But what is the advantage? Its not less work in the kernel, and in user-space 
you need to write a parser for this. You would have made a new format for 
hierarchical data that no one else uses only to avoid using XML in the 
kernel. 
> Is one level enough? I'm currently offline so didn't check the sample
No, for example for USB you have the levels 
devices/configurations/interfaces/endpoints. 
bye...
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