type: object
required:
- toProperty
- equation
- symbols
- model
properties:
  id:
    $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
    description: Identifier (IRI or CURIE) for this equation record.
    x-jsonld-id: '@id'
  type:
    description: Relationship type. Use EquationPropertyRelationship, optionally alongside
      PropertyRelationship.
    oneOf:
    - const: EquationPropertyRelationship
    - type: array
      contains:
        const: EquationPropertyRelationship
      items:
        type: string
    x-jsonld-id: '@type'
  relationshipKind:
    const: equation
    description: Discriminator for equation-based relationships.
    x-jsonld-id: https://schema.org/additionalType
  fromProperty:
    $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
    description: "Optional. Use when the record focuses on one specific symbol-edge
      of the equation (a sensitivity / cross-impact reading); it must then match exactly
      one entry in `symbols[]` by its `fromProperty`. Omit when the record describes
      the equation as a whole \u2014 the full table is in `symbols[]` and there is
      no single \"from\".\n"
    x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/fromProperty
    x-jsonld-type: '@id'
  toProperty:
    $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
    description: IRI or CURIE of the derived target property calculated by the equation.
    x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/toProperty
    x-jsonld-type: '@id'
  equation:
    type: string
    minLength: 1
    description: Canonical mathematical expression. It should match schema:mathExpression
      on the target property definition.
    x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasEquation
  symbols:
    type: array
    minItems: 1
    description: 'Complete symbol table for `equation`: one entry per symbol used
      in the expression. For equation-level records, top-level `fromProperty` is omitted
      and `symbols[]` is the full computable table. For symbol-centred records, the
      primary symbol is the entry whose `fromProperty` equals top-level `fromProperty`;
      the other entries remain in the table so the record is computationally self-contained.

      '
    items:
      type: object
      required:
      - symbol
      - fromProperty
      - bindings
      properties:
        symbol:
          type: string
          minLength: 1
          description: LaTeX symbol as it occurs literally in `equation`.
          x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasSymbol
        symbolAliases:
          type: array
          description: Alternative renderings (ASCII variants, plain forms).
          items:
            type: string
            minLength: 1
          x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasSymbolAlias
          x-jsonld-container: '@set'
        fromProperty:
          $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
          description: Abstract Rainbow IRI for this symbol.
          x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/fromProperty
          x-jsonld-type: '@id'
        variableKind:
          type: string
          enum:
          - featureOfInterest
          - intensiveQuantity
          - extensiveQuantity
          - adjustmentFactor
          - timeCoefficient
          - rateCoefficient
          - uncertaintyFactor
          - aggregationIndex
          description: 'Semantic role of the symbol in the equation.

            '
          x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasVariableKind
          x-jsonld-type: '@vocab'
        dimensionKind:
          $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
          description: 'Unit-abstract dimensional type as a QUDT QuantityKind URI
            (e.g. `quantitykind:Area`, `quantitykind:SurfaceDensity`, `quantitykind:Dimensionless`,
            `quantitykind:Time`, `quantitykind:Frequency`). Decouples dimensional
            analysis from unit selection.

            '
          x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasDimensionKind
          x-jsonld-type: '@id'
        indexed:
          type: boolean
          default: false
          description: 'True if the term is iterated under the aggregation index of
            toProperty (e.g. per-taxon `D_{pre,i}`).

            '
          x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/isIndexed
        index:
          type: string
          description: Index symbol, e.g. "i". Only meaningful when `indexed` is true.
          x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasIndex
        indexedBy:
          $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
          description: 'IRI of the entity class whose instances enumerate the index
            (e.g. `odd:TaxonGroup`). Required when `indexed` is true.

            '
          x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasIndexedBy
          x-jsonld-type: '@id'
        equationRole:
          type: string
          enum:
          - input
          - coefficient
          - normaliser
          - lossTerm
          - uncertaintyTerm
          - qualityTerm
          - output
          - other
          description: Role this symbol plays in the equation.
          x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasEquationRole
          x-jsonld-type: '@vocab'
        operator:
          type: string
          enum:
          - sum
          - product
          - subtract
          - divide
          - transform
          - weightedSum
          - other
          description: Main operation connecting this symbol to the equation.
          x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasOperator
          x-jsonld-type: '@vocab'
        bindings:
          type: array
          minItems: 1
          description: 'Concrete vocabulary IRIs that realise the abstract `fromProperty`
            of this symbol. Use when one symbol expands over an index (per-taxon,
            per-region), or when alternate / fallback measurements exist.

            '
          items:
            type: object
            required:
            - variable
            properties:
              variable:
                $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
                description: Concrete Rainbow IRI realising the entry's fromProperty.
                x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/bindingVariable
                x-jsonld-type: '@id'
              indexValue:
                type: string
                description: Value of the equation index variable (e.g. "Mytilus edulis").
                x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/bindingIndexValue
              bindingRole:
                type: string
                enum:
                - primary
                - alternate
                - fallback
                - expansion
                default: primary
                x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/bindingRole
                x-jsonld-type: '@vocab'
              validityScope:
                type: string
                description: Short scope note (region, scenario, season).
                x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/bindingValidityScope
              evidence:
                oneOf:
                - $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
                - type: array
                  items:
                    $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
                x-jsonld-id: http://www.w3.org/ns/prov#wasDerivedFrom
                x-jsonld-type: '@id'
          x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasBinding
          x-jsonld-container: '@set'
        explanation:
          type: string
          description: Human-readable note about this symbol.
          x-jsonld-id: http://www.w3.org/2000/01/rdf-schema#comment
    x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasEquationSymbol
    x-jsonld-container: '@set'
  weight:
    description: Optional sensitivity or coefficient value. In this profile it is
      not a causal cross-impact weight.
    type: object
    required:
    - value
    properties:
      value:
        type: number
        description: Numeric sensitivity or coefficient value.
        x-jsonld-id: http://qudt.org/schema/qudt/numericValue
    x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/hasWeight
    x-jsonld-type: '@id'
  model:
    description: Model that defines or evaluates this equation relationship (prov:wasAttributedTo).
    type: object
    required:
    - id
    properties:
      id:
        type: string
        description: Identifier of the model (dct:identifier).
        x-jsonld-id: http://purl.org/dc/terms/identifier
      name:
        type: string
        description: Human-readable label of the model (rdfs:label).
        x-jsonld-id: http://www.w3.org/2000/01/rdf-schema#label
      uri:
        type: string
        description: URI of the model resource.
        x-jsonld-id: '@id'
    x-jsonld-id: http://www.w3.org/ns/prov#wasAttributedTo
  reef-effect:
    description: Experiment activity that evaluated this relationship (prov:wasGeneratedBy).
    type: object
    required:
    - id
    properties:
      id:
        type: string
        description: Identifier of the experiment (dct:identifier).
        x-jsonld-id: '@id'
      name:
        type: string
        description: Human-readable label of the experiment (rdfs:label).
        x-jsonld-id: http://www.w3.org/2000/01/rdf-schema#label
      uri:
        type: string
        description: URI of the experiment resource.
      start:
        type: string
        format: date-time
        pattern: ^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(\\.\\d+)?(Z|[+-]\\d{2}:\\d{2})?$
        description: Date and time when the experiment started (prov:startedAtTime).
      end:
        type: string
        format: date-time
        pattern: ^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(\\.\\d+)?(Z|[+-]\\d{2}:\\d{2})?$
        description: Date and time when the experiment ended (prov:endedAtTime).
  evidence:
    oneOf:
    - $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
    - type: array
      items:
        $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
    description: Evidence or definition source for the equation relationship.
    x-jsonld-id: http://www.w3.org/ns/prov#wasDerivedFrom
    x-jsonld-type: '@id'
  explanation:
    type: string
    description: Human-readable explanation of how the primary fromProperty participates
      in the equation.
    x-jsonld-id: http://www.w3.org/2000/01/rdf-schema#comment
additionalProperties: true
x-jsonld-extra-terms:
  PropertyRelationship: https://w3id.org/ogc/hosted/seadots/prop-rel/PropertyRelationship
  EquationPropertyRelationship: https://w3id.org/ogc/hosted/seadots/prop-rel/EquationPropertyRelationship
  targetDefinition:
    x-jsonld-id: https://w3id.org/ogc/hosted/seadots/prop-rel/targetDefinition
    x-jsonld-context:
      id: '@id'
      type: '@type'
      name: http://www.w3.org/2000/01/rdf-schema#label
      mathExpression: https://schema.org/mathExpression
      wasDerivedFrom:
        '@id': http://www.w3.org/ns/prov#wasDerivedFrom
        '@type': '@id'
        '@container': '@set'
      aggregation:
        '@id': https://w3id.org/ogc/hosted/seadots/prop-rel/hasAggregation
        '@context':
          type: '@type'
          operator:
            '@id': https://w3id.org/ogc/hosted/seadots/prop-rel/aggregationOperator
            '@type': '@id'
          aggregatesOver:
            '@id': https://w3id.org/ogc/hosted/seadots/prop-rel/aggregatesOver
            '@type': '@id'
          indexSymbol: https://w3id.org/ogc/hosted/seadots/prop-rel/indexSymbol
  experiment:
    x-jsonld-id: http://www.w3.org/ns/prov#wasGeneratedBy
    x-jsonld-context:
      id: http://purl.org/dc/terms/identifier
      name: http://www.w3.org/2000/01/rdf-schema#label
      uri: '@id'
      start:
        '@id': http://www.w3.org/ns/prov#startedAtTime
        '@type': http://www.w3.org/2001/XMLSchema#dateTime
      end:
        '@id': http://www.w3.org/ns/prov#endedAtTime
        '@type': http://www.w3.org/2001/XMLSchema#dateTime
x-jsonld-prefixes:
  rdfs: http://www.w3.org/2000/01/rdf-schema#
  prop-rel: https://w3id.org/ogc/hosted/seadots/prop-rel/
  schema: https://schema.org/
  prov: http://www.w3.org/ns/prov#
  qudt: http://qudt.org/schema/qudt/
  dct: http://purl.org/dc/terms/
  xsd: http://www.w3.org/2001/XMLSchema#
  quantitykind: http://qudt.org/vocab/quantitykind/
  odd: https://w3id.org/iliad/odd#
  tc: http://rs.tdwg.org/ontology/voc/TaxonConcept#
  indo: https://w3id.org/indicators/marine/obs/
  indp: https://w3id.org/indicators/marine/parameters/
  ind: https://w3id.org/indicators/marine/