SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
copyrights:
- Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
enabled-by: true
links:
- role: spec-member
  uid: root
spec-description: |
  It defines which explicit attributes are mandatory.
spec-example: null
spec-info:
  list:
    description: |
      The list defines the mandatory attributes through their key names.
    spec-type: name
  str:
    assert:
      in:
      - all
      - at-least-one
      - at-most-one
      - exactly-one
      - none
    description: |
      It defines how many explicit attributes are mandatory.  If `none` is
      used, then none of the explicit attributes is mandatory, they are all
      optional.
spec-name: Specification Mandatory Attributes
spec-type: spec-mandatory-attributes
type: spec