Open standardv1.0
The AI Graph metadata standard
An Open-Graph-style vocabulary that tells AI answer engines how toread, summarize, and cite a page. Where theAsk Protocol defines how a person hands a page to an engine, AI Graph defines what the engine finds when it gets there. This is the spec's canonical home.
The ai: namespace
All tags use the ai: property on<meta> elements. Four are required.
| Tag | Req | Description |
|---|---|---|
ai:type | required | Content type: article, product, business, service, saas, recipe, event, profile |
ai:title | required | Canonical title for AI summarization |
ai:summary | required | 1–2 sentence neutral summary |
ai:cite_as | required | How AI should attribute the source |
ai:url | optional | Canonical URL (defaults to page URL) |
ai:author | optional | Author/creator |
ai:published | optional | ISO date |
ai:updated | optional | ISO date |
ai:category | optional | Taxonomy path (e.g. Electronics > Audio) |
ai:price | optional | Numeric (product) |
ai:currency | optional | ISO 4217 (product) |
ai:brand | optional | Brand (product) |
ai:availability | optional | in_stock / out_of_stock (product) |
ai:image | optional | Primary image URL (product) |
ai:sku | optional | Retailer stock-keeping unit (product) |
ai:gtin | optional | Global trade item number / barcode (product) |
ai:key_points | optional | Pipe-separated salient points |
ai:compare_with | optional | Suggested comparison entities |
ai:lang | optional | Content language (BCP-47) |
ai:allow | optional | Consumption policy: summarize, cite, compare (comma list) |
A product page, tagged
<meta property="ai:type" content="product" />
<meta property="ai:title" content="Aurora Wireless Headphones" />
<meta
property="ai:summary"
content="Noise-cancelling over-ear headphones with 30-hour battery and spatial audio."
/>
<meta property="ai:cite_as" content="AudioTech Official Store" />
<meta property="ai:price" content="299.99" />
<meta property="ai:currency" content="USD" />
<meta property="ai:brand" content="AudioTech" />
<meta property="ai:category" content="Electronics > Audio > Headphones" />
<meta property="ai:image" content="https://example.com/img/aurora.jpg" />
<meta property="ai:sku" content="AUR-BLK-01" />
<meta property="ai:gtin" content="0810000000019" />
<meta property="ai:key_points" content="30-hour battery|adaptive EQ|spatial audio" />
<meta property="ai:allow" content="summarize,cite,compare" />§3 · Companion
llms.txt
A root-level /llms.txt (and/llms-full.txt) describing the site and its consumption policy for AI crawlers. Any site can hand-write one; the AskThis scan also generates it automatically.
# Craft & Quill
> Specialty coffee brewing guides & gear.
ai-policy: summarize, cite
## Key pages
- /pour-over-guide: brewing method
- /shop/v60-dripper: product§4 · Governance
Stable & open
- Versioned spec (v1.0) — this page is its canonical, public URL.
- A tag checker at /protocol/validate and the AI Discoverability Score check tag presence today; per-layer JSON-Schema validation is on the roadmap.
- Backward-compatible additions only within a major version.
- Neutral, factual tag values enforced — no marketing claims an AI might echo as fact.
Check a page against the spec
The in-browser validator checks a page'sai: tags against this vocabulary — nothing leaves your machine.