
: Re: How to adapt annotations from an old edition book to a new edition book? I like to write notes on ebooks for reorganizing the topics and for helping with my understanding. One question which
This is a very interesting question, and I did some preliminary research on it.
The basic problem here is that PDFs are generally not considered to be an editable document and that most annotation solutions are specific to one software platform.
Because PDFs are considered to be more as output than an editable document, versioning hasn't really been implemented for the annotations.
I am not particularly well-versed in the Adobe platform, but I know that some mobile PDFs readers let you export annotations to a text file. (Several can do this).
Some other options are to do the annotations and versioning in MS Word and/or Google Docs instead of PDF. Those are both good for storing annotations and keeping track of versions. Also, both software have all sorts of mobile apps and syncing solutions.
Here's an interesting thing. If your file is an epub and if you have uploaded it to Google Play Books (GPB), then when you annotate the epub file, the annotations will be stored in a (versioned) Google Docs file for your account. (Here's what one of my files looks like: docs.google.com/document/d/1FvqqixSaZoY04Ua2L6wTK1mHmU5UptYISZ4z4oFSd1I/edit?usp=sharing )
Another possibility is to search through the available plugins for Google Docs or MS Word to see if there are plugins (free or commercial) which let you version comments better.
I realize that this is not the solution you want, but those are the solutions I am aware of.
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