In order for various systems to properly interact with the configuration items, configuration schemas have been introduced. Schemas are a way to define the configuration items and specify what kind of data they store, be it strings, Booleans, integers, and so on. They are, of course, notated in YAML format and go inside the config/schema folder of a module.
There are three main reasons why configuration needs a schema definition:
- Multilingual support: As we will see later, configuration is translatable in Drupal 8. However, in order to know which parts of the configuration are needed to be, or can be, translated, the schema system has been brought in to provide this additional layer. This way, configuration items that ship with contributed ...
