When you are writing a specification, it might happen that you are not sure about Extensibility of your specifications. Extensibility can cover many meanings at the same time.
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Does that mean you create a specification which can accept new features, extensions. This can be done
- with a precise defined mechanisms.
- or without mechanisms.
How extensibility appears in specifications?
It can be because of the definitions of features because of the
- behaviour of implementations (you don't have a specific answer)
- specific implementations (for example, black and white screen versus color)
- uncertainty on the features advantage
- future needs.
So If you want to create extensibility you might need to define a precise mechanism to do that
- Examples in the W3C Specs? Pbs and Advantages.
- Examples outside W3C Specs?
- Benefits and Risks for Developpers?