Error - The name "XML" is not legal for JDOM/XML Namespace prefixs

[dmphan2]

Hi Phil,

We have some video files captured by new Sony camera that we ran into this error.  I ran this exiftool command to obtain an XMP file for metadata extraction, programmatically:

exiftool --ZIP:* --Track1:* --PDF:* --XMP-xmpMM:Subject --XMP-photoshop:History --XMP-crss:SavedSettings* --IFD0:ProfileHueSatMapData1 --IFD0:ProfileHueSatMapData2 --XMP-crs:all --ExifIFD:ImageWidth --ExifIFD:ImageHeight -m -X -c "%.6f Degrees" /user/temp/SFF2017_6-29_B-Roll_0006.mp4

Here is a snippet of the output XMP file:

<?xml version='1.0' encoding='UTF-8'?>
<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'>

<rdf:Description rdf:about='/user/temp/SFF2017_6-29_B-Roll_0006.mp4'
  xmlns:et='http://ns.exiftool.ca/1.0/' et:toolkit='Image::ExifTool 10.48'
  xmlns:ExifTool='http://ns.exiftool.ca/ExifTool/1.0/'
  xmlns:System='http://ns.exiftool.ca/File/System/1.0/'
  xmlns:File='http://ns.exiftool.ca/File/1.0/'
  xmlns:QuickTime='http://ns.exiftool.ca/QuickTime/QuickTime/1.0/'
  xmlns:XMP-x='http://ns.exiftool.ca/XMP/XMP-x/1.0/'
  xmlns:XMP-xmp='http://ns.exiftool.ca/XMP/XMP-xmp/1.0/'
  xmlns:XMP-xmpMM='http://ns.exiftool.ca/XMP/XMP-xmpMM/1.0/'
  xmlns:XMP-dc='http://ns.exiftool.ca/XMP/XMP-dc/1.0/'
  xmlns:XMP-xmpRights='http://ns.exiftool.ca/XMP/XMP-xmpRights/1.0/'
  xmlns:XMP-lr='http://ns.exiftool.ca/XMP/XMP-lr/1.0/'
  xmlns:XMP-xmpDM='http://ns.exiftool.ca/XMP/XMP-xmpDM/1.0/'
  xmlns:XML='http://ns.exiftool.ca/XML/XML/1.0/'
  xmlns:Track2='http://ns.exiftool.ca/QuickTime/Track2/1.0/'
  xmlns:Track3='http://ns.exiftool.ca/QuickTime/Track3/1.0/'
  xmlns:Composite='http://ns.exiftool.ca/Composite/1.0/'>
<ExifTool:ExifToolVersion>10.48</ExifTool:ExifToolVersion>
<System:FileName>SFF2017_6-29_B-Roll_0006.mp4</System:FileName>
...

All is good except our java program threw out this error:
Thread-21653 2018-07-16 10:15:10,682 | ERROR | session=423315460 | user=tsuper     | stderr | org.jdom.IllegalNameException: The name "XML" is not legal for JDOM/XML Namespace prefixs: Namespace prefixes cannot begin with "xml" in any combination of case.

Looking at the XMP output, I think this line caused the issue: xmlns:XML='http://ns.exiftool.ca/XML/XML/1.0/'

My question for you is: is there way I can configure Exiftool to use different namespace other than "XML" namespace? I tried to use a custom configuration file but was not successful. My custom configuration file, which I copied from one of your, is listed below:

%Image::ExifTool::UserDefined = (
    'Image::ExifTool::XMP::Main' => {
        myxmp => { # <-- must be the same as the NAMESPACE prefix
            SubDirectory => {
                TagTable => 'Image::ExifTool::UserDefined::myxmp',
                # (see the definition of this table below)
            },
        },
    },
);

# This is a basic example of the definition for a new XMP namespace.
# This table is referenced through a SubDirectory tag definition
# in the %Image::ExifTool::UserDefined definition above.
# The namespace prefix for these tags is 'myxmp', which corresponds to
# an ExifTool family 1 group name of 'XMP-myxmp'.
%Image::ExifTool::UserDefined::myxmp = (
    GROUPS        => { 0 => 'XMP', 1 => 'XMP-myxmp', 2 => 'Image' },
    NAMESPACE     => { 'myxmp' => 'http://ns.exiftool.ca/XML/XML/1.0/' },
    WRITABLE      => 'string',
    Family  => { },
    Genus   => { },
    Species => { },
);
1;  #end

Thank you,
Dewey Phan,
Smithsonian Institution

[Phil Harvey]

Hi Dewey,

This is unfortunate since the -X namespace prefixes are currently hardwired to the ExifTool family 1 group names.

For now, maybe omitting the XML tags from the output would allow you to work around the problem:

exiftool -X --xml:all FILE

But if you really need the XML tags then you'll either have to filter the ExifTool XML output to change the prefix manually (using "sed" for example), or I would need to modify ExifTool to allow this somehow.

- Phil

[dmphan2]

Hi Phil,

Thank you very much for your super fast response!  I do appreciate it. For now, I have to exclude the XML tag like what you suggested in order to process a load of back log video files. If you can modify the code to allow renaming name space option, that would be great.

Thank you again,
Dewey Phan,
Smithsonian Institution

[StarGeek]

Smithsonian Institution

No comment on the problem, I just want to say how freakin' cool it is that the Smithsonian is using your program, Phil.

[Phil Harvey]

how freakin' cool it is that the Smithsonian is using your program, Phil.