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Re: unrecognized actiontype in maction

From: David Carlisle <davidc@nag.co.uk>
Date: Tue, 29 May 2012 10:13:16 +0100
Message-ID: <4FC4932C.9030908@nag.co.uk>
To: Andrii Zui <prazuber@gmail.com>
Cc: www-math@w3.org
On 28/05/2012 17:17, Andrii Zui wrote:
> Hello everyone!
> While working on my summer project with MathML maction, there was
> discovered an uncertainty in the REC. In section
> <http://www.w3.org/TR/MathML3/chapter3.html#id.> it says:
> By default, MathML applications that do not recognize the specified
> actiontype should render the selected sub-expression as defined
> below.
> and then it goes on to describe the actiontype attribute and the
> effect of the selection attribute.
> The question is, how to deal with the selection attribute when we get
> an unrecognized actiontype? Should the selection attribute on maction
> be considered by default?
> -- Andrii Zui

I think that is fairly unambiguous that "the selected sub-expression as
defined below" means "the child specified by the selection attribute"
so yes, my reading is that the selection attribute should always be
used, and if it refers to a missing child then that is an error.

[personal response not checked with WG]

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Received on Tuesday, 29 May 2012 09:13:51 UTC

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