Hans van der Meer schrieb am 04.03.2020 um 13:23:
>> On 3 Mar 2020, at 22:04, Rik Kabel <context@rik.users.panix.com 
>> <mailto:context@rik.users.panix.com>> wrote:
>>
>> Instructions for creating the .epub from the export are contained in 
>> the log file.
>
> In the log comes:
>     create epub with: mtxrun --script epub --make "kookboek" --purge 
> --rename --svgmath
> This I did.
>
> The log gives:
>  adding: mimetype (stored 0%)
>   adding: META-INF/ (stored 0%)
>   adding: META-INF/container.xml (deflated 32%)
>   adding: OEBPS/ (stored 0%)
>   adding: OEBPS/nav.xhtml (deflated 49%)
>   adding: OEBPS/images/ (stored 0%)
>   adding: OEBPS/kookboek.opf (deflated 65%)
>   adding: OEBPS/styles/ (stored 0%)
>   adding: OEBPS/styles/kookboek-styles.css (deflated 35%)
>   adding: OEBPS/styles/kookboek-defaults.css (deflated 80%)
>   adding: OEBPS/styles/kookboek-images.css (deflated 7%)
>   adding: OEBPS/cover.xhtml (deflated 38%)
>   adding: OEBPS/kookboek-div.html (deflated 67%)
>   adding: OEBPS/toc.ncx (deflated 53%)
> mtx-epub     | epub archive made using zip: kookboek.epub
>
>
> But, the resulting epub is bad. Compare the output as pdf with the 
> output as epub and it is immediately clear that something is wrong in 
> the production of the epub. See also the corresponding -raw.xml. 
> Unless I am making a gross mistake.

You make things easier when you show your TeX file.

Wolfgang