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:
    purge_batch_size:
      type: integer
      label: 'Maximum number of field data records to purge'

field.storage.*.*:
  type: config_entity
  label: 'Field'
  mapping:
    id:
      type: string
      label: 'ID'
    name:
      type: string
      label: 'Name'
    entity_type:
      type: string
      label: 'Entity type'
    type:
      type: string
      label: 'Type'
    settings:
      type: field.[%parent.type].settings
    module:
      type: string
      label: 'Module'
    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: ignore
              label: 'Index'

field.instance.*.*.*:
  type: config_entity
  label: 'Field instance'
  mapping:
    id:
      type: string
      label: 'ID'
    label:
      type: label
      label: 'Label'
    field_name:
      type: string
      label: 'Field name'
    entity_type:
      type: string
      label: 'Entity type'
    bundle:
      type: string
      label: 'Bundle'
    description:
      type: text
      label: 'Help text'
    required:
      type: boolean
      label: 'Required field'
    translatable:
      type: boolean
      label: 'Translatable'
    default_value:
      type: field.[%parent.field_type].value
    default_value_function:
      type: string
      label: 'Default value function'
    settings:
      type: field.[%parent.field_type].instance_settings
    field_type:
      type: string
      label: 'Field type'

entity_form_display.field.hidden:
  type: entity_field_form_display_base
  label: '- Hidden - format settings'
  mapping:
    settings:
      type: sequence
      label: 'Settings'
      sequence:
        - type: string

# Schema for the configuration files of the Boolean field type.
field.boolean.settings:
  type: mapping
  label: 'Boolean settings'
  mapping:
    on_label:
      type: string
      label: 'On label'
    off_label:
      type: string
      label: 'Off label'

field.boolean.instance_settings:
  label: 'Boolean settings'
  type: mapping
  mapping: {  }

field.boolean.value:
  type: sequence
  label: 'Default value'
  sequence:
    - type: mapping
      label: 'Default'
      mapping:
        value:
          type: integer
          label: 'Value'

# Schema for the configuration files of the Email field type.

field.email.settings:
  type: sequence
  label: 'Email settings'
  sequence:
    - type: string

field.email.instance_settings:
  type: sequence
  label: 'Email settings'
  sequence:
    - type: string
      label: 'Setting'

field.email.value:
  type: sequence
  label: 'Default value'
  sequence:
    - type: mapping
      label: 'Default'
      mapping:
        value:
          type: email
          label: 'Value'

# Schema for configuration files of a numeric field types.

field.integer.settings:
  type: sequence
  label: 'Integer settings'
  sequence:
    - type: string
      label: 'setting'

field.integer.instance_settings:
  type: mapping
  label: 'Integer'
  mapping:
    min:
      type: integer
      label: 'Minimum'
    max:
      type: integer
      label: 'Maximum'
    prefix:
      type: string
      label: 'Prefix'
    suffix:
      type: string
      label: 'Suffix'

field.integer.value:
  type: sequence
  label: 'Default value'
  sequence:
    - type: mapping
      label: 'Default value'
      mapping:
        value:
          type: integer
          label: 'Value'

field.decimal.settings:
  type: mapping
  label: 'Decimal settings'
  mapping:
    precision:
      type: integer
      label: 'Precision'
    scale:
      type: integer
      label: 'Scale'

field.decimal.instance_settings:
  type: mapping
  label: 'Decimal'
  mapping:
    min:
      type: float
      label: 'Minimum'
    max:
      type: float
      label: 'Maximum'
    prefix:
      type: string
      label: 'Prefix'
    suffix:
      type: string
      label: 'Suffix'

field.decimal.value:
   type: sequence
   label: 'Default value'
   sequence:
     - type: mapping
       label: 'Default value'
       mapping:
         value:
           type: float
           label: 'Value'

field.float.settings:
  type: sequence
  label: 'Float settings'
  sequence:
    - type: string
      label: 'setting'

field.float.instance_settings:
  type: mapping
  label: 'Float'
  mapping:
    min:
      type: float
      label: 'Minimum'
    max:
      type: float
      label: 'Maximum'
    prefix:
      type: string
      label: 'Prefix'
    suffix:
      type: string
      label: 'Suffix'

field.float.value:
  type: sequence
  label: 'Default value'
  sequence:
    - type: mapping
      label: 'Default value'
      mapping:
        value:
          type: float
          label: 'Value'

entity_view_display.field.number_decimal:
  type: entity_field_view_display_base
  label: 'Number decimal display format settings'
  mapping:
    settings:
      type: mapping
      label: 'Settings'
      mapping:
        thousand_separator:
          type: string
          label: 'Thousand marker'
        decimal_separator:
          type: string
          label: 'Decimal marker'
        scale:
          type: integer
          label: 'Scale'
        prefix_suffix:
          type: boolean
          label: 'Display prefix and suffix.'

entity_view_display.field.number_integer:
  type: entity_field_view_display_base
  label: 'Number interger display format settings'
  mapping:
    settings:
      type: mapping
      label: 'Settings'
      mapping:
        thousand_separator:
          type: string
          label: 'Thousand marker'
        prefix_suffix:
          type: boolean
          label: 'Display prefix and suffix.'

entity_view_display.field.number_unformatted:
  type: entity_field_view_display_base
  label: 'Number unformatted display format settings'
  mapping:
    settings:
      type: sequence
      label: 'Settings'
      sequence:
        - type: string

entity_form_display.field.number:
  type: entity_field_form_display_base
  label: 'Number default display format settings'
  mapping:
    settings:
      type: mapping
      label: 'Settings'
      mapping:
        placeholder:
          type: label
          label: 'Placeholder'

entity_form_display.field.checkbox:
  type: entity_field_form_display_base
  label: 'Single on/off checkbox format settings'
  mapping:
    settings:
      type: mapping
      label: 'Settings'
      mapping:
        display_label:
          type: boolean
          label: 'Use field label instead of the "On value" as label'