On 21.05.2013 20:14 Eric Lease Morgan wrote: > The convention I have always used included the first word of the author's last name, the first (non-stop) word of the title, and an integer (accession number): > > plato-republic-105.epub It has the advantage of being short but I would like a bit more info, at least publication year and a longer part of the title and the/a ISBN. Perhaps I will just make something up myself. Since I would also like to include the ISBN, is there such a thing like a "main" or "master" ISBN in case a work has more than one of them? I am looking for something like the ISSN-L, but of course for books instead of journals. Something like the reverse of the xISBN service: 'many to one' instead of 'one to many'. If there is nothing like that I might just use the first one given in the book. -Michael