Re: UTF-8 compatibility of digiKam's metadata

Posted by Gilles Caulier-4 on Jan 21, 2008; 3:34pm
URL: http://digikam.185.s1.nabble.com/UTF-8-compatibility-of-digiKam-s-metadata-tp1711225p1711226.html

2008/1/21, Gerhard Kulzer <[hidden email]>:

Is anybody in this room who feels confident to make a statement on digiKam's
compatibility with UTF-8 encoding. I know there have been a lot of mail
exchanges, most of them I read. But in the end I was a bit lost.

This concerns captions (comments)

For JPEG, Caption is stored in JFIF Comments section, as a byte array (warning: this is not EXIF/IPTC/XMP). There is no standard to store encoding in this area but digiKam use UTF-8 to format byte array contents.

For Exif, we have :

Exif.Photo.UserComment ==> stored as Byte array with charset text header ==> ASCII if this is enough, or Unicode (USC2 not UTF8) if necessary ==> this deapnd if Qt can convert string to write as ASCII. If no, Unicode is used ( http://en.wikipedia.org/wiki/UTF-16/UCS-2).

For IPTC ==> ASCII. Patch to support UTF-8 not yet complete on my computer. In fact this one will be obsolete with XMP...

For XMP ==> always UTF8 !!!
 

and tags

With IPTC ==> ASCII
With XMP ==> UTF-8
 

Note : XMP support is full implemented in digiKam for KDE4

, all in IPTC and XMP.
I can't see that EXIF is concerned, right?

look my previous comment about...

Gilles

_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel