> Wolfgang,
>
> Thanks for the suggestion. However, I'm using ConTeXt to typeset arbitrary
> XML input from users (and therefore arbitrary image filenames). While your
> idea works for the two examples that I gave, it doesn't work if the curly
> braces aren't balanced in the filename (e.g., "flower{1.jpg"). Is there any
> general character escaping mechanism for macro arguments?
>
> Cheers,
> Mike
If you use xml as input format you could save the file name in a temporary
macro and use this macro now in the \externalfigure command. You already
gave a example for this.
Wolfgang
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