sameAs Property
sameAs is the Schema.org property that declares URLs that identify the same entity across the web. Used on Organization and Person schema to link to authoritative external profiles: LinkedIn, GitHub, Wikidata, Google Knowledge Graph entity, Crunchbase, ORCID, social media verified accounts. The sameAs chain is the canonical entity-resolution backbone for E-E-A-T and Knowledge Graph linkage.
Also called: sameAs, Schema.org sameAs · Last updated: May 27, 2026 · By Joseph W. Anady
Why it matters.
sameAs is structurally trivial (a list of URLs) but practically critical. Each sameAs entry is an independent verification that 'the entity described here is the same as the entity at that URL.' A 10-entry sameAs chain with LinkedIn + GitHub + Wikidata + ORCID + Crunchbase + Google KG MID gives Google high confidence about who you are. A 0-entry schema describes an unverifiable entity that AI engines struggle to disambiguate.
How it works.
sameAs lives as a property on Organization or Person schema in JSON-LD. Value is an array of URLs (absolute https://). Each URL should be a page that genuinely identifies the same entity (your verified LinkedIn, your real GitHub, your Wikidata QID page, your ORCID profile, etc.). The chain strengthens the Author Vector (for Person) and Knowledge Graph link (for Organization).
2026 reality check.
sameAs chain density is now a measurable AI citation signal. Claude cites content at 94 percent confidence when author Person schema has sameAs to verifiable external profiles vs 61 percent for plain text. ChatGPT favors authority domains in citations, and authority is partly assessed via sameAs chain density. The 5-entry minimum is the practitioner consensus floor; 10-25 entries is the safe band for AI search visibility.
Data points
- Schema.org sameAs documented at https://schema.org/sameAs
- Practitioner consensus floor: 5 sameAs minimum for credibility
- Safe band: 10-25 sameAs for AI search visibility
- Claude cites Person-attributed content at 94% vs 61% plain (Oltre.ai 2026)
- TDG Joseph Person schema: 25 sameAs URLs across identity, professional, content, software, academic, veteran, federal, maps, brand-sister sites
First-hand insight from ThatDeveloperGuy.
ThatDeveloperGuy's Person schema for Joseph W. Anady at /authors/joseph/ contains 25 sameAs URLs spanning identity anchors (Wikidata Q139901957, ORCID 0009-0008-8625-949X), professional networks (LinkedIn, GitHub, Crunchbase), content platforms (dev.to, Hashnode, Medium), software platforms (StackShare, AlternativeTo), academic platforms (Google Scholar, ResearchGate), veteran identity proof (DVIDS records), federal verification (SAM.gov entity page), maps (Google Business Profile), and sister-brand sites. This is among the strongest sameAs chains in the small-business web dev space.
How TDG approaches it
TDG's sameAs strategy: 25+ verified URLs on Joseph's Person schema, 14+ on TDG's Organization schema, replicated identically across all pages via @id reference. Includes the canonical anchors (Wikidata, ORCID, Google KG MID), professional networks, content platforms, and federal verification sources. Reviewed quarterly to remove dead URLs and add new verified profiles.
Common mistakes.
- Empty or single-entry sameAs (signals an unverifiable entity)
- URLs that don't actually identify the same entity (e.g., linking to someone else's LinkedIn)
- Inconsistent sameAs across different pages (breaks Author Vector continuity)
- Missing the most authoritative anchors (Wikidata QID, Google KG MID, ORCID)
- Using non-HTTPS URLs (some validators flag these)
FAQ.
How many sameAs entries should I have?
Minimum 5 for credibility. 10-25 is the safe band for AI search visibility. More is better up to the point where each entry is a genuine independent verification.
Should I link to social media profiles in sameAs?
Yes for verified accounts (LinkedIn personal/company, GitHub, X/Twitter, etc.). Skip unverified or pseudonymous accounts.
Can I include my own other websites in sameAs?
Yes — sister brand sites you own and operate are valid sameAs entries. TDG includes thatdeveloperguy.com, thatdevpro.com, thataiguy.org, thatwebhostingguy.com, freeaicharity.org in the Organization sameAs.
What's the difference between sameAs and identifier?
sameAs is a list of URLs. identifier is structured PropertyValue declarations (like Wikidata QID = Q139901957). Both reinforce entity identity — use both.
Does sameAs help with Knowledge Panel eligibility?
Yes substantially. Knowledge Panel display requires Knowledge Graph entity presence, and KG presence is largely driven by external authority signals — sameAs chain density correlates directly with KG entity strength.
Maintained by Joseph W. Anady at ThatDeveloperGuy. Back to glossary · Suggest a term