# LUX Collections Discovery — Facets API

**Canonical:** https://apis.io/apis/yale/yale-facets-api/  
**Provider:** Yale University — https://apis.io/providers/yale/  
**Base URL:** https://lux.collections.yale.edu  
**Documentation:** https://lux.collections.yale.edu/

LUX Collections Discovery — Facets API is one of 13 APIs that [Yale University](https://apis.io/providers/yale/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Facets and Search. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

Faceted aggregation over LUX search results, returning an OrderedCollectionPage of facet values and occurrence counts. Institution-operated on lux.collections.yale.edu.

## Machine-readable artifacts (7)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/yale/refs/heads/main/openapi/yale-facets-api-openapi.yml
- **Documentation** — https://github.com/project-lux/lux-marklogic/blob/main/docs/lux-backend-api-usage.md
- **GitHub** — https://github.com/project-lux
- **SourceCode** — https://github.com/project-lux/lux-middletier
- **x-json-schema** — https://raw.githubusercontent.com/api-evangelist/yale/refs/heads/main/json-schema/yale-orderedcollectionpage-schema.json
- **x-vocabulary** — https://raw.githubusercontent.com/api-evangelist/yale/refs/heads/main/vocabulary/yale-vocabulary.yml
- **x-rules** — https://raw.githubusercontent.com/api-evangelist/yale/refs/heads/main/rules/yale-rules.yml

## Other Yale University APIs (12)

- [LUX Collections Discovery — Search API](https://apis.io/apis/yale/yale-search-api/)
- [LUX Collections Discovery — Documents API](https://apis.io/apis/yale/yale-documents-api/)
- [LUX Collections Discovery — Related API](https://apis.io/apis/yale/yale-related-api/)
- [LUX Collections Discovery — Configuration API](https://apis.io/apis/yale/yale-configuration-api/)
- [Yale Dataverse Repository API](https://apis.io/apis/yale/dataverse/)
- [Yale University Library Digital Collections IIIF](https://apis.io/apis/yale/iiif/)
- [Yale University Identity Federation Metadata](https://apis.io/apis/yale/identity-federation/)
- [Yale API Portal — Portal APIs](https://apis.io/apis/yale/portal/)
- [Yale Courses Web Service v3](https://apis.io/apis/yale/courses/)
- [Yale Enterprise (SOA) Services](https://apis.io/apis/yale/enterprise-soa/)
- [EliScholar OAI-PMH (bepress Digital Commons tenancy)](https://apis.io/apis/yale/elischolar/)
- [Yale Course Search and University Publications (CourseLeaf tenancy)](https://apis.io/apis/yale/course-catalog/)

## Tags

Facets, Search

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/yale/yale-facets-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/yale/.