Unicode in PDF

Question

My program generates relatively simple PDF documents on request, but I\'m having trouble with unicode characters, like kanji or odd math symbols. To write a normal string in

Answer 1

I'm not a PDF expert, and (as Ferruccio said) the PDF specs at Adobe should tell you everything, but a thought popped up in my mind:

Are you sure you are using a font that supports all the characters you need?

In our application, we create PDF from HTML pages (with a third party library), and we had this problem with cyrillic characters...