Re: [MathML4] Deprecation/Removal of the mfenced element

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From: =?UTF-8?B?RnLDqWTDqXJpYyBXQU5H?= <[email protected]>
To: Stephen Watt <[email protected]>
Cc: "[email protected]" <[email protected]>
Message-ID: <[email protected]>
Subject: Re: [MathML4] Deprecation/Removal of the mfenced element
References: <[email protected]>
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Le 26/07/2016 =C3=A0 00:00, Stephen Watt a =C3=A9crit :
> I see your point, but have to say that I am not really satisfied with
> the current spec language regarding equivalence.     Mfenced can also
> give information about grouping that is lost with the mrow
> formulation, e.g. an mrow containining [a, b [ f ] d, e]   may be a
> list of three things or a pair of half open intervals with an f in the
> middle.
So the only thing you are saying is that expanding to plain text without
explicit grouping implies loss of information compared to using mfenced.
That's true, but that's not my point. If you really follow the expansion
rules in MathML3 instead of using plain text then you see that nothing
is lost in your example and that the mfenced element is again useless.

Certainly, one can write <mo>+<mrow> without proper grouping as that's
unfortunately often the case for markup generated from text
representation like TeX or ASCII. But the existence of an mfenced
element in MathML does not magically force converters or people to do
this grouping.



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