It is great to see this discussion.
I don't disagree with any of the valuable comments made but would say
from my own perspective being concerned with digital preservation that,
like the TEI, I lean towards "openness" and closely coupling metadata
(such as in the TEI header) with its referent. Also I distinguish
between the preservation format and any publication or dissemination
Hence in respect of images I am implementing an XMP(1) based solution
with a PNG(2) image preservation format. The XMP allows me to embed
metadata concerning the individual image in the image file.
Sadly as yet there is a shortage of tools to help so work is at proof of
concept demonstration level using Perl hacks.
Since I also promote TEI for preserving text where there is a need for
processing in future (as opposed to mere rendering) then I would be
delighted to see solutions for text/image integration.
(1) XMP - extensible metadata platform, see adobe.com
(2) PNG - portable network graphics
> Dear TEI-L,
> I am organizing a small image-based project, involving the digital
> publication of a Russian festal icon with commentary. The icon
> contains 27 small images of church events (Annunciation, Nativity,
> etc.), arranged on the board much like a comic strip (an example of
> this type of icon is available at
> http://www.dormitionskete.org/DsWebStore/images/DsProducts/MS-FD-Cretan_org.gif). I would like the electronic edition to include photographs of the icon as a whole and of each of the small images, with textual information attached at both levels.
> I don’t have much experience with descriptive metadata for image
> files, or, for that matter, with image resources in general, and I’d
> be grateful for any information anyone might provide about 1) image
> formats (I envision something high quality for archival purposes and
> lower-resolution for web delivery--but I don’t know what resolutions,
> color depths, file formats, etc. are consistent with what
> professionals regard as best practice) and 2) descriptive metadata
> (whether art historical, photographic, or other--again, in a way that
> is consistent with professional best practice). I’d also welcome
> pointers to similar projects others might have developed, exposure to
> which might broaden my understanding of what’s possible and what’s
> The TEI guidelines don’t seem to deal with this type of project
> explicitly, which is reasonable, since it is not fundamentally a “text
> encoding” activity. Nonetheless, I suspect that many readers of TEI-L
> have dealt with these issues, and I’d be grateful for any advice or
> suggestions. I have poked around on the web in search of metadata
> standards for images, but those resources don’t give me a good sense
> of what people are doing in actual projects.
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