On Wed, 2 Nov 2005 01:03 am, Chris Bowditch wrote:
> 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.
That seems to be the consensus, that is consider ZWS for line breaking 
but then discard and don't give it to the renderers.

Are there any other (unusual Unicode) characters which fall in the same 
category that is they influence layout decisions but should not be seen 
by the renderers?

> Chris


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