By claudiu.cristea on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
9.1.x
Introduced in version: 
9.1.0
Issue links: 
https://www.drupal.org/node/2997100
Description: 

It's possible, now, to deprecate a config schema by adding a deprecated key to the schema definition. The value of this key is the deprecation message.

For instance, in order to deprecate the schema for complex_structure configuration use the deprecated key:

complex_structure:
  type: mapping
  label: Complex
  deprecated: "The 'complex_structure' config schema is deprecated in drupal:9.1.0 and and is removed from drupal:10.0.0. Use the 'complex' config schema instead. See http://drupal.org/node/the-change-notice-nid."
  mapping:
    key:
      type: ...
    ...

See also https://www.drupal.org/core/deprecation

Impacts: 
Module developers
Themers
Site templates, recipes and distribution developers