---
$schema: "http://json-schema.org/draft-07/schema#"
$id: "https://oimlsmart.org/schemas/R60.yaml"
title: "OIML R60 (Load Cells) Certificate Schema"
type: object
required: [certificate, certified_type, characteristics, recommendation]
properties:
  certificate:           { $ref: "_core.yaml#/definitions/Certificate" }
  issuing_authority:     { $ref: "_core.yaml#/definitions/IssuingAuthority" }
  applicants:            { $ref: "_core.yaml#/definitions/PartyList" }
  manufacturers:         { $ref: "_core.yaml#/definitions/PartyList" }
  certified_type:        { $ref: "#/definitions/CertifiedType" }
  characteristics:       { $ref: "#/definitions/Characteristics" }
  recommendation:
    type: object
    required: [id, edition, scheme]
    properties:
      id:          { type: string, const: R60 }
      edition:
        type: integer
        oneOf:
        - const: 2017
          description: Edition 2017
        - const: 2021
          description: Edition 2021
        - const: 1
          description: Legacy edition 1 (pre-2017 numbering)
      amendment:   { type: [integer, "null"] }
      scheme:      { type: string, enum: [A, B] }
      accuracy_classes:
        type: array
        items:
          type: string
          description: |
            R60 accuracy class or classification symbol. Bare letters (A, B, C, D)
            are the base class; full symbols (C3, C4MI7.5, D1, etc.) per R60-1
            §5.1.6 figure 4 encode class + max intervals (thousands) + optional
            multi-interval marker.
          anyOf:
          - enum: [A, B, C, D, "N/A"]
          - pattern: '^[ABCD]\d+(MI\d+(\.\d+)?)?$'
  test_reports:          { $ref: "_core.yaml#/definitions/TestReportList" }
  revision_history:      { $ref: "_core.yaml#/definitions/RevisionHistory" }
  model_family:          { $ref: "_core.yaml#/definitions/ModelFamily" }
  components:
    type: array
    items: { $ref: "_core.yaml#/definitions/Component" }
  footnotes:             { $ref: "_core.yaml#/definitions/FootnoteList" }
  d011_tests_applicable:
    description: Tests mandated by R60-2 §2.10 type evaluation.
    type: array
    items: { $ref: "#/definitions/D011TestReference" }
    default:
    - { test_id: d011_t06_static_temperature }
    - { test_id: d011_t07_static_temperature }
    - { test_id: d011_t11_atmospheric_pressure }
    - { test_id: d011_t08_damp_heat_steady_state }
    - { test_id: d011_t09_damp_heat_cyclic }
    - { test_id: d011_t18_dc_mains_voltage_variation }
    - { test_id: d011_t20_ac_mains_voltage_variation }
    - { test_id: d011_t22_dc_mains_dips_interruptions }
    - { test_id: d011_t23_ac_mains_dips_interruptions }
    - { test_id: d011_t26_bursts_ac_dc_mains }
    - { test_id: d011_t27_surges_ac_dc_mains }
    - { test_id: d011_t28_bursts_signal_data_control }
    - { test_id: d011_t29_surges_signal_data_control }
    - { test_id: d011_t33_rf_em_fields_general }
    - { test_id: d011_t35_electrostatic_discharges }

definitions:
  AccuracyClass:
    description: OIML R60-1 §5.1.1 load cell accuracy class.
    allOf:
    - $ref: "_core.yaml#/definitions/StructuredValue"
    - properties:
        value:
          oneOf:
          - type: string
            oneOf:
            - const: A
              description: Class A — highest precision, ≥ 50 000 intervals
            - const: B
              description: Class B — high precision, 5 000–100 000 intervals
            - const: C
              description: Class C — medium precision, 500–10 000 intervals
            - const: D
              description: Class D — lower precision, 100–1 000 intervals
            - const: "N/A"
              description: Not applicable
          - type: array
            description: Multi-class load cell (e.g. certified for both C and D).
            minItems: 1
            items:
              type: string
              enum: [A, B, C, D]

  LoadCellCharacterization:
    description: |
      R60-1 §3.2 load cell characterization. "N/A" is allowed for cases where
      the load cell has no meaningful characterization. Accepts either a bare
      canonical token string or a StructuredValue wrapping it (normalized form).
    oneOf:
    - type: string
      oneOf:
      - const: analog_passive
        description: Analogue-passive load cell
      - const: analog_active
        description: Analogue-active load cell
      - const: digital_passive
        description: Digital-passive load cell
      - const: digital_active
        description: Digital-active load cell
      - const: "N/A"
        description: Not applicable
    - allOf:
      - $ref: "_core.yaml#/definitions/StructuredValue"
      - properties:
          value:
            type: string
            oneOf:
            - const: analog_passive
              description: Analogue-passive load cell
            - const: analog_active
              description: Analogue-active load cell
            - const: digital_passive
              description: Digital-passive load cell
            - const: digital_active
              description: Digital-active load cell
            - const: "N/A"
              description: Not applicable

  ClassificationSymbol:
    description: |
      R60-1 §5.1.6 figure 4 classification symbol encoding accuracy class +
      maximum number of load cell intervals (in thousands) +
      optional Multi-Interval marker, load direction (↑ tension / ↓ compression),
      humidity marking (NH/SH/CH), and special temperature limits.
    type: string
    pattern: '^[ABCD]\d+(MI\d+(\.\d+)?)?(\s*[↑↓]+\s*)?(\s*(NH|SH|CH))?(\s*-?\d+/-?\d+)?$'
    examples:
    - C3
    - C2 NH
    - "C3 ↑↓ -5/30"
    - C3MI7.5

  HumidityMarking:
    description: |
      R60-1 §5.1.6 figure 4 load-cell humidity marking. Distinct from
      D 11 climatic_environment_class (H1/H2/H3) which describes the
      instrument's installed location rather than the load cell itself.
    allOf:
    - $ref: "_core.yaml#/definitions/StructuredValue"
    - properties:
        value:
          type: string
          oneOf:
          - const: CH
            description: Condensing humidity — tested per D 11 table 9 (damp heat, cyclic)
          - const: NH
            description: Not tested for humidity
          - const: SH
            description: Stable humidity — tested per D 11 table 8 (damp heat, steady state)

  CertifiedType:
    type: object
    required: [category, type_designations]
    properties:
      category: { type: string, const: "Load cell" }
      type_designations:
        type: array
        minItems: 1
        items: { type: string }
      module_designation:
        oneOf:
        - $ref: "#/definitions/LoadCellCharacterization"
        - type: "null"
      description: { type: string }

  Characteristics:
    type: object
    properties:
      type_level: { $ref: "#/definitions/TypeLevel" }
      model_level:
        type: array
        items: { $ref: "#/definitions/ModelLevelEntry" }
      config_level:
        type: array
        items: { $ref: "#/definitions/ConfigLevelEntry" }

  TypeLevel:
    type: object
    properties:
      accuracy_class:                    { $ref: "#/definitions/AccuracyClass" }
      classification_symbol:             { $ref: "#/definitions/ClassificationSymbol" }
      humidity_class:                    { $ref: "#/definitions/HumidityMarking" }
      temperature_range:                 { $ref: "_modules/d011_environmental.yaml#/definitions/TemperatureRange" }
      electromagnetic_environment_class: { $ref: "_modules/d011_environmental.yaml#/definitions/EMClass" }
      mechanical_environment_class:      { $ref: "_modules/d011_environmental.yaml#/definitions/MechanicalClass" }
      maximum_capacity:                  { $ref: "_core.yaml#/definitions/StructuredValue" }
      minimum_dead_load:                 { $ref: "_core.yaml#/definitions/StructuredValue" }
      maximum_number_of_load_cell_intervals_nlc: { $ref: "_core.yaml#/definitions/StructuredValue" }
      ratio_y_emax_over_vmin:            { $ref: "_core.yaml#/definitions/StructuredValue" }
      ratio_z_emax_over_2dr:             { $ref: "_core.yaml#/definitions/StructuredValue" }
      apportioning_factor_plc:           { $ref: "_core.yaml#/definitions/StructuredValue" }
      rated_output:                      { $ref: "_core.yaml#/definitions/StructuredValue" }
      input_impedance:                   { $ref: "_core.yaml#/definitions/StructuredValue" }
      output_impedance:                  { $ref: "_core.yaml#/definitions/StructuredValue" }
      safe_overload:                     { $ref: "_core.yaml#/definitions/StructuredValue" }
      safe_overload_reference:           { $ref: "_core.yaml#/definitions/StructuredValue" }
      recommended_excitation:            { $ref: "_core.yaml#/definitions/StructuredValue" }
      excitation_maximum:                { $ref: "_core.yaml#/definitions/StructuredValue" }
      transducer_material:               { $ref: "_core.yaml#/definitions/StructuredValue" }
      atmospheric_protection:            { $ref: "_core.yaml#/definitions/StructuredValue" }
      characterization_of_load_cell_capabilities: { $ref: "#/definitions/LoadCellCharacterization" }
      number_of_counts_for_emax:         { $ref: "_core.yaml#/definitions/StructuredValue" }
      software_identification:           { $ref: "_core.yaml#/definitions/SoftwareIdentification" }

  ModelLevelEntry:
    type: object
    required: [attribute, values]
    properties:
      attribute: { type: string }
      unit:      { $ref: "_units.yaml#/definitions/Unit" }
      values:
        type: array
        items:
          type: object
          required: [model, value]
          properties:
            model:            { type: string }
            value:            { $ref: "_core.yaml#/definitions/ValueOrScalar" }
            footnote_markers:
              type: array
              items: { type: string }

  ConfigLevelEntry:
    type: object
    required: [attribute, axis, values]
    properties:
      attribute: { type: string }
      axis:      { oneOf: [ { type: string }, { type: "null" } ] }
      unit:      { $ref: "_units.yaml#/definitions/Unit" }
      values:
        type: array
        items:
          type: object
          anyOf:
          - required: [condition, value]
            properties:
              condition: { type: string }
              value:     { $ref: "_core.yaml#/definitions/ValueOrScalar" }
          - required: [model, value]
            properties:
              model:     { type: string }
              value:     { $ref: "_core.yaml#/definitions/ValueOrScalar" }

  D011TestReference:
    description: Reference to an OIML D 11:2013 performance test.
    type: object
    required: [test_id]
    properties:
      test_id:          { type: string, pattern: '^d011_t\d{2}_' }
      test_level_index: { type: integer, minimum: 1, maximum: 5 }
      notes:            { type: string }

allOf:
- description: |
    Conditional applicability of D 11 damp heat tests (R60-2 §2.10.6):
    t08 (steady state) applies iff humidity_class = SH;
    t09 (cyclic) applies iff humidity_class = CH.
  if:
    properties:
      characteristics:
        properties:
          type_level:
            properties:
              humidity_class: { const: SH }
  then:
    properties:
      d011_tests_applicable: { contains: { properties: { test_id: { const: d011_t08_damp_heat_steady_state } } } }
- if:
    properties:
      characteristics:
        properties:
          type_level:
            properties:
              humidity_class: { const: CH }
  then:
    properties:
      d011_tests_applicable: { contains: { properties: { test_id: { const: d011_t09_damp_heat_cyclic } } } }
- description: |
    Conducted/radiated EM tests apply only to analogue-active and
    digital-active load cells per R60-2 §2.10.7.
  if:
    properties:
      certified_type:
        properties:
          module_designation: { enum: [analog_passive, digital_passive] }
  then:
    properties:
      d011_tests_applicable:
        not:
          contains:
            properties:
              test_id:
                enum:
                - d011_t18_dc_mains_voltage_variation
                - d011_t20_ac_mains_voltage_variation
                - d011_t22_dc_mains_dips_interruptions
                - d011_t23_ac_mains_dips_interruptions
                - d011_t26_bursts_ac_dc_mains
                - d011_t27_surges_ac_dc_mains
                - d011_t28_bursts_signal_data_control
                - d011_t29_surges_signal_data_control
                - d011_t33_rf_em_fields_general
                - d011_t35_electrostatic_discharges