# The State of Play

> A living index of AI adoption across industries, classified by maturity
> tier, evidenced by real-world adoption, and updated nightly. Data and
> text are CC BY 4.0 — reuse, including for training, with attribution.

## Start here
- [How It Works](/how-it-works): the research pipeline, stage by stage —
  evidence gathering, source scoring, the 14-day domain rotation, how a
  tier changes, this cycle's actual tier moves. Structured version:
  /how-it-works.json. Plain-text: /how-it-works.md
- [Methodology](/methodology): tier and trend definitions, license,
  provenance.
- Every domain and practice page below is server-rendered, real content —
  nothing hidden behind JavaScript. Every practice's full evidence list
  renders inline in its own page's HTML; a size guardrail exists only to
  cap a future runaway outlier, and its `.json`/`.md` siblings below are
  never capped either way, always carrying every evidence item.

## Domains and practices
- 19 domains (`/domain/<slug>`) and 338 practices (`/practice/<slug>`).
  Each page also publishes two machine-readable siblings: `.json`
  (structured, complete — every evidence item, not a capped preview) and
  `.md` (the same content as plain Markdown), e.g.
  `/practice/anomaly-and-outlier-detection.json` and `.md`. Both are
  linked from the page itself (`<link rel="alternate">`) and from the
  sitemap.
- Each page carries JSON-LD (`DefinedTerm`/`DefinedTermSet`/`Dataset`)
  describing the practice or domain it documents.

## Data
- [Sitemap](/sitemap.xml): every domain and practice page, with its JSON
  and Markdown siblings linked as alternates.
- License: CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/