Is it possible to add the function in Calibre to recognize the User-defined keys / Meta Tags?
I'm talking about chapter 3.2.1 in this file:
http://www.adobe.com/content/dam/Ado...ationPart3.pdf
I'm not sure if it is the right topic here, sry for my bad english.
Backround: I have added with "PDF Explorer" many user-defined meta tags to sort my PDF books. But if I add them to Calibre, they are not recognized.