding meaningful edges to the graph for analytics and credit tracking. Note that this selection of entities do not capture the entire metadata capability of the system, only to model the graph relations for a subset of properties.

The entities[Research object](/data-layer-definition/entities/research-object.md) and [Research component](/data-layer-definition/entities/research-component.md) can both hold uncapped collections of arbitrary metadata, and the [Attestation](/data-layer-definition/entities/attestation.md) captures community suggestions for said metadata and is technically applicable to any type of entity.