Annotation synchronization

Hello,

I’m stuck at trying to get the necessary information for a synchronization file (the XML with and that the PDFTron Web Server waits for) that the ToolManagerDelegate provides, which is a single PTAnnot object with the page (pageNumber) that the event occurred.

Is there a known way to do such thing? (creating a differences XML on the iOS SDK that the PDFTron Web can interpret and merge accordingly)