You can find information correlating to your needs below:
- Extracting annotations/comments from attachments
You would need to extract each file from the PDF, then you could extract the comments and annotations as you did the original file.
Extract Embedded Images from PDFs with SDK | Apryse attachment annotations
This is also how the Multi-Tab Support Demo extracts the comments from the attachments.
We have a workflow that extracts just the comments from the file, found in the following page:
https://community.apryse.com/t/how-do-i-get-all-the-annotation-comments-so-i-can-get-them-as-plain-text/
- Combining into one XFDF file
We don’t provide this functionality in the current version of the Apryse SDK.
If you are still having troubles with this, could you please provide me with the sample file that you are currently working with?
Please let me know if you need anything else regarding this at this time.
Thanks,
Daniel House
Apryse Support