Question about PDF manipulation

Jan-Benedict> You didn't answer my question:-) Consider I prepare a Jan-Benedict> TIFF file that contains (with additional tags) eg. some Jan-Benedict> raw OCRed text, not read-checked. Now I preapre a PDF Jan-Benedict> from this and use gs to get the image back. Is my text Jan-Benedict> still there? Or do I get an image that "looks" almost Jan-Benedict> the original, but doesn't contain my extra-data? Oh. I didn't know TIFF could do that; I certainly would never store text in a TIFF file, no more than I would store images in a DOC file. I have no idea what would happen. Keep in mind that PDF is a close relative of PostScript. PostScript does a nice job of describing bitmap images of any form a commercial printer is ever going to encounter, but it's not a universal meta-everything storage format. PDF also is meant as a final form document encoding. So I would expect images to come through exactly as they were, but random embedded non-image content may well disappear. I suppose you could run the experiment and report back... paul