We are currently using the word "Localisation" (sometimes "Localization") to mean a child version of a document (or folder) that has been then customised to fit a specific situation. In this case ...
Is the implementation of a stability index for a UI component or design pattern in a style guide useful/practical?
The concept of a stability index where the likelihood for the content, where it is code or a specification (e.g. in the documentation of the Node.js API) looks to be rather useful and can be adopted ...