drupal/core/modules/field/config/schema/field.schema.yml

# Schema for configuration files of the Field module.

field.settings:
  type: mapping
  label: 'Field settings'
  mapping:
    default_storage:
      type: string
      label: 'The default storage backend for a field'
    language_fallback:
      type: boolean
      label: 'Whether the field display falls back to global language fallback configuration'
    purge_batch_size:
      type: integer
      label: 'Maximum number of field data records to purge'

field.field.*:
  type: mapping
  label: 'Field'
  mapping:
    id:
      type: string
      label: 'Machine name'
    uuid:
      type: string
      label: 'UUID'
    status:
      type: boolean
      label: 'Status'
    langcode:
      type: string
      label: 'Default language'
    type:
      type: string
      label: 'Type'
    settings:
      type: field.[%parent.type].settings
    module:
      type: string
      label: 'Module'
    active:
      type: boolean
      label: 'Active'
    entity_types:
      type: sequence
      label: 'Allowed entity types'
      sequence:
        - type: string
          label: 'Entity type'
    storage:
      type: mapping
      label: 'Storage'
      mapping:
        type:
          type: string
          label: 'Type'
        settings:
          type: field_storage.[%parent.type].settings
          label: 'Settings'
        module:
          type: string
          label: 'Module'
        active:
          type: boolean
          label: 'Active'
    locked:
      type: boolean
      label: 'Locked'
    cardinality:
      type: integer
      label: 'Maximum number of values users can enter'
    translatable:
      type: boolean
      label: 'Translatable'
    indexes:
      type: sequence
      label: 'Indexes'
      sequence:
        - type: sequence
          label: 'Indexes'
          sequence:
            - type: string
              label: 'Column'

field.instance.*.*.*:
  type: mapping
  label: 'Field instance'
  mapping:
    id:
      type: string
      label: 'ID'
    uuid:
      type: string
      label: 'UUID'
    status:
      type: boolean
      label: 'Status'
    langcode:
      type: string
      label: 'Default language'
    field_uuid:
      type: string
      label: 'Field UUID'
    entity_type:
      type: string
      label: 'Allowed entity types'
    bundle:
      type: string
      label: 'Bundle'
    label:
      type: label
      label: 'Label'
    description:
      type: text
      label: 'Help text'
    required:
      type: boolean
      label: 'Required field'
    default_value:
      type: field.[%parent.field_type].value
    default_value_function:
      type: string
      label: 'Default value funtion'
    settings:
      type: field.[%parent.field_type].instance_settings
    field_type:
      type: string
      label: 'Field type'