I believe those characters you are thinking of as superscripts in the pdf document are actually just regular characters being displayed in a different font and different baseline. See this short discussion from stackoverflow. So you won't be able to get all the information into the plain text, instead you'll have to somehow encode the proper font formatting to send along with the text. Presumably the 'font' method in RTF::Writer might help do the job. But other monks may have better ideas.

In reply to Re^3: print comma in superscript by farang
in thread print comma in superscript by qingfengzealot

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