> On Sep 9, 2025, at 8:26 AM, Rob Wilton (rwilton) 
> <[email protected]> wrote:
> 
> Deliberate, perhaps, but wrong, imo :-)
>  I don’t think that using leaves instead of leafs would have affected clarity 
> of the text.  Perhaps if leaf was an acronym for something else using a 
> different plural would have been justified.

I agree and the usage of "leafs" has a tendency to break one's train of 
thought.... 

Thanks,
Acee


> 
> Even copilot thinks that we should be using leaves, and I’m not aware of 
> other cases in general computer science literature on data structures that 
> use leafs rather than leaves.  It seems to just be a YANG thing …
> 
> Kind regards,
> Rob
>   From: Jan Lindblad <[email protected]>
> Date: Saturday, 6 September 2025 at 23:22
> To: Andy Bierman <[email protected]>
> Cc: NetMod WG <[email protected]>
> Subject: [netmod] Re: leafs
> Andy,
>  I can assure you this is completely intentional. IMHO this is a 
> misunderstanding based on the false assumption that a biological tree leaf == 
> datastructure YANG leaf. These are two different kinds of concepts that 
> happen to have the same spelling of one of their grammatical forms, but are 
> actually different words that conjugate differently.
>  This kind of differentiation makes sense in (computer) science text, since 
> adhering to traditional grammar rules would often make technical text less 
> understandable/precise. In Python we talk about trys, defs, ifs and elses. In 
> YANG discussions we often talk about when constructs in such a way that half 
> a page turns red with wavy grammar underlines. And we aren't going to 
> titlecase the names of symbols in the documentation just because english 
> grammar requires it. Imagine a man page about Fopen() or Str() or Show 
> Interfaces.
>  Best Regards,
> /jan
>  It was pointed out to me that RFC 8407bis spells the word "leaves" 
> incorrectly (15 times).
> My answer was that it is trying to be consistent with RFC 7950 (31 times), 
> which started
> in RFC 6020 (27 times).
>  Does anybody remember why the WG went with an incorrect plural of "leaf" in 
> RFC 6020?
> Obviously, it cannot be changed now, but maybe this was intentional, and the
> reasoning is documented.
>  From google:
>  Note: "Leafs" is sometimes used as the plural form in proper nouns, such as 
> the Toronto Maple Leafs hockey team, but it is not the general plural of the 
> noun "leaf".
>   Andy
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