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user_none · 02-08-2011, 08:02 PM

goaspy has sent me a the book and apnx file that he was looking at.

Here's what I've figured out so far:

The file starts with

Code:

{"contentGuid":"8d3d16e0","asin":"B002RHGYOA","cdeType":"EBOK","fileRevisionId":"1296868639127"} ) = {"asin":"1906694184","pageMap":"(4,a,1)"}

contentGuid is most likely just a guid used to differentiate the file from others.
The first asin is the amazon asin for the Kindle version of the book.
cdeType is a Mobi document type specified as ebook. I haven't played with it much but I'm going to assume this is important. The 3.1 update looks to have a new navigation system for periodicals. Most likely the apnx will have a different meaning (but same format) depending on the cdeType.
fileRevisionId should be obvious.
The second asin is the isbn for the paper back version of the book.
Don't know what pageMap does yet.

Following this header is a list of 4 byte sequences of big endian ints. They are in an increasing order. The total number of the 4 byte sequences is 573. The first 3 ints are all 0 which leads me to believe they are padding. The total number of pages within the book are 570 (as shown on the Kindle itself). I need to do some testing but it looks like my assumption is correct and the apnx file is a list o file locations where each is the beginning of a new page.

02-08-2011, 08:02 PM	#13
user_none Sigil & calibre developer Posts: 2,487 Karma: 1063785 Join Date: Jan 2009 Location: Florida, USA Device: Nook STR	goaspy has sent me a the book and apnx file that he was looking at. Here's what I've figured out so far: The file starts with Code: {"contentGuid":"8d3d16e0","asin":"B002RHGYOA","cdeType":"EBOK","fileRevisionId":"1296868639127"} ) = {"asin":"1906694184","pageMap":"(4,a,1)"} contentGuid is most likely just a guid used to differentiate the file from others. The first asin is the amazon asin for the Kindle version of the book. cdeType is a Mobi document type specified as ebook. I haven't played with it much but I'm going to assume this is important. The 3.1 update looks to have a new navigation system for periodicals. Most likely the apnx will have a different meaning (but same format) depending on the cdeType. fileRevisionId should be obvious. The second asin is the isbn for the paper back version of the book. Don't know what pageMap does yet. Following this header is a list of 4 byte sequences of big endian ints. They are in an increasing order. The total number of the 4 byte sequences is 573. The first 3 ints are all 0 which leads me to believe they are padding. The total number of pages within the book are 570 (as shown on the Kindle itself). I need to do some testing but it looks like my assumption is correct and the apnx file is a list o file locations where each is the beginning of a new page.