[okular] [Bug 385015] Okular does not show XMP metadata for PDFs

[Paul Millar]

https://bugs.kde.org/show_bug.cgi?id=385015

Paul Millar <paul.millar at desy.de> changed:

           What    |Removed                     |Added
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                 CC|                            |paul.millar at desy.de

--- Comment #5 from Paul Millar <paul.millar at desy.de> ---
At the risk of pointing out the obvious, XMP is a standard way of expressing
metadata that may be embedded in more than just PDF. 

https://en.wikipedia.org/wiki/Extensible_Metadata_Platform

Of the file formats Okular supports, TIFF, JPEG, PNG, GIF and WebP support
embedding XMP metadata.  In addition, XMP metadata might be provided as a
sidecar metadata file; e.g., the file "my-file.xmp" for the main file
"my-file.cbr".

To me, this suggests that a generic XMP-viewer might be useful, as it could
support multiple files.  The PDF plugin would support extracting the XMP
metadata, with other file-format-specific plugins would do likewise.

It might even make sense for this support to be library code, as other software
needs XMP support.  As an example, the DigiKam project has (or claims to have)
support for XMP:

https://userbase.kde.org/Digikam/Metadata

My own interest is in viewing the complete XMP metadata information, rather
than a limited subsection of it.  (I think Timo is interested only in the
Dublin Core terms.)  Viewing the XMP metadata simply as (pretty-printed) "raw"
XML would probably be sufficient for me.

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