Don't know enough about that part myself, the best would be to read about it here:

https://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/PDF32000_2008.pdf

Tilman

Am 29.12.2015 um 09:34 schrieb Zheng Lin Edwin Yeo:
Thanks for your reply Tilman.

Would like to find out, is the content extraction issue of this caused by the Identity-H encoding?

Regards,
Edwin


On 21 December 2015 at 16:12, Tilman Hausherr <[email protected] <mailto:[email protected]>> wrote:

    Am 21.12.2015 um 04:08 schrieb Zheng Lin Edwin Yeo:
    Thanks for your reply.

    I tried on Adobe Acrobat Pro DC, it is able to open the file, but if open
    on Adobe Reader then it is not able to extract all the text properly.

    Is there anyway which we can check what type of encoding is used for the
    PDF files?

    Yes, in the font dictionaries, as you can see from this screenshot:



    However this won't get you the text, obviously.

    Tilman

    Regards,
    Edwin




    On 19 December 2015 at 03:07, Tilman Hausherr<[email protected]> 
<mailto:[email protected]>  wrote:

    Am 18.12.2015 um 18:57 schrieb Zheng Lin Edwin Yeo:

    I've shared one of the file with the issue on dropbox, which you can
    access
    via the link here:
    https://www.dropbox.com/s/rufi9esmnsmzhmw/Desmophen%2B670%2BBAe.pdf?dl=0

    Adobe Reader is also unable to extract text.



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