[Digikam-devel] [Bug 268688] Write metadata to all images does not remove obsolete tags

[Gilles Caulier]

https://bugs.kde.org/show_bug.cgi?id=268688





--- Comment #3 from Gilles Caulier <caulier gilles gmail com>  2011-03-17 12:48:07 ---
ok. 

I will explain better indeep. Tags are stored in many places :

1/ IPTC keywords (name only, not path)
2/ XMP keywords (name only, not path) = IPTC keywords without ASCII char and
strings size limitations 
3/ XMP digiKam namespace : full tag path.

For 1/ and 2/, they contents full history, and not reflect the exact database
contents. Typically old keywords can be still assigned to image.

For 3/, it's THE dedicated place to store digiKam tag paths from database. This
must be the exact copy of DB for backup. It's this point which is not fine
currently. It's the current problem.

NOTE : what's keywords and tag paths :

for a digiKam tag as "City/Paris/Monuments/Seine/Events" with "City",
"Monuments", and "Events" assigned to and item

=> Keywords are : "City", "Monuments", and "Events"
=> Tag Paths are : "City", "City/Paris/Monuments", and
"City/Paris/Monuments/Seine/Events"

If this item is imported to a new computer with digiKam, by priority, tags will
be created in database using :

1/ XMP digiKam namespace
2/ XMP keywords
3/ IPTC keywords

Gilles Caulier

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