[digiKam-users] Importing xmp data from Lightroom 4.4 to Digikam 5.5.0

[Gilles Caulier]

2018-03-21 9:44 GMT+01:00 Remco Viëtor <remco.vietor at wanadoo.fr>:

> On mercredi 21 mars 2018 08:44:05 CET Gilles Caulier wrote:
> > Hi,
> >
> > I just tested your test photos, and i think i found the reason why the LR
> > metadata are not backported to DK :
> >
> > digikam.metaengine: Exiv2 ( 3 ) :  XMP Toolkit error 101: Schema
> namespace
> > URI and prefix mismatch
> > digikam.metaengine: Exiv2 ( 2 ) :  Failed to decode XMP metadata.
> >
> > These lines are written on the console by Exiv2 library when files are
> > parsed to be registered in database.
> >
> > An XMP namespace is badly defined in Exiv2 (the URI use to identify the
> > namespace). Probably Adobe change the URI as well (which can be a mess).
> > I'm not yet sure. I continue to search.
>
> Are those namespaces defined within Exiv2, or within the XMP files?


Both. Exiv2 know the namespaces :

https://github.com/Exiv2/exiv2/blob/master/src/properties.cpp#L106

And a XMP sidecar data header indicate which namespace will be used. Both
must be identical :

[gilles at localhost Example 1]$ cat IMG_7109.xmp |more
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.5-c002
1.148022, 2012/07/15-18:06:45        ">
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
 <rdf:Description rdf:about=""
   xmlns:xmp="http://ns.adobe.com/xap/1.0/"
<<<< !!!!!!
   xmlns:tiff="http://ns.adobe.com/tiff/1.0/"
 <<<< !!!!!!
   xmlns:exif="http://ns.adobe.com/exif/1.0/"
 <<<< !!!!!!
   xmlns:dc="http://purl.org/dc/elements/1.1/"
<<<< !!!!!!
   xmlns:aux="http://ns.adobe.com/exif/1.0/aux/"
<<<< !!!!!!
   xmlns:photoshop="http://ns.adobe.com/photoshop/1.0/"
 <<<< !!!!!!
   xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/"
<<<< !!!!!!
   xmlns:stEvt="http://ns.adobe.com/xap/1.0/sType/ResourceEvent#"
 <<<< !!!!!!
   xmlns:crs="http://ns.adobe.com/camera-raw-settings/1.0/"
 <<<< !!!!!!
   xmlns:lr="http://ns.adobe.com/lightroom/1.0/"
<<<< !!!!!!
  xmp:ModifyDate="2015-02-21T19:34:28.00"
  xmp:CreateDate="2015-02-21T19:34:28.00"
  xmp:MetadataDate="2016-11-28T10:15:25-05:00"
  tiff:Make="Canon"
  tiff:Model="Canon EOS 7D"
...

Gilles
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