Hi Hans thanks for the checker, that surely helps. So I could find a solution (perhaps not the best) for my problem: \m{T_{\text{½}}} Thanks again Christian 2015-04-17 23:51 GMT+02:00 Hans Hagen :

On 4/17/2015 9:41 PM, Christian Prim wrote:

...

Hi

a year or so before one could simply typeset the physical half-life as shown in MWE:

\usetypescript[palatino] \setupbodyfont[palatino] \starttext ½ α \m{T_α} \m{T_½} \stoptext

The greek letter is just to show, that utf-8 works as expected. In actual beta (and probably longer before) this doesn't work anymore. What have I missed?

Are you sure? palatino doesn't have that character in its math repertoire (it might have been present in the alternative that uses px fonts combined with a pagella text font in which case they're coming from text). The math subsystem of context does to some extend accept super and subscript characters but not (at least not now) these fractions. Is this really needed? It can be done but quite some extra overhead for bad practice.

Anyway, I've added a checker so that at least it gets reported (assuming the use of one math collection):

mkiv lua stats > unknown math characters: ½ (U+000BD) (n=3)

Hans

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On 4/18/2015 11:28 AM, Alan BRASLAU wrote:

On Fri, 17 Apr 2015 23:51:56 +0200 Hans Hagen wrote:

...

Anyway, I've added a checker so that at least it gets reported (assuming the use of one math collection):

mkiv lua stats > unknown math characters: ½ (U+000BD) (n=3)

This will be quite useful.

A question in general for the mailing list: should missing math (and text) characters simply not appear or should some placeholder (such as a box) be rendered in its place? This could help with proofreading.

Nevertheless, having missing characters reported in the log file is a good diagnostic.

we already have \enabletrackers[fonts.missing=replace] % top of file which should show something with \starttext \m{T_α} \m{T_½} \m{T½_½} test \char3211 test \stoptext I've extended that to math so that you will get a placeholder there too (more visible with this option, otherwise a "?" will be used as replacement). Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------