# hl7.fhir.uv.bulkdata 1.0.0 → 3.0.0 — version-difference evidence pack

Ships no StructureDefinitions in 1.0.0, so the whole requirement surface is OperationDefinition parameters — 23 parameter changes and no element rows at all.

This pack is the downloadable form of the public report at `/ig-gap/bulkdata-1-0-0-to-3-0-0`. It is per-pair and carries public content only; the cross-pair rollup and arbitrary-pair export remain a separate, gated capability (IG-115 / Suite B).

## Inputs

| Side | Package | sha256 |
|---|---|---|
| Baseline | `hl7.fhir.uv.bulkdata#1.0.0` | `bb023019ae7ba4f8d43a07f275ee33157fa62382dc4f18a99507a8f2b01c74d4` |
| Target | `hl7.fhir.uv.bulkdata#3.0.0` | `f1c76157b672a9ac9f4cc5875637bfc115dd9c4b75a550eb4d9cb17ca076b289` |

Engines: comparison 1.0.0 · normalization 1.3.0 · schema v2 · generator 1.1.0 · inputs hash `0d152adea100b3b5c8a2c2f0012f5102`

These two archives, identified by SHA-256, are the complete input. Anyone can fetch them and confirm they are looking at the same bytes this analysis read. The analysis itself is ImOnFHIR's.

There is deliberately no generation timestamp: the report is a pure function of the two archives, so the digests date it better than a clock would.

## The shape of the change

No element-level requirement changes. That is a fact about where this guide puts its requirements, not an absence of change — see the coverage and plane sections below; that is where this pair’s story lives.

### Read the element counts as a floor

4 profiles exist only in 3.0.0. Those have no counterpart to compare against, so they contribute no element-level rows — the element comparison covers the 0 profiles present in both versions. Neither number is a total on its own.

The 12 mandatory or must-support elements attributed to added profiles are counted from each profile’s effective element list; where a profile ships no snapshot that list is reconstructed by merging its differential onto its base, so treat the figure as indicative rather than audited.

## Where the change concentrates

Most breaking changes (absolute critical count):

- No matched profile carries a critical change.

Most sharply changed (critical share; profiles with at least 5 changes — the floor keeps one-change profiles from scoring 100%):

- No profile at or above the 5-change floor has a critical change.

## The other planes

| Plane | Changes | Highest severity present |
|---|---|---|
| Operations | 23 | needs review |
| Value sets | 2 | informational |
| Capability statements | 2 | informational |

## Profile coverage

Compared in both versions: 0 · added in target: 4 · removed from baseline: 0

- PROFILE_ADDED `http://hl7.org/fhir/uv/bulkdata/StructureDefinition/bulk-cohort-group`
- PROFILE_ADDED `http://hl7.org/fhir/uv/bulkdata/StructureDefinition/members-refreshed`
- PROFILE_ADDED `http://hl7.org/fhir/uv/bulkdata/StructureDefinition/member-filter`
- PROFILE_ADDED `http://hl7.org/fhir/uv/bulkdata/StructureDefinition/operation-not-supported`

## Sampled evidence rows

Every count above is complete. The rows below are a bounded, deterministic sample of 0, chosen so every kind of change and the most-affected profiles are each represented. Each row carries its stable change id — cite the id, not the prose; the id survives regeneration, the prose may not.

- No element-level rows exist for this pair; see the planes and coverage above.

## Who maintains this guide, per our register

Where standards work on this guide happens — the room a ballot comment or a question should go to. Quoted from our workgroup register; sourced from the guide's own published footer attribution.

- HL7 International / FHIR Infrastructure (owner) — https://www.hl7.org/Special/committees/fiwg · https://hl7.org/fhir/smart-app-launch/index.html — reviewed 2026-07-26

## What this pack is not

Not a compliance assessment. The comparison carries no deadline and renders no verdict about any organization or implementation. Observed validator differences are not automatic proof of official IG requirement changes.