I'm creating a Stock Photo gallery on WordPress with PhotoPress Image Taxonomies by Peter Adams and I noticed that when I upload photos from iStockphoto, the taxonomies keyword is filled with tags that it originally have on iStockphoto site. I tried doing this on Windows using the tagging feature on windows photo gallery and also on the properties of the image itself but it doesn't appear like that of the image on iStock photo.
By the way, this is not a commercial project but an internal for the company to use.
So how is iStock photo embedding their keywords on their photo that the plugin by Peter Adams is reading? This will obviously make tagging much easier because when you do tagging on Windows Photo Gallery, you can do it by bulk that WordPress is not able to do.