NEXUS CONFORMANCE FRAMEWORK

A Machine-Readable Framework for Specification Conformance

NEXUS Conformance Framework defines a structured method for representing, evaluating and reporting whether an implementation, artifact, system or process satisfies the requirements of a specified technical object.

The framework separates:

SPECIFICATION

from

REQUIREMENTS

from

TESTS

from

IMPLEMENTATION

from

EVIDENCE

from

RESULT

from

CONFORMANCE CLAIM

This separation is fundamental to the NEXUS model.


1. PURPOSE

Technical specifications are useful only when their requirements can be understood, implemented and evaluated.

NEXUS Conformance Framework provides a common reference model for connecting:

The framework is intended to make conformance information:


2. CORE CONFORMANCE MODEL

The NEXUS conformance model is:

SPECIFICATION → REQUIREMENTS → TESTS → IMPLEMENTATION → EVIDENCE → RESULT → REPORT

Each stage has a distinct purpose.

A conformance claim SHOULD NOT be treated as equivalent to a successful test result.

A successful test result SHOULD NOT be treated as equivalent to universal compliance outside the tested scope.


3. SPECIFICATION

A specification defines the technical object against which an implementation or artifact may be evaluated.

A specification may be:

Each specification SHOULD have:

NEXUS records the specification.

NEXUS does not change the specification's original authority or status.


4. REQUIREMENTS

A specification may contain multiple requirements.

NEXUS may represent requirements individually when doing so improves traceability.

A requirement SHOULD have:

Example:

REQ-001

A requirement can then be connected to one or more tests.


5. NORMATIVE REQUIREMENTS

NEXUS distinguishes between:

NORMATIVE

and

INFORMATIVE

content.

Normative content defines requirements that must be satisfied for the relevant conformance target.

Informative content provides explanation, examples, background or guidance.

NEXUS SHOULD preserve the distinction established by the original specification.

NEXUS must not silently convert informative guidance into normative requirements.


6. TEST CASE

A test case defines a method for evaluating a requirement.

A test case SHOULD contain:

Example:

TEST-001

may evaluate:

REQ-001


7. TESTABILITY

Not every requirement can necessarily be tested automatically.

NEXUS therefore recognizes multiple evaluation methods:

AUTOMATED

The result can be generated by an automated test system.

MANUAL

A qualified evaluator must inspect or operate the implementation.

HYBRID

Automated and human evaluation are both required.

DOCUMENTARY

The requirement is evaluated through documented evidence.

INTEROPERABILITY

The requirement is evaluated through interaction between implementations.

NOT-YET-TESTABLE

A requirement has been identified but no accepted test method is currently recorded.


8. IMPLEMENTATION

An implementation is the object being evaluated.

Examples include:

An implementation SHOULD be identified by:


9. EVIDENCE

A conformance result SHOULD be supported by evidence.

Evidence may include:

Evidence SHOULD be linked to the requirement or test it supports.


10. RESULT MODEL

NEXUS uses explicit result states.

PASS

The evaluated requirement was satisfied under the recorded conditions.

FAIL

The evaluated requirement was not satisfied under the recorded conditions.

PARTIAL

Some but not all applicable conditions were satisfied.

NOT-APPLICABLE

The requirement does not apply to the evaluated implementation within the declared scope.

NOT-TESTED

No evaluation has been performed.

INCONCLUSIVE

Available evidence is insufficient to determine the result.

DISPUTED

A recorded result is subject to a documented dispute.


11. CONFORMANCE STATUS

A conformance report may produce one of the following overall statuses:

CONFORMANT

All applicable requirements within the declared scope have been evaluated and satisfied according to the defined evaluation method.

PARTIALLY-CONFORMANT

Some applicable requirements have been satisfied while others remain unsatisfied, unevaluated or inconclusive.

NON-CONFORMANT

One or more applicable requirements have been demonstrated not to be satisfied within the declared scope.

NOT-EVALUATED

No sufficient evaluation has been completed.

INCONCLUSIVE

Available evidence does not permit a reliable overall determination.

DISPUTED

The reported conformance status is subject to a documented dispute.


12. SCOPE

Every conformance result MUST have a defined scope.

Scope may include:

A conformance result without a declared scope SHOULD NOT be interpreted as universal.


13. VERSION BINDING

Conformance is always evaluated against a specific version or identifiable state of a specification whenever the specification is versioned.

Example:

Implementation A

may conform to:

Specification B v2.1

without necessarily conforming to:

Specification B v3.0

A change in the specification may therefore require a new evaluation.


14. TEST ENVIRONMENT

A conformance result SHOULD identify the environment in which testing occurred.

Relevant information may include:

This allows results to be reproduced or independently examined.


15. REPRODUCIBILITY

Where technically possible, a NEXUS conformance evaluation SHOULD provide sufficient information for another evaluator to reproduce the result.

A reproducibility record may contain:

Reproducibility strengthens a conformance claim but does not itself establish official certification.


16. INDEPENDENT REVIEW

NEXUS distinguishes between:

SELF-DECLARED

and

INDEPENDENTLY-REVIEWED

results.

SELF-DECLARED

The implementation owner or interested party performed or reported the evaluation.

INDEPENDENTLY-REVIEWED

A separate evaluator reviewed the evidence or evaluation process.

INDEPENDENTLY-REPRODUCED

A separate evaluator independently reproduced the relevant test result.

These states describe the evidence available to NEXUS.

They do not constitute governmental or institutional accreditation.


17. CONFORMANCE CLAIM

A conformance claim is a statement made by an entity that an implementation satisfies a defined specification within a declared scope.

A claim SHOULD identify:

Example:

Implementation A claims conformance to Specification B v2.1 within Scope S.

This is a claim.

It becomes a stronger technical assertion when supported by documented evidence and reproducible evaluation.


18. CONFORMANCE REPORT

A NEXUS Conformance Report SHOULD contain:

Identity

Target

Method

Results

Determination

Provenance


19. MACHINE-READABLE CONFORMANCE RECORD

A NEXUS conformance record MAY be represented as:

{

  "id": "NS:CONF:000001",

  "implementation": {

    "id": "NS:IMPL:EXAMPLE:1.0",

    "version": "1.0"

  },

  "specification": {

    "id": "NS:NEXUS:EXAMPLE:1.0",

    "version": "1.0"

  },

  "scope": "declared-test-scope",

  "evaluationMethod": "HYBRID",

  "result": "PASS",

  "status": "CONFORMANT",

  "evidence": [

    "NS:EVIDENCE:000001"

  ],

  "evaluationDate": "2026-09-01",

  "registry": "https://www.null-state.dev/conformance"

}


This is an illustrative NEXUS record structure.

The identifier NS:CONF:000001 identifies a NEXUS record and does not constitute an external certification number.


20. REQUIREMENT TRACEABILITY

NEXUS encourages requirement-level traceability.

The preferred chain is:

SPECIFICATION

↓

REQUIREMENT

↓

TEST

↓

IMPLEMENTATION

↓

EVIDENCE

↓

RESULT

↓

CONFORMANCE REPORT

This structure allows an evaluator to move from a high-level claim to the individual evidence supporting it.


21. FAILURE TRACEABILITY

A failed requirement SHOULD remain visible in the conformance record.

A failure may contain:

A later successful retest SHOULD NOT erase the historical failure.

Instead, the record should preserve the evaluation history.


22. EXCEPTIONS

An implementation may contain declared exceptions.

An exception SHOULD identify:

An exception does not automatically establish conformance.

The effect of an exception depends on the rules of the underlying specification.


23. CONDITIONAL CONFORMANCE

Some technical specifications may allow conditional requirements.

NEXUS may represent:

IF CONDITION → REQUIREMENT

The condition SHOULD be explicitly recorded.

This prevents a requirement from being incorrectly interpreted as universally applicable.


24. CONFORMANCE AND CERTIFICATION

Conformance and certification are not synonymous.

CONFORMANCE

describes satisfaction of requirements within a defined evaluation scope.

CERTIFICATION

generally involves an external certification process and an organization or legal/institutional framework authorized to issue such certification.

NEXUS does not automatically provide certification.

A NEXUS conformance record must not be represented as governmental certification, regulatory approval or third-party accreditation unless separate evidence establishes that status.


25. NEXUS CONFORMANCE CLASSES

NEXUS defines the following internal evidence classes:

C0 — UNASSESSED

No meaningful conformance evaluation is recorded.

C1 — SELF-DECLARED

A claimant has declared conformance.

C2 — EVIDENCED

The claim is accompanied by identifiable supporting evidence.

C3 — REVIEWED

The evidence or evaluation has undergone independent review.

C4 — REPRODUCED

An independent evaluator has reproduced the relevant evaluation.

C5 — INTEROPERABILITY-TESTED

The implementation has successfully completed a defined interoperability evaluation where applicable.

These classes describe the strength of the available NEXUS evidence.

They are not accreditation levels and do not replace the status system of the underlying specification.


26. NO AUTHORITY TRANSFER

A NEXUS conformance record does not transfer authority from the original specification publisher to NEXUS.

For example:

A NEXUS record about a W3C specification does not become a W3C certification.

A NEXUS record about an IETF specification does not become an IETF certification.

A NEXUS record about an ISO standard does not become an ISO certification.

NEXUS records technical relationships and evidence within its own independent framework.


27. CORRECTIONS

Conformance records SHOULD be correctable when reliable evidence demonstrates that a record contains:

Corrections SHOULD preserve the previous record state when technically feasible.


28. DISPUTES

A party may challenge a conformance record by presenting evidence.

A dispute SHOULD identify:

NEXUS may mark a record as:

DISPUTED

while the issue is reviewed.

A dispute does not automatically establish that either party is correct.


29. CONFORMANCE INTEGRITY PRINCIPLES

NEXUS Conformance Framework follows these principles:

1. TRACEABILITY

Every significant conclusion should be traceable to evidence.

2. SCOPE

Every result must have a declared scope.

3. VERSIONING

Results must identify the relevant versions.

4. REPRODUCIBILITY

Evaluation should be reproducible where technically feasible.

5. SEPARATION

Claims, evidence and determinations must remain distinguishable.

6. PROVENANCE

Sources and evaluators should be identifiable.

7. TRANSPARENCY

Material limitations should not be hidden.

8. INDEPENDENCE

Conflicts of interest should be disclosed.

9. CORRECTABILITY

Demonstrated errors should be correctable.

10. NON-DECEPTION

NEXUS records must not be represented as authority belonging to another organization.


30. RELATION TO THE NEXUS REGISTRY

The NEXUS Registry answers:

WHAT EXISTS?

The NEXUS Knowledge Graph answers:

HOW IS IT CONNECTED?

The NEXUS Conformance Framework answers:

DOES IT SATISFY THE REQUIREMENTS?

The NEXUS Trust Framework answers:

HOW STRONG IS THE EVIDENCE?

The NEXUS Evidence & Provenance Layer answers:

WHERE DID THE EVIDENCE COME FROM?

The NEXUS Governance Constitution answers:

HOW ARE THESE SYSTEMS GOVERNED?

Together these layers form the NEXUS reference infrastructure.


31. DESIGN PRINCIPLE

NEXUS does not treat a conformance claim as a fact merely because somebody has written the word "conformant."

Instead, NEXUS asks:

Conformant to what?

Which version?

Within what scope?

According to which requirements?

Tested how?

By whom?

Using which environment?

What evidence exists?

Can the result be reproduced?

Is the result disputed?

This is the foundation of machine-readable conformance.


32. FINAL PRINCIPLE

A NEXUS conformance record should make the following relationship explicit:

CLAIM → REQUIREMENT → TEST → EVIDENCE → RESULT

The stronger the traceability of this chain, the stronger the technical value of the conformance record.

NEXUS therefore treats conformance not as a badge, but as an evidence structure.


NEXUS CONFORMANCE FRAMEWORK

Specification

→ Requirements

→ Tests

→ Implementation

→ Evidence

→ Results

→ Report

→ Independent Review

→ Reproducible Record


Scope Statement

NEXUS Conformance Framework is an independent technical reference framework.

It does not replace the conformance, certification, accreditation, regulatory or standards processes of other organizations.

Its purpose is to provide a transparent, machine-readable structure for representing technical requirements, evaluation procedures, evidence and conformance results.

A claim is not evidence.

A test result is not universal authority.

A NEXUS record is not automatically certification.

The value of a conformance record comes from traceability, evidence, reproducibility and clearly defined scope.