$schema: https://json-schema.org/draft/2020-12/schema
description: 'An AggregateSolid feature: a single combined volumetric object formed
  by referencing a set of member Solid features by id, without describing any new
  boundary geometry of its own. geometry must be null.'
$defs:
  testCollection:
    $anchor: testCollection
    description: A convenience ref to a complete, testable collection objects and
      references
    $ref: https://ogcincubator.github.io/topo-feature/build/annotated/geo/topo/features/topo-feature-collection/schema.yaml
allOf:
- $ref: https://ogcincubator.github.io/topo-feature/build/annotated/geo/topo/features/topo-feature/schema.yaml
- properties:
    geometry:
      type: 'null'
    topology:
      properties:
        type:
          type: string
          const: AggregateSolid
        references:
          type: array
          description: Ids of the member Solid features aggregated into this combined
            volume.
          items:
            $ref: https://opengeospatial.github.io/bblocks/annotated-schemas/ogc-utils/iri-or-curie/schema.yaml
          minItems: 1
      required:
      - type
      - references
      not:
        required:
        - directed_references
  required:
  - topology