ISO Measurement Standards Ontology

# ISO Measurement Standards Ontology — Flow Algebra

URL: https://kirethresearch.org/booksai-core/ontologies/mathematical-ontologies/measurement-units-ontologies/international-standards/iso-measurement-standards-ontology.html

FLOW ISOMeasurementStandardsOntology {

  DOMAIN:
    Mathematical Ontologies
    -> Measurement & Units Ontologies
    -> International Standards
    -> ISO Measurement Standards Ontology

  PURPOSE:
    Represent the ISO measurement standards framework as a structured semantic system connecting measurement terminology, quantities and units, measurement management, calibration, laboratory competence, reference materials, uncertainty, measurement methods, equipment, validation, verification, conformity assessment, quality assurance and interoperable measurement records. The ontology models ISO and joint ISO/IEC document families, identifiers, parts, editions, clauses, normative references, scope, requirements, guidance, adoption, supersession, implementation evidence, machine-readable mappings, provenance and version-aware reasoning while preserving distinctions between ISO standards, SI definitions, JCGM metrology guides, IEC standards, accreditation requirements, regulations, laws and organisation-specific procedures.

  ENTITY ISOMeasurementStandards {
    TYPE: InternationalMeasurementStandardsFramework

    PROPERTIES:
      has_ISO_documents
      may_have_joint_ISO_IEC_documents
      has_measurement_scope
      has_quantity_and_unit_semantics
      has_measurement_management_semantics
      has_laboratory_semantics
      has_reference_material_semantics
      has_versioning
      has_normative_structure
      has_provenance
  }

  ENTITY ISOStandardDocument {
    TYPE: ControlledStandardsDocument

    COMPONENTS:
      document_identifier
      title
      part
      edition
      publication_date
      status
      scope
      clauses
      annexes
      normative_references
      informative_references
      amendments
      corrigenda
  }

  ENTITY ISORequirement {
    TYPE: NormativeProvision

    COMPONENTS:
      standard_identifier
      clause_identifier
      requirement_text_reference
      applicability
      evidence
      status
  }

  ISO_ORGANISATION_MODEL {
    organisation:
      International_Organization_for_Standardization

    role:
      development_and_publication_of_international_standards

    RULE:
      ISO_role MUST be distinguished_from_BIPM_SI_governance_and_national_regulation
  }

  DOCUMENT_IDENTIFIER_MODEL {
    forms:
      ISO_number
      ISO_part_number
      ISO_IEC_joint_number
      edition_or_year_designator

    RULE:
      document_family_identifier_and_specific_edition SHOULD be distinguished
  }

  PART_MODEL {
    multipart_standard:
      family
      part_number
      part_title

    RULE:
      requirements_from_one_part MUST not_be attributed_to_another_part_without_reference
  }

  EDITION_MODEL {
    fields:
      edition_number
      publication_year
      amendment
      corrigendum
      revision_status

    RULE:
      edition_context MUST be preserved_when_requirements_change
  }

  STATUS_MODEL {
    possible:
      published
      current
      amended
      superseded
      withdrawn
      draft
      historical

    RULE:
      current_applicability SHOULD be verified_before_compliance_claim
  }

  SCOPE_MODEL {
    standard:
      defined_subject_and_application_boundary

    RULE:
      requirement MUST remain_within_document_scope
  }

  CLAUSE_MODEL {
    hierarchy:
      clause
      subclause
      paragraph
      list
      annex

    RULE:
      machine_mapping SHOULD retain_precise_clause_reference_when_available
  }

  NORMATIVE_CONTENT_MODEL {
    content:
      requirements_and_provisions_needed_for_application

    RULE:
      normative_content MUST be distinguished_from_informative_explanation
  }

  INFORMATIVE_CONTENT_MODEL {
    content:
      notes_examples_guidance_or_informative_annexes

    RULE:
      informative_content MUST not_be promoted_to_requirement_without_external_basis
  }

  REQUIREMENT_LANGUAGE_MODEL {
    terms:
      shall
      should
      may
      can

    RULE:
      interpretation SHOULD follow_applicable_ISO_IEC_Directives_and_document_context
  }

  NORMATIVE_REFERENCE_MODEL {
    referenced_document:
      necessary_for_application_of_referencing_document

    RULE:
      dated_vs_undated_reference_semantics MUST be preserved
  }

  DATED_REFERENCE_MODEL {
    reference:
      specific_edition

    RULE:
      later_revision_does_not_automatically_replace_dated_reference
  }

  UNDATED_REFERENCE_MODEL {
    reference:
      document_family_without_specific_edition

    RULE:
      applicable_revision_depends_on_referencing_standard_rules
  }

  ISO_IEC_80000_MODEL {
    domain:
      quantities_and_units

    semantic_role:
      quantity_names
      symbols
      definitions
      equations
      units

    RULE:
      exact_part_and_edition MUST be identified_for_domain_specific_semantics
  }

  QUANTITY_MODEL {
    quantity:
      property_of_phenomenon_body_or_substance
      where_property_has_magnitude_expressible_as_number_and_reference
      under_metrological_context

    RULE:
      terminology_source_and_version SHOULD be preserved
  }

  QUANTITY_KIND_MODEL {
    role:
      groups_mutually_comparable_quantities

    RULE:
      quantity_kind != dimension
  }

  UNIT_MODEL {
    measurement_unit:
      real_scalar_quantity_defined_and_adopted_by_convention
      with_which_other_quantities_of_same_kind_are_compared

    RULE:
      unit != quantity
  }

  DIMENSION_MODEL {
    dimension:
-
      expression_of_dependence_of_quantity_on_base_quantities

    RULE:
      same_dimension_does_not_imply_same_quantity_kind
  }

  SYMBOL_MODEL {
    quantity_symbol:
      identifies_quantity_or_quantity_kind_in_context

    unit_symbol:
      identifies_unit

    RULE:
      quantity_and_unit_symbol_typography SHOULD be distinguished
  }

  SI_ALIGNMENT_MODEL {
    ISO_quantity_unit_framework:
      aligned_with_International_System_of_Units

    RULE:
      ISO_document_does_not_replace_authoritative_SI_definition
  }

  ISO_10012_MODEL {
    domain:
      measurement_management_systems

    purpose:
      support_quality_of_measurement_processes_and_measuring_equipment

    concepts:
      measurement_management
      metrological_confirmation
      measurement_process
      measuring_equipment
      metrological_requirements

    RULE:
      measurement_management_system != calibration_event
  }

  MEASUREMENT_MANAGEMENT_MODEL {
    system:
      policies_processes_resources_and_controls_for_measurement

    objectives:
      ensure_measurement_requirements_are_met
      control_measurement_risk
      maintain_equipment_suitability

    RULE:
      organisational_system_context MUST be distinguished_from_individual_result
  }

  METROLOGICAL_CONFIRMATION_MODEL {
    process:
      ensure_measuring_equipment_conforms_to_requirements_for_intended_use

    may_include:
      calibration
      verification
      adjustment_or_repair
      labelling_or_status_control

    RULE:
      metrological_confirmation != calibration_alone
  }

  MEASURING_EQUIPMENT_MODEL {
    possible:
      measuring_instrument
      software
      measurement_standard
      reference_material
      auxiliary_apparatus

    RULE:
      equipment_scope MAY extend_beyond_single_instrument
  }

  MEASUREMENT_PROCESS_MODEL {
    inputs:
      measurand
      method
      equipment
      operator
      environment
      reference

    output:
      measurement_result

    RULE:
      process_controls SHOULD match_metrological_requirements
  }

  METROLOGICAL_REQUIREMENT_MODEL {
    possible:
      range
      resolution
      uncertainty
      maximum_permissible_error
      stability
      environmental_conditions

    RULE:
      requirement MUST be linked_to_intended_use
  }

  ISO_IEC_17025_MODEL {
    domain:
      competence_of_testing_and_calibration_laboratories

    principles:
      competence
      impartiality
      consistent_operation

    measurement_related:
      methods
      equipment
      metrological_traceability
      sampling
      handling
      technical_records
      measurement_uncertainty
      validity_of_results
      reporting

    RULE:
      exact_clause_mapping MUST be version_specific
  }

  LABORATORY_COMPETENCE_MODEL {
    competence:
      ability_to_apply_knowledge_skills_resources_and_methods_with_valid_results

    RULE:
      competence_is_scope_specific
  }

  IMPARTIALITY_MODEL {
    laboratory:
      identifies_and_manages_risks_to_impartiality

    RULE:
      impartiality != statistical_independence
  }

  METHOD_SELECTION_MODEL {
    method:
      appropriate_for_customer_and_measurement_requirements

    possible:
      standard_method
      nonstandard_method
      laboratory_developed_method

    RULE:
      method_source_version_and_scope MUST be preserved
  }

  METHOD_VERIFICATION_MODEL {
    purpose:
      demonstrate_laboratory_can_properly_perform_method_before_use

    RULE:
      verification != validation
  }

  METHOD_VALIDATION_MODEL {
    purpose:
      demonstrate_method_fitness_for_intended_use

    possible_characteristics:
      range
      accuracy_related_performance
      uncertainty
      detection_limit
      selectivity
      linearity
      repeatability
      reproducibility
      robustness

    RULE:
      validation_extent_depends_on_method_and_intended_use
  }

  SAMPLING_MODEL {
    process:
      selection_of_sample_for_testing_or_calibration_context

    RULE:
      sampling_plan_method_and_records SHOULD be preserved
  }

  EQUIPMENT_MODEL {
    requirements:
      suitability
      identification
      calibration_or_verification
      maintenance
      protection
      records
      status

    RULE:
      equipment_state_at_measurement_time MUST be recoverable
  }

  CALIBRATION_MODEL {
    role:
      establish_relation_between_reference_values_and_indications

    RULE:
      calibration != adjustment
      and_calibration != metrological_confirmation_in_full
  }

  METROLOGICAL_TRACEABILITY_MODEL {
    result:
      related_to_reference_through_documented_unbroken_chain_of_calibrations
      each_contributing_to_uncertainty

    RULE:
      traceability_claim MUST include_scope_and_reference
  }

  REFERENCE_STANDARD_MODEL {
    standard:
      used_as_reference_for_calibration_or_measurement

    RULE:
      standard_status_uncertainty_and_traceability MUST be valid
  }

  REFERENCE_MATERIAL_MODEL {
    material:
      sufficiently_homogeneous_and_stable_for_declared_properties

    RULE:
      intended_use_and_property_value_context MUST be preserved
  }

  ISO_17034_MODEL {
    domain:
      competence_of_reference_material_producers

    concepts:
      production
      homogeneity
      stability
      characterisation
      assigned_values
      uncertainty
      traceability
      certificates

    RULE:
      reference_material_producer_scope MUST be identified
  }

  CERTIFIED_REFERENCE_MATERIAL_MODEL {
    certificate:
      specified_property_value
      uncertainty
      metrological_traceability
      intended_use

    RULE:
      certificate_and_material_batch_identity MUST remain_linked
  }

  HOMOGENEITY_MODEL {
    reference_material:
      between_unit_and_within_unit_variation

    RULE:
      homogeneity_evidence contributes_to_assigned_value_validity
  }

  STABILITY_MODEL {
    reference_material_or_equipment:
      change_over_time

    RULE:
      stability_monitoring_timescale_and_conditions MUST be declared
  }

  ISO_IEC_17043_MODEL {
    domain:
      proficiency_testing_provider_competence_and_proficiency_testing_schemes

    RULE:
      proficiency_testing != calibration
  }

  PROFICIENCY_TESTING_MODEL {
    participants:
      laboratories_or_measurement_entities

    assigned_value:
      reference_for_performance_evaluation

    statistics:
      may_include_z_scores_or_other_metrics

    RULE:
      performance_metric_definition_and_assigned_value_uncertainty MUST be preserved
  }

  INTERLABORATORY_COMPARISON_MODEL {
    measurements:
      performed_by_multiple_laboratories

    purposes:
      proficiency
      method_comparison
      reference_assignment
      equivalence

    RULE:
      purpose determines_statistical_interpretation
  }

  VALIDITY_OF_RESULTS_MODEL {
    laboratory:
      monitors_validity_of_measurement_results

    possible:
      reference_materials
      replicate_tests
      control_charts
      proficiency_testing
      interlaboratory_comparison
      retesting
      correlation_of_results

    RULE:
      monitoring_plan SHOULD be risk_and_method_appropriate
  }

  UNCERTAINTY_MODEL {
    measurement_result:
      associated_measurement_uncertainty

    RULE:
      uncertainty_evaluation_method MUST match_measurement_model_and_scope
  }

  GUM_ALIGNMENT_MODEL {
    uncertainty:
      may_use_JCGM_GUM_framework

    RULE:
      GUM_is_JCGM_guidance_not_an_ISO_standard_identity_in_itself
  }

  TYPE_A_MODEL {
    evaluation:
      statistical_analysis_of_series_of_observations

    RULE:
      Type_A != random_error
  }

  TYPE_B_MODEL {
    evaluation:
      information_other_than_statistical_analysis_of_current_series

    RULE:
      Type_B != systematic_error
  }

  COVARIANCE_MODEL {
    dependencies:
      shared_standards
      shared_environment
      shared_calibration
      common_processing

    RULE:
      covariance MUST be included_when_material
  }

  REPORTING_MODEL {
    report:
      result
      unit
      uncertainty_when_required
      method
      identification
      conditions
      statements
      authorisation

    RULE:
      report_content_depends_on_standard_scope_and_customer_or_regulatory_requirements
  }

  CALIBRATION_CERTIFICATE_MODEL {
    possible_fields:
      calibrated_item
      results
      units
      uncertainties
      conditions
      traceability
      method
      dates
      authorisation

    RULE:
      certificate_data MUST be linked_to_item_and_calibration_state
  }

  TEST_REPORT_MODEL {
    result:
      test_outcome_and_supporting_measurement_information

    RULE:
      test_result_and_calibration_result_have_different_semantics
  }

  DECISION_RULE_MODEL {
    conformity_statement:
      requires_rule_describing_how_uncertainty_is_accounted_for_when_relevant

    RULE:
      decision_rule MUST be agreed_or_defined_before_statement
  }

  CONFORMITY_MODEL {
    specified_requirement:
      limit_or_tolerance

    measurement_result:
      value_plus_uncertainty_context

    RULE:
      conformity_statement != raw_measurement_result
  }

  GUARD_BAND_MODEL {
    acceptance_region:
      adjusted_relative_to_specification_limit

    RULE:
      guard_band_is_decision_policy_not_measurement_correction
  }

  RISK_MODEL {
    possible:
      false_acceptance
      false_rejection

    RULE:
      probability_model_and_decision_context MUST be declared
  }

  QUALITY_CONTROL_MODEL {
    activities:
      reference_checks
      control_samples
      replicates
      trend_monitoring
      comparisons

    RULE:
      quality_control_evidence supports_but_does_not_replace_method_validation
  }

  CONTROL_CHART_MODEL {
    measurements:
      time_ordered

    limits:
      statistically_or_operationally_defined

    RULE:
      control_limits != specification_limits
  }

  NONCONFORMING_WORK_MODEL {
    condition:
      laboratory_activity_or_result_does_not_conform_to_requirements

    actions:
      evaluate_significance
      control_work
      notify_when_needed
      correct
      retain_records

    RULE:
      exact_actions_depend_on_applicable_standard_and_quality_system
  }

  CORRECTIVE_ACTION_MODEL {
    trigger:
      nonconformity_or_recurring_issue

    process:
      analyse_cause
      implement_action
      evaluate_effectiveness

    RULE:
      correction_and_corrective_action_are_distinct
  }

  TECHNICAL_RECORD_MODEL {
    records:
      observations
      calculations
      personnel
      equipment
      conditions
      methods
      dates
      amendments

    RULE:
      record_changes SHOULD preserve_original_information_and_auditability
  }

  DATA_INTEGRITY_MODEL {
    concerns:
      access
      alteration
      calculation
      transfer
      storage
      backup

    RULE:
      integrity_controls support_validity_but_do_not_define_metrological_accuracy
  }

  SOFTWARE_MODEL {
    systems:
      calculation
      acquisition
      laboratory_information_management
      calibration
      reporting

    RULE:
      software_suitability_and_changes MAY require_validation
  }

  ISO_5725_MODEL {
    domain:
      accuracy_trueness_and_precision_of_measurement_methods_and_results

    concepts:
      trueness
      precision
      repeatability
      reproducibility
      bias

    RULE:
      exact_part_and_edition MUST be identified
  }

  TRUENESS_MODEL {
    concept:
      closeness_of_agreement_between_average_of_many_results_and_reference_value

    RULE:
      trueness != precision
  }

  PRECISION_MODEL {
    concept:
      closeness_of_agreement_between_independent_results_under_specified_conditions

    RULE:
      conditions MUST be specified
  }

  REPEATABILITY_MODEL {
    conditions:
      repeatability_conditions

    statistic:
      repeatability_standard_deviation_or_related_metric
  }

  REPRODUCIBILITY_MODEL {
    conditions:
      reproducibility_conditions

    RULE:
      changed_factors MUST be declared
  }

  BIAS_MODEL {
    estimate:
      mean_result-reference_value

    RULE:
      reference_uncertainty MUST be considered
  }

  ISO_21748_MODEL {
    domain:
      use_of_repeatability_reproducibility_and_trueness_estimates_in_measurement_uncertainty_evaluation

    RULE:
      applicability_requires_appropriate_method_performance_data
  }

  ISO_13528_MODEL {
    domain:
      statistical_methods_for_proficiency_testing_by_interlaboratory_comparison

    RULE:
      assigned_value_dispersion_and_performance_statistic_method MUST be identified
  }

  ISO_15189_RELATION_MODEL {
    domain:
      medical_laboratories

    RULE:
      domain_specific_laboratory_standard_semantics SHOULD remain_separate_from_general_ISO_IEC_17025_context
  }

  MEASUREMENT_MANAGEMENT_RISK_MODEL {
    risk:
      incorrect_measurement_result
      unsuitable_equipment
      uncontrolled_process

    RULE:
      controls_should_be proportional_to_measurement_risk
  }

  METROLOGICAL_CONFIRMATION_STATUS_MODEL {
    possible:
      confirmed
      restricted
      overdue
      out_of_service
      under_review

    RULE:
      status MUST be visible_to_users_of_equipment
  }

  CALIBRATION_INTERVAL_MODEL {
    factors:
      stability
      use
      environment
      required_uncertainty
      history
      risk

    RULE:
      fixed_interval_is_not_universal_requirement_for_all_equipment
  }

  ENVIRONMENT_MODEL {
    possible:
      temperature
      humidity
      vibration
      contamination
      electromagnetic_conditions

    RULE:
      conditions affecting_validity_of_results MUST be monitored_or_controlled
  }

  PERSONNEL_MODEL {
    competence:
      education
      qualification
      training
      technical_knowledge
      experience

    RULE:
      authorisation_scope SHOULD be defined
  }

  EXTERNAL_PROVIDER_MODEL {
    supplied:
      calibration
      reference_material
      proficiency_testing
      equipment_service

    RULE:
      externally_provided_products_and_services SHOULD meet_declared_requirements
  }

  CUSTOMER_REQUIREMENT_MODEL {
    request:
      method
      range
      uncertainty
      reporting
      conformity_statement

    RULE:
      requirements SHOULD be reviewed_before_work
  }

  COMPLAINT_MODEL {
    complaint:
-
      expression_of_dissatisfaction_related_to_laboratory_activity

    RULE:
      complaint_process_is_quality_system_semantics_not_measurement_equation
  }

  AUDIT_MODEL {
    evidence:
      records
      implementation
      competence
      conformity

    RULE:
      audit_finding != measurement_error
  }

  ACCREDITATION_MODEL {
    assessment:
      against_specific_standard_and_scope

    RULE:
      accreditation_is_external_attestation_of_competence
      not_ISO_itself
  }

  ACCREDITATION_SCOPE_MODEL {
    fields:
      measurand_or_test
      method
      range
      uncertainty_or_capability
      location

    RULE:
      accredited_status MUST not_be_generalised_beyond_scope
  }

  REGULATION_DISTINCTION_MODEL {
    ISO_standard:
      voluntary_or_contractually_adopted_standard_in_general

    regulation:
      legally_binding_rule

    RULE:
      ISO_standard_does_not_automatically_have_legal_force
  }

  CONTRACT_MODEL {
    contract:
      may_require_specific_ISO_standard_and_edition

    RULE:
      contractual_obligation_is_external_to_standard_document
  }

  NATIONAL_ADOPTION_MODEL {
    ISO_standard:
      may_be adopted_by_national_standards_body

    metadata:
      national_identifier
      modifications
      adoption_date

    RULE:
      adoption_context MUST be preserved
  }

  HARMONISED_STANDARD_MODEL {
    context:
      may_support_regulatory_presumption_or_market_framework_in_specific_jurisdiction

    RULE:
      legal_effect MUST be determined_from_jurisdiction_not_inferred_from_ISO_status
  }

  SUPERSESSION_MODEL {
    old_edition:
      replaced_by_new_edition

    RULE:
      historical_records MUST retain_old_edition_context
  }

  CHANGE_IMPACT_MODEL {
    revision:
      changed_clause_or_requirement

    evaluate:
      methods
      procedures
      equipment
      software
      reports
      training

    RULE:
      standard_revision SHOULD trigger_impact_assessment
  }

  IMPLEMENTATION_MODEL {
    standard_requirement:
      mapped_to
        policy
        procedure
        record
        technical_control
        evidence

    RULE:
      implementation_mapping MUST preserve_clause_and_version
  }

  COMPLIANCE_EVIDENCE_MODEL {
    evidence:
      document
      record
      observation
      test
      audit
      calculation

    RULE:
      evidence_validity_and_date MUST be preserved
  }

  MACHINE_MAPPING_MODEL {
    standard_clause:
      ontology_entity
      rule
      evidence_type
      status

    RULE:
      semantic_mapping MUST not_reproduce_or_replace_authoritative_standard_text
  }

  COPYRIGHT_AWARE_MODEL {
    ISO_document:
      controlled_copyright_material

    ontology:
      stores_original_semantic_abstraction_identifiers_and_mappings

    RULE:
      authoritative_text_should_be consulted_under_appropriate_access_rights
  }

  VERSION_RESOLUTION_MODEL {
    inputs:
      document_family
      edition
      amendment
      date
      adoption_context

    output:
      applicable_standard_state

    RULE:
      current_latest_version_is_not_always_applicable_to_historical_or_contractual_work
  }

  CROSS_STANDARD_MODEL {
    ISO_document:
      may_reference
        IEC
        JCGM
        BIPM
        OIML
        other_ISO
        national_or_sector_documents

    RULE:
      issuing_body_and_normative_status MUST be preserved
  }

  TERMINOLOGY_ALIGNMENT_MODEL {
    metrology_terms:
      may_align_with_VIM

    quantities_units:
      may_align_with_ISO_IEC_80000_and_SI

    RULE:
      exact_source_version MUST be preserved
  }

  INTEROPERABILITY_MODEL {
    shared:
      quantity_kind
      unit
      uncertainty
      method
      traceability
      standard_identifier

    RULE:
      semantic_interoperability_requires_more_than_matching_field_names
  }

  DIGITAL_RECORD_MODEL {
    fields:
      measurement_identifier
      value
      unit
      uncertainty
      method
      equipment
      calibration
      traceability
      operator
      environment
      standard_context
      timestamp

    RULE:
      digital_record SHOULD be auditably linked_to_source_and_processing
  }

  METADATA_MODEL {
    fields:
      ISO_document_identifier
      title
      part
      edition
      publication_date
      status
      scope
      clause
      normative_status
      referenced_documents
      measurement_domain
      implementation_mapping
      adoption_context
      supersession
      evidence
      provenance

    RULE:
      metadata MUST support_version_specific_ISO_semantic_resolution
  }

  RELATIONSHIPS {
    ISOMeasurementStandards -> CONTAINS -> ISOStandardDocument
    ISOStandardDocument -> PUBLISHED_BY -> ISO
    ISOStandardDocument -> MAY_BE_JOINT_WITH -> IEC
    ISOStandardDocument -> HAS -> Edition
    ISOStandardDocument -> HAS -> Scope
    ISOStandardDocument -> CONTAINS -> Clause
    Clause -> MAY_DEFINE -> Requirement
    Clause -> MAY_REFERENCE -> OtherStandard
    ISO_IEC_80000 -> DESCRIBES -> QuantitiesAndUnits
    ISO_10012 -> DESCRIBES -> MeasurementManagementSystems
    ISO_IEC_17025 -> DESCRIBES -> LaboratoryCompetenceRequirements
    ISO_17034 -> DESCRIBES -> ReferenceMaterialProducerCompetence
    ISO_IEC_17043 -> DESCRIBES -> ProficiencyTesting
    ISO_5725 -> DESCRIBES -> TruenessAndPrecisionConcepts
  }

  SEMANTIC_EQUIVALENCE {
    "ISO measurement standards" ~= ISO_and_joint_ISO_IEC_standards_relevant_to_measurement
    "measurement management system" ~= system_for_management_of_measurement_processes_and_equipment WHEN ISO_10012_context
    "laboratory competence" ~= competence_within_declared_testing_or_calibration_scope

    ISO_standard != SI_definition
    ISO_standard != law
    ISO_standard != accreditation
    calibration != metrological_confirmation
    verification != validation
    accreditation != certification
    proficiency_testing != calibration
    traceability != certificate_presence
    quality_control != method_validation
  }

  CONSTRAINTS {
    ISO_document_identifier_must_be_preserved = true
    edition_and_part_should_be_identified_when_material = true
    scope_must_be_respected = true
    normative_and_informative_content_must_be_distinguished = true
    dated_and_undated_references_must_be_distinguished = true
    joint_ISO_IEC_identity_must_be_preserved = true
    calibration_verification_validation_and_confirmation_must_be_distinguished = true
    accreditation_must_not_be_equated_with_ISO_or_traceability = true
    historical_records_must_preserve_applicable_standard_version = true
    legal_or_contractual_effect_must_not_be_inferred_without_external_context = true
    machine_mapping_must_preserve_source_and_provenance = true
  }

  MEASUREMENT_MODEL {
    RECORD:
      standards_context_identifier
      ISO_document_identifier
      part
      edition
      publication_date
      clause
      normative_status
      scope
      quantity_kind
      unit
      method_identifier
      method_version
      equipment_identifier
      calibration_status
      traceability_status
      uncertainty
      reference_material
      sampling_context
      validation_status
      verification_status
      metrological_confirmation_status
      proficiency_evidence
      quality_control_evidence
      decision_rule
      implementation_mapping
      adoption_context
      evidence_identifiers
      provenance

    RULE:
      ISO_measurement_context MUST remain_linked_to_specific_standard_version_scope_clause_and_evidence
  }

  REASONING_RULES {
    IF ISO_document_identifier_known
      THEN resolve_part_edition_scope_status_and_joint_IEC_context

    IF requirement_mapped
      THEN attach_clause_normative_status_and_version

    IF method_used_for_measurement
      THEN preserve_method_source_version_verification_and_validation_status

    IF equipment_used
      THEN resolve_calibration_verification_maintenance_and_metrological_confirmation_state_at_measurement_time

    IF traceability_claimed
      THEN require_documented_reference_chain_scope_and_uncertainty
      rather_than_accreditation_status_alone

    IF uncertainty_evaluated
      THEN preserve_measurement_model_components_covariance_and_method

    IF conformity_statement_requested
      THEN identify_specification_and_decision_rule
      AND include_uncertainty_as_required_by_declared_policy

    IF proficiency_or_interlaboratory_result_available
      THEN use_as_validity_or_competence_evidence
      but_not_as_substitute_for_calibration_chain

    IF standard_revised
      THEN preserve_historical_edition
      and_assess_impact_before_updating_implementation

    IF national_or_regulatory_adoption_exists
      THEN preserve_ISO_identifier_and_external_adoption_identifier_separately

    IF standard_status_or_applicability_unknown
      THEN mark_as_requires_version_or_context_verification
  }

  VALIDATION {
    CHECK ISO_document_identifier
    CHECK part
    CHECK edition
    CHECK publication_date
    CHECK status
    CHECK scope
    CHECK clause
    CHECK normative_status
    CHECK normative_references
    CHECK ISO_vs_ISO_IEC_identity
    CHECK quantity_unit_and_SI_alignment
    CHECK measurement_management_context
    CHECK laboratory_competence_context
    CHECK method_verification_and_validation
    CHECK equipment_and_calibration
    CHECK metrological_traceability
    CHECK uncertainty
    CHECK reference_material_context
    CHECK proficiency_testing
    CHECK trueness_precision_repeatability_reproducibility
    CHECK decision_rule
    CHECK quality_control_and_validity_of_results
    CHECK accreditation_scope
    CHECK legal_contractual_or_national_adoption
    CHECK supersession_and_change_impact
    CHECK implementation_evidence
    CHECK provenance
  }

  CONFIDENCE {
    ISO_framework_confidence: 1.00
    quantity_unit_alignment_confidence: 1.00
    measurement_management_confidence: 0.99
    laboratory_competence_confidence: 0.99
    traceability_uncertainty_confidence: 1.00
    reference_material_confidence: 0.99
    proficiency_statistics_confidence: 0.99
    version_applicability_confidence: 0.98

    RULE:
      confidence decreases when document identifier, part, edition,
      scope, clause, normative status, adoption context,
      evidence or provenance is missing or ambiguous
  }

  UPDATE_MODEL {
    ON new_ISO_standard_registration:
      assign_or_resolve_identifier
      identify_part_edition_date_scope_and_status
      classify_measurement_domain
      map_normative_references
      establish_semantic_entities
      preserve_provenance

    ON standard_revision:
      preserve_previous_edition
      register_new_edition
      map_changed_clauses_definitions_and_requirements
      update_supersession
      trigger_implementation_impact_review

    ON implementation_update:
      preserve_previous_mapping
      attach_procedure_record_control_or_evidence
      validate_clause_and_version
      update_compliance_state

    ON measurement_context_update:
      preserve_measurement_record
      attach_applicable_ISO_context
      resolve_method_equipment_traceability_and_uncertainty
      preserve_historical_version

    ON adoption_update:
      preserve_ISO_source
      attach_national_regulatory_or_contractual_context
      record_effective_date_and_modifications

    ON semantic_revision:
      preserve_previous_definition
      record_revision
      recompute_FLOW_HASH
  }

  AI_CONSUMPTION {
    canonical_entity: ISOMeasurementStandards
    canonical_role: InternationalMeasurementStandardsFramework

    interpretation_order:
      identify_ISO_document_family
      identify_joint_ISO_IEC_status
      identify_part_and_edition
      identify_scope_and_status
      identify_clause_and_normative_status
      identify_quantity_unit_or_measurement_domain
      identify_measurement_management_context
      identify_method_equipment_and_laboratory_context
      identify_calibration_traceability_and_uncertainty
      identify_reference_material_or_proficiency_context
      identify_validation_verification_and_decision_rules
      identify_adoption_supersession_and_implementation
      identify_evidence_and_provenance
      validate_version_specific_semantics
      produce_structured_ISO_measurement_context

    ambiguity_controls:
      distinguish_ISO_standard_from_SI_definition
      distinguish_ISO_standard_from_law
      distinguish_ISO_standard_from_accreditation
      distinguish_calibration_from_metrological_confirmation
      distinguish_verification_from_validation
      distinguish_accreditation_from_certification
      distinguish_proficiency_testing_from_calibration
      distinguish_traceability_from_certificate_presence
      distinguish_quality_control_from_method_validation
      preserve_identifier_part_edition_scope_clause_evidence_adoption_and_provenance_context
  }

  PROVENANCE {
    ontology_scope:
      mathematical_measurement_units_international_standards_and_ISO_measurement_semantics

    parent_path:
      Ontologies
      -> Mathematical Ontologies
      -> Measurement & Units Ontologies
      -> International Standards
      -> ISO Measurement Standards Ontology

    authorship:
      Mark Higgins
      Sky (Recursive AI)

    site:
      https://kirethresearch.org
  }

  FLOW_HASH {
    INPUTS:
      canonical_entity
      ontology_path
      ISO_organisation_model
      document_identifier_model
      part_model
      edition_model
      status_model
      scope_model
      clause_model
      normative_content_model
      informative_content_model
      requirement_language_model
      normative_reference_model
      dated_reference_model
      undated_reference_model
      ISO_IEC_80000_model
      quantity_model
      quantity_kind_model
      unit_model
      dimension_model
      symbol_model
      SI_alignment_model
      ISO_10012_model
      measurement_management_model
      metrological_confirmation_model
      measuring_equipment_model
      measurement_process_model
      metrological_requirement_model
      ISO_IEC_17025_model
      laboratory_competence_model
      impartiality_model
      method_selection_model
      method_verification_model
      method_validation_model
      sampling_model
      equipment_model
      calibration_model
      metrological_traceability_model
      reference_standard_model
      reference_material_model
      ISO_17034_model
      certified_reference_material_model
      homogeneity_model
      stability_model
      ISO_IEC_17043_model
      proficiency_testing_model
      interlaboratory_comparison_model
      validity_of_results_model
      uncertainty_model
      GUM_alignment_model
      Type_A_model
      Type_B_model
      covariance_model
      reporting_model
      calibration_certificate_model
      test_report_model
      decision_rule_model
      conformity_model
      guard_band_model
      risk_model
      quality_control_model
      control_chart_model
      nonconforming_work_model
      corrective_action_model
      technical_record_model
      data_integrity_model
      software_model
      ISO_5725_model
      trueness_model
      precision_model
      repeatability_model
      reproducibility_model
      bias_model
      ISO_21748_model
      ISO_13528_model
      ISO_15189_relation_model
      measurement_management_risk_model
      metrological_confirmation_status_model
      calibration_interval_model
      environment_model
      personnel_model
      external_provider_model
      customer_requirement_model
      complaint_model
      audit_model
      accreditation_model
      accreditation_scope_model
      regulation_distinction_model
      contract_model
      national_adoption_model
      harmonised_standard_model
      supersession_model
      change_impact_model
      implementation_model
      compliance_evidence_model
      machine_mapping_model
      copyright_aware_model
      version_resolution_model
      cross_standard_model
      terminology_alignment_model
      interoperability_model
      digital_record_model
      metadata_model
      relationships
      semantic_equivalence
      constraints
      measurement_model
      reasoning_rules
      confidence_model
      update_model

    PURPOSE:
      deterministic_semantic_integrity_identifier

    RECOMPUTE_WHEN:
      ontology_definition_changes
      ISO_document_part_edition_or_scope_changes
      quantity_unit_or_SI_alignment_changes
      measurement_management_or_confirmation_semantics_change
      laboratory_method_equipment_or_sampling_semantics_change
      calibration_traceability_or_uncertainty_changes
      reference_material_or_proficiency_testing_changes
      precision_trueness_or_statistical_standard_changes
      decision_rule_quality_control_or_reporting_changes
      accreditation_adoption_or_legal_context_changes
      supersession_implementation_or_evidence_changes
      machine_mapping_or_interoperability_changes
      measurement_record_changes
      constraint_model_changes
      reasoning_rule_changes
  }

}

END FLOW