W3C home > Mailing lists > Public > www-math@w3.org > August 2003

Re: cancelling fractions

From: <jpederse@wiley.com>
Date: Wed, 6 Aug 2003 11:02:47 -0400
To: Robert Miner <RobertM@dessci.com>
Cc: www-math@w3.org
Message-ID: <OFAE9C7C66.AE86E288-ON85256D7A.004F129E@wiley.com>


Robert,

Thanks very much for the menclose suggestion. I guess we'll go
 with that, once notation names are decided, although I have a
comment below.

> I have
> long thought this is really the right way to do strikeouts, since it
> is more in line with the MathML philosophy of explicitly binding
> operators to expressions:
>
> <menclose notation="NESWslash">
>   <mrow> ... the expression ... </mrow>
> </menclose>

It could be argued that

    <mrow> expression</mrow><mo>combining mark</mo>

even more clearly shows an operator -- it's a shame in a way
that the combining marks are deprecated (although I understand
the parsing ambiguity reason David points to).

> I haven't thought about the right collection of values for the
> notation attribute, but you would obviously want NESW and NWSE
> slashes.

We would also want a straight horizontal line strikethrough, or is
there an existing way to achieve that?

> If this is very important to you, I might be able to slip it into the
> current MathPlayer development cycle still.  I would be very
> interested to hear what the rest of the list thinks of this as well.

We're not actually using MathPlayer on this content (sorry!),
but others might be grateful for this, and we might in the
future.

Regards,

John.

-----------------------------
John Pedersen
Content Systems,
John Wiley & Sons, Inc.
Received on Wednesday, 6 August 2003 11:02:48 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Saturday, 20 February 2010 06:12:55 GMT