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

# Collections

![Studio Collections page listing collections with document counts and enabled status](https://mintcdn.com/mixpeek/Wd_dr3_jo8gqgFxV/assets/studio/collections.png?fit=max\&auto=format\&n=Wd_dr3_jo8gqgFxV\&q=85\&s=42f19152e578aa4413754213b62bc194)

The Collections page — feature-extraction pipelines, each with its document count and enabled state.

[Collections](https://d8ts56gtwtyh1.cloudfront.net/docs/warehouse/collections.mp4)

Collections define how the warehouse decomposes raw files into queryable features.

### Build collections

* **Create**: Click New Collection, name it, provide a source (bucket or collection), and pick the [features](https://docs.mixpeek.com/docs/processing/features.md) you want (per your content's modality). API: [Create Collection](https://docs.mixpeek.com/docs/api-reference/collections/create-collection.md).
* **Features**: Studio shows available feature addresses and vector indexes. Use this to configure retrievers. API: [Describe Features](https://docs.mixpeek.com/docs/api-reference/collections/describe-collection-features.md).
* **Update**: Modify description, enablement, and taxonomy applications. API: [Update Collection](https://docs.mixpeek.com/docs/api-reference/collections/update-collection.md).
* **List/Get/Delete**: Browse, inspect, or remove collections. API: [List](https://docs.mixpeek.com/docs/api-reference/collections/list-collections.md), [Get](https://docs.mixpeek.com/docs/api-reference/collections/get-collection.md), [Delete](https://docs.mixpeek.com/docs/api-reference/collections/delete-collection.md).

### Documents

* View documents produced by extraction with metadata and vectors.
* Create or update documents directly for advanced workflows. API: [Create](https://docs.mixpeek.com/docs/api-reference/collection-documents/create-a-document.md), [Update](https://docs.mixpeek.com/docs/api-reference/collection-documents/update-document.md), [Get](https://docs.mixpeek.com/docs/api-reference/collection-documents/get-a-document-by-id.md), [List](https://docs.mixpeek.com/docs/api-reference/collection-documents/list-documents.md), [Delete](https://docs.mixpeek.com/docs/api-reference/collection-documents/delete-a-document-by-id.md).

### Tips

* Collections are the searchable view of your data; choose features that match your modalities.
* Ensure `internal_id` and `X-Namespace` context is correct—Studio handles this automatically.

**1. Create a collection**

Select a source, pick features, and save. Studio bootstraps vector indexes as needed.

**2. Inspect features**

Use Describe Features to confirm vector names, dimensions, and index metadata for retriever setup.

**3. Attach taxonomies (optional)**

Configure on-demand or materialized applications from the collection page.

**4. Attach retriever enrichments (optional)**

Configure retriever enrichments to run retriever pipelines on documents during post-processing. Each enrichment maps document fields to retriever inputs, executes the retriever, and writes selected result fields back to the document. Use for LLM classification, cross-collection joins, or multi-stage enrichment at ingestion time.

Documents are stored as MVS records with payload and vectors; the record ID is the document\_id in results.


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