What do the filenames of the texts mean?
We have to divide this question into two answers, for books up to 10,000, and books after 10,000 (or older books reposted after we hit 10,000). Books after 10,000 — the new naming scheme Since eBook number 10,000, we name our files based on the PG etext number; thus, the base of the name simply reflects the order in which the book was posted. 12345.txt is just the 12,345th book posted. Also, when we correct an older book, we may repost it into the new naming scheme rather than just replacing it in the old scheme. When we do this, its naming conventions are the same as if it had been numbered after 10,000, and, additionally, we add a subdirectory “old/”, into which we put all of the older files, so that they are preserved for anyone who wants to examine them. In this way, we will eventually move all e-books to the new naming scheme. Formats or character sets other than plain ASCII then get extensions added to indicate the type of file. Character sets get digits; formats get letters. Th
