On 31 Jan 2018, at 17:40, Wolfgang Schuster <schuster.wolfgang@gmail.com> wrote:

[…]

Add “strip=yes” to remove spaces around the cells.

\defineseparatedlist
[seplisttalk]
[separator={;},
command=\maketalk,
strip=yes]

Thanks again, but I wonder where did you find this trick?… in i-context.pdf there is no entry for \defineseparatedlist…