Toolset inheritance

I am working on a new compiler toolset, call it X, which uses another 
toolset, call it Y, to compile/link in order to build the same type of 
targets. The only the slight differences between toolset X and toolset Y 
is centered on the fact that toolset X has its own header files and 
standard library, whereas toolset Y normally used the header files and 
standard libraries of anothewr toolset Z. I am a little bit hazy on how 
toolset inheritance works to achieve what I want to do. I understand I 
can use the toolset.inherit_generators, toolset.inherit_rules and the 
toolset.inherit_flags to inherit these things from Y to X. What I do not 
understand is how to change something toolset X inherits from toolset Y, 
such as a rule, with its actions, or a flag.

Do I just place X's own version of a toolset rule and/or its action in 
toolset X's jamfile to override what is inherited from tollset Y ? If so 
can I replace either the rule or its action independently of each other.

Do I just specify X's own toolset.flags invocation in X's jamfile to 
override some flag X inherited from Y ?

Any help to understand how I can do this would be appreciated.

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