[gutvol-d] roundtripping formatted text through a .pdf

recently i've worked on "roundtripping" styled z.m.l. text through a .pdf. my viewer-program can write z.m.l. text to a .pdf such that copying the text out of the .pdf gives a user the same text that went in. make a few global changes -- which restores the whitespace acrobat usually strips from text -- and you can load the text back into my z.m.l. viewer-program and generate the same .pdf once again... the proof is in the pudding, and the structure is in the presentation. that is _not_ something you can do with text that's copied out of a .pdf created with other programs i know. generally, the .pdf format is known as the "roach motel" of file-formats -- content goes in and can't get out... :+) -bowerbird