[NTG-context] Can itemize calculate optimal label widths?

Hi all! Is there a possiblity to have itemize calculate the optimal label width itself? I have an itemize that has rather different labels, e.g.: \startitemize \sym{1.} An item \sym{2.} Another item \sym{103 a.} An item with a very broad label \stopitemize In this example the label "103 a." flows into the item text. It would be great if itemize would automatically use a label width that fits the broadest label. Thanks for your attention, --Stefan