> ## Documentation Index
> Fetch the complete documentation index at: https://docs.clinia.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Partitions

> Understand how partitions expose unified data for search and downstream consumption

Partitions are read-optimized views over MDM data from one or more sources. They draw from collections that have gone through entity resolution and reconciliation, delivering deduplicated and normalized records. Each partition declares:

* **Which resources and relationships are exposed** — Each collection entry specifies the property schema and source mappings that describe how MDM output maps to the partition's indexed fields.
* **Reconciliation strategies** — How conflicting attribute values are merged (latest, earliest, aggregated, or custom logic).
* **Cross-source joins** — Unified relationships let you traverse across systems without denormalizing the data first.
* **Traversal rules** — Which related properties can be projected into the query context. Learn how this powers filtering in [Traversed property filters](/guides/search/traversed-property).
* **Governance** — MDM policies ensure that only curated, steward-approved data feeds downstream applications.

## Traversed properties

Traversal rules let you bring attributes from related resources or contained structures into the current query scope. That enables filters such as "clinics that offer a related service with code `cardiology`" without copying data. Traversals are explicit and bounded, which keeps query plans predictable and prevents accidental fan-out.

## Keep exploring

<CardGroup cols={2}>
  <Card title="Partitions" icon="arrows-right-left" href="/explanation/partitions/mdm-partition">
    Understand how records are reconciled before hitting downstream apps.
  </Card>

  <Card title="Traversed properties" icon="arrows-pointing-out" href="/explanation/partitions/mdm-partition#traversed-property-notation">
    Learn how to project adjacent resource attributes directly into partition search.
  </Card>
</CardGroup>