image browser and JPEG comments

[neil woolford]

> 
> What are IPTC tags exactly? What do they offer that JPEG comments do
> not? Seems redundant to me, I am probably missing something there.

They're bigger and better, with a format that can hold much more
information relevant to picture use and cataloging.  They were developed
for press work, see http://www.iptc.org/pages/index.php
There are new enhanced versions coming on now in association with Adobe.

EXIF in jpegs holds lots of information about camera settings and a
little free form comment data.  Great for technical nerds wondering how
sharp their lenses are at a given aperture, useful to smart
photoprinters which can adjust themselves according the camera program
used for the shot, not good for trying to catalogue or automate workflow
and image retrieval.

Neil


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