Manuel Mall wrote:

Currently if one puts a zero-width-space (U+200B) into an XSL-FO file (or specifies linefeed-treatment="treat-as-zero-width-space") it is rendered as a "missing character" in PDF. Is that correct, i.e. does this character have to exist in the font used or should the formatter or renderer simply remove this character? It is the second approach that both AntennaHouse and RenderX appear to have chosen.

I recommend that no character is output for a ZWS. The whole purpose of placing a ZWS into the input XSL-FO is to give layout an extra break opportunity, without changing the appearance of the generated document.


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