On 18 mei 2014, at 17:26, Hans Hagen <pragma@wxs.nl<mailto:pragma@wxs.nl>> wrote:

On 5/18/2014 10:05 AM, H. van der Meer wrote:
Sorry if this question reaches you twice, but the first time I used an
email address not registered with this newsgroup.

The short example below typeset with

\usemodule[mathml]
\starttext
\typebuffer
\blank
\processxmlbuffer
\stoptext

and "ConTeXt  ver: 2014.04.04 00:08 MKIV beta" shows that the <mtext>
element does not honour the tags within. This severely restricts the
presentation.



So what makes you think these tags should be recognized and interpreted as being 'bold'?

see: http://en.wikipedia.org/wiki/MathML
Presentation MathML
....

Note however that these token elements may be used as extension points, allowing markup in host languages. MathML in HTML5<http://en.wikipedia.org/wiki/HTML5> allows most inline HTML markup in mtext, and

  *   <mtext><b>non</b> zero</mtext>

is conforming, with the HTML markup being used within the MathML to mark up the embedded text (making the first word bold in this example).

Hans van der Meer