So far this "spec" seems to be primarily a legend.

Is it documented anywhere?

On Fri, Mar 19, 2010 at 5:09 PM, Al Haines (shaw) <ajhaines@shaw.ca> wrote:
Jim, the material below describes the scanset naming standard used by PG. For an example, go to http://www.gutenberg.org/etext/25896, click on the Base Directory link at the bottom of the book's catalog info, above the actual files.  You should see a 25896-page-images folder.  Click on it to see the actual files.

Al



Basic format:

The prefix for the cover pages is: "c".
The prefix for the roman pages is: "f".
The prefix for the arabic pages is: "p".

***

For blank pages there should be no file and the page number should be
skipped. Optionally an image saying: "This page is blank in the
original." may be inserted.

***

Example of file naming:

 front cover      c0001.png
 back cover       c0002.png
 spine            c0003.png

 i title page     f0001.png
 ii title verso   f0002.png
 iii dedication   f0003.png
 iv is blank
 v contents       f0005.png

 page 1           p0001.png
 page 2           p0002.png
 image on page 2  p0002-image1.png
 image on page 2  p0002-image2.png
 page 3           p0003.png
 page 4 is blank
 page 5           p0005.png
 ...              ...
 page 9999        p9999.png