marto -

Thanks for your extremely helpful post ... and apologies for not having responded to it any earlier. My experience was exactly the one clinton describes in the thead you reference: modules like CAM-PDF only produce mildly helpful output. I am very grateful for the reference to the Linux tool pdftotext. With the option -htmlmeta it produces extremely useful, tagged output from a given PDF. This is precisely what I have been looking for in a long time. I will intensify my efforts related to this utility from now on.

Thanks again!

Pat