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Is there a way to denote a paragraph break in the OpenType Feature Definition Language?
The paragraph break as such (not the pilcrow _glyph_, that is, but the _character_, so to speak), has no code point in the font, but is implemented through and handled by the text processor or text setting engine. So, unfortunately, I don't see a way to incorporate it in an OpenType feature.
It might be very useful to have this, though; one may want to have for example end swashes only at the end of a paragraph.