# Collections

Collections are abstract aggregates of artifacts/collections/data. To be able to make meaningful use of the system, they need to be assigned categories documenting their intended use case.

The Available collections section documents the existing categories and what you can expect from collections of each category. The allowed collection items, the structure of the metadata, and the supported lookups all depend on the category of the collection.

See the explanation for an overview, and below for technical details.

- Data models
  - Updating collections
- Collection items lookup
- Singleton collections
- Available collections
  - Category `debian:archive`
  - Category `debian:environments`
  - Category `debian:package-build-logs`
  - Category `debian:qa-results`
    - Common features across all QA results
    - Specification for `lintian`
    - Specification for `autopkgtest`
    - Specification for `piuparts`
    - Specification for `blhc`
    - Specification for `debdiff`
  - Category `debian:suite`
  - Category `debusine:task-configuration`
  - Category `debusine:task-history`
  - Category `debusine:workflow-internal`