View Full Version : Possibly dumb question: is ADE the same as Epub?


garygibsonsf
12-13-2009, 04:57 AM
I found some ebooks on Powells.com that I can't find anywhere else but want. They're availabe as 'Adobe Digital Editions' but I can't work out for the life of me if that's epub, pdf, or some other format. Or both? Does anyone know?

HarryT
12-13-2009, 04:59 AM
It could be either ePub or PDF - both use ADE for encryption. All that I can really suggest is that you ask the bookstore which of the two formats it is.

wallcraft
12-13-2009, 09:19 AM
In most ebook stores "Adobe Digital Editions" means PDF. Powells.com makes it even more confusing by using "Adobe Digital Editions ePub" and "Adobe Digital Editions ACS4". It appears that the ACS4's are PDFs. In general, if it does not say ePub assume PDF.

HarryT
12-13-2009, 09:23 AM
In most ebook stores "Adobe Digital Editions" means PDF. Powells.com makes it even more confusing by using "Adobe Digital Editions ePub" and "Adobe Digital Editions ACS4". It appears that the ACS4's are PDFs. In general, if it does not say ePub assume PDF.

"ACS4" is "Adobe Content Server v4", which is the current release of Adobe's DRM server. That alone, though, is no help in knowing what the format is, since ACS4 can "serve up" both ePub and PDF files.

garygibsonsf
12-13-2009, 09:29 AM
"ACS4" is "Adobe Content Server v4", which is the current release of Adobe's DRM server. That alone, though, is no help in knowing what the format is, since ACS4 can "serve up" both ePub and PDF files.

I went back and searched around and finally found the 'ACS4' specification at the bottom of a page, so it's PDF, which is annoying. I wouldn't even have known what it was if someone hadn't mentioned that term.

JSWolf
12-13-2009, 09:41 AM
I agree 100% with wallcraft. If you do not see the eBook being called ePub, assume it's not and move on. I've never seen ePub no called ePub. But PDF can be called all kinds of incorrect things.

wallcraft
12-13-2009, 10:10 AM
"ACS4" is "Adobe Content Server v4", which is the current release of Adobe's DRM server. That alone, though, is no help in knowing what the format is, since ACS4 can "serve up" both ePub and PDF files. I agree that Powells isn't using a sensible name for these ebooks, I have no idea why they don't just say PDF. I spot checked a couple of "ACS4" titles at a search site, and they were PDFs.

As another example, Books on Board uses "Adobe Digital Editions" and "Adobe ePub". They say that "Adobe Digital Editions" might either be PDF or ePub (i.e. the publishers don't distinguish the format), but in my experience it is always PDF.