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

# Schema

## Schema

Collection schema for configuring indexes and encryption.

The schema controls how data is indexed and can optionally specify
customer-managed encryption keys (CMEK) for data at rest.

<span class="text-sm">Properties</span>

<ParamField path="defaults" type="ValueTypes" />

<ParamField path="keys" type="Record<string, ValueTypes>" />

<ParamField path="cmek" type="Cmek | null" />

***

## Index configs

### FtsIndexConfig

<span class="text-sm">Properties</span>

<ParamField path="type" type="FtsIndexConfig" />

### StringInvertedIndexConfig

<span class="text-sm">Properties</span>

<ParamField path="type" type="StringInvertedIndexConfig" />

### IntInvertedIndexConfig

<span class="text-sm">Properties</span>

<ParamField path="type" type="IntInvertedIndexConfig" />

### FloatInvertedIndexConfig

<span class="text-sm">Properties</span>

<ParamField path="type" type="FloatInvertedIndexConfig" />

### BoolInvertedIndexConfig

<span class="text-sm">Properties</span>

<ParamField path="type" type="BoolInvertedIndexConfig" />

### VectorIndexConfig

<span class="text-sm">Properties</span>

<ParamField path="type" type="VectorIndexConfig" />

<ParamField path="space" type="Space | null" />

<ParamField path="embeddingFunction" type="EmbeddingFunction | null | undefined" />

<ParamField path="sourceKey" type="string | null" />

<ParamField path="hnsw" type="HnswIndexConfig | null" />

<ParamField path="spann" type="SpannIndexConfig | null" />

### SparseVectorIndexConfig

<span class="text-sm">Properties</span>

<ParamField path="type" type="SparseVectorIndexConfig" />

<ParamField path="embeddingFunction" type="SparseEmbeddingFunction | null | undefined" />

<ParamField path="sourceKey" type="string | null" />

<ParamField path="bm25" type="boolean | null" />