Soigneur FHIR Implementation Guide
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Extension: Invariant snapshot hash this Frame Core was derived from

Official URL: https://fhir.soigneur.coach/fhir/StructureDefinition/cc-ext-derived-from-invariant-hash Version: 0.1.0
Draft as of 2026-09-08 Computable Name: CcExtDerivedFromInvariantHash

Copyright/Legal: Copyright (c) Soigneur. Licensed under CC0-1.0 (public domain dedication). FHIR(R) is the registered trademark of HL7 and is used with permission.

On the Frame Core Composition: the SHA-256 content hash of the invariant-class snapshot this Core was derived from — the deterministic materiality-diff anchor (ADR 0047). A live-class edit that bumps Patient.meta.lastUpdated without changing invariant content leaves this hash unchanged, so the lazy re-derive predicate collapses it to a no-op rather than re-running the expensive Opus derive.

Context of Use

    This extension may be used on the following element(s)

Usage info

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Extension
... extension 0..0 Extension
... url 1..1 uri "https://fhir.soigneur.coach/fhir/StructureDefinition/cc-ext-derived-from-invariant-hash"
... value[x] 1..1 string Value of extension

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Extension
... id 0..1 string Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "https://fhir.soigneur.coach/fhir/StructureDefinition/cc-ext-derived-from-invariant-hash"

doco Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type string: On the Frame Core Composition: the SHA-256 content hash of the invariant-class snapshot this Core was derived from — the deterministic materiality-diff anchor (ADR 0047). A live-class edit that bumps Patient.meta.lastUpdated without changing invariant content leaves this hash unchanged, so the lazy re-derive predicate collapses it to a no-op rather than re-running the expensive Opus derive.

Differential View

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Extension
... extension 0..0 Extension
... url 1..1 uri "https://fhir.soigneur.coach/fhir/StructureDefinition/cc-ext-derived-from-invariant-hash"
... value[x] 1..1 string Value of extension

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Extension
... id 0..1 string Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "https://fhir.soigneur.coach/fhir/StructureDefinition/cc-ext-derived-from-invariant-hash"

doco Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type string: On the Frame Core Composition: the SHA-256 content hash of the invariant-class snapshot this Core was derived from — the deterministic materiality-diff anchor (ADR 0047). A live-class edit that bumps Patient.meta.lastUpdated without changing invariant content leaves this hash unchanged, so the lazy re-derive predicate collapses it to a no-op rather than re-running the expensive Opus derive.

 

Other representations of profile: CSV, Excel, Schematron

Constraints

Id Grade Path(s) Description Expression