🚀 go-pugleaf

> But Indesign breaks lines after both of them regardless of the hyphenation setting

I don't think it does, unless IDCS3 has changed this. I may be wrong, and I do recall some discussion about how different versions of ID handled URLs when it came to breaking them, but my quick trial shows that IDCS2 doesn't break after the forward or back slash. It will, of course, break if you're putting spaces around them, but then you can use U+00A0. Note, however, that these NB spaces will not flex with justification, so the best approach is to use a normal space with a no-break attribute. Because you don't want manual intervention, I assume you're importing from a database or from some source and you want it all precoded. Can you code to include a no-break character style around the spaces?