Final and Non-final Structures
Maintainable structures have a state flag which can be set to either Final or Non-Final.
Final indicates to the user that the structure has been 'published' and will not undergo any further changes. Fusion Metadata Registry enforces the rule by preventing modifications, with the exception of properties like name and description. However, it is possible to reset a a structure's state back to Non-Final if needed.
Guidance varies on if an when to set a structure to Final.
Global Data Structure Definitions published on the SDMX Global Registry need to be very stable and are therefore set to Final when formally published to indicate consultation and development has finished.
For many other use cases it is permissible for structures simply to be kept as Non-Final.