tedster - 3:46 am on Nov 28, 2012 (gmt 0) [edited by: tedster at 3:38 pm (utc) on Nov 29, 2012]
Google also obeys wild card pattern patching in a robots.txt file, even though that syntax was not part of the original robots.txt standard. This means you can use:
1) The asterisk character [*] stands for any number of characters including directory names.
2) The dollar sign character [$] stands for "end of the character string".
This approach disallows any pdf file no matter which directory holds it, and also guards against any accidental use of the character string ".pdf" in a file path other than an actual PDF file.
If you block the bot from crawling files via "robot.txt" will G ever count those towards the quality score of your site?
If the files are not even crawled, then they cannot be directly evaluated for quality.
[edited by: tedster at 3:38 pm (utc) on Nov 29, 2012]