FHIR Implementation Guides (HL7 FHIR package and IG publishers)

Where this market publishes its structure

• FHIR package registry catalog (packages2.fhir.org/packages/catalog, mirror of packages.fhir.org) + package.json manifests machine-readable, 1,374 packages; 915 non-HL7 manifests read, 397 publishers; 3 linked (aidbox, deep-6-ai, halaxy); 311 held; 35 domain candidates
• packages.fhir.org/catalog?name= (primary) machine-readable, 200 JSON but name / description / FHIR version only, and capped at a few dozen rows per query; packages2 mirror read for the full list with canonical URLs
• packages.fhir.org/ versions (+ packages2 dates) machine-readable, read for linked packages only
• Simplifier.net organisations (sitemap/organizations.xml + organisation pages) machine-readable, 45 organisations; 2 linked (philips, surescripts); Dedalus (dedalus.eu) unheld; Oracle Cerner / McKesson / PNT Italia name-only, no repo by that name
• Simplifier.net search (projects / packages / organisations) not machine-readable: robots.txt disallows /search; not read
• build.fhir.org/ig/qas.json machine-readable, 2,063 IG CI builds; GitHub owner is unverified as an organisation identity: report-only, never written

Own = declares at least one integration itself; covered = visible only because an aggregator, standards body, regulator or partner contract names it; distribution-only = listed only on cloud marketplaces it sells through, a channel reported beside, never counted as its own declared integrations; undeclared = nothing we can read, so no number; declares_compatibility = providers with a `compatible` shape vote, report only (kin, 2026-10-13): never counted as own, never in depth or position.

Taxonomy how this market maps onto apis.io

Derived 2026-10-23 from the 28 providers in this market we could resolve in the catalog. The percentage is the share of those providers carrying each one; it describes the market, not the tag or industry. Tag groups have no page of their own yet, so they are listed unlinked.

share of resolved cohort carrying it; tags >=0.20 & >=3 members (max 12, junk dropped), tag_groups >=0.20 (cooccurrence, non-cross-cutting; max 8), industries >=0.20 (max 6), areas >=0.10 (max 6; areas are keyword-matched and sparse), capabilities L1 >=0.20 (max 8); derive-market-taxonomy.py

Leaders by position (provisional)

Provisional: grouped by position, depth compared within a position only. Distribution (cloud marketplaces) and iPaaS bridges are counted beside position, never inside it. Unknown-builder listings are left out of position shares and counted here.

undeclared 28 · declares nothing we can read: no number