[NTG-context] TeX markup in \setupinteraction for PDF metadata fields

Hi, Is it possible to have TeX markup executed in the text fields for \setupinteraction? I would like to do something like: \definemarking[xyz] \marking[xyz]{Hello} \setupinteraction[state=start] \setupinteraction[title={\getmarking[xyz][current]}] \setupinteraction[author={\getmarking[xyz][current]}] \starttext xyz=\getmarking[xyz][current] \stoptext But my generated PDF has literally "\getmarking[xyz][current]}" for the title and author. Thanks, -- Kate