Updated: 8:45pm EDT, 10 September 2011 (changes highlighted in orange).
Updated: 10:43am EST, 20 December 2011 (some of what's here is now superseded by recent developments; see further this new post: Pleiades, Flickr, and the Ancient World Image Bank)
Pleiades Machine Tags
Pleiades is a collaborative, open-access digital gazetteer for the ancient world. AWIB is an open-access publication that uses the Flickr photo-sharing site to publish free, reusable photos of ancient sites and artifacts. Machine tags are an extension to Flickr's basic tag-this-photo functionality that "use a special syntax to define extra information about a tag" (Aaron Straup Cope, "Ladies and Gentlemen: Machine Tags," 24 January 2007).
A Pleiades machine tag looks like this:
pleiades:place=795868where 795868 is the stable identifier portion of a Pleiades Uniform Resource Identifier (URI). In this example, the URI corresponding to the machine tag above is:
What Pleiades Machine Tags Are Good For
The Flickr API makes it possible to request lists of machine-tagged photos in the RSS webfeed format. So, to get a list of all photos in Flickr that are tagged with the example machine tag above, pop this into your feed reader:
The same results can be viewed in HTML in a browser by resolving the following:
The same results, viewed in HTML on the Flickr site:Networked Blogs or Twitterfeed to pass on the latest changes to your Facebook friends or Twitter followers. If you've got a web-facing numismatic database that you've already linked up with Pleiades for the mint locations, you could write custom code to pull a corresponding picture of the ancient site into your web interface (say, alongside the map you've already got).
Add Pleiades Machine Tags to Your Own Photos on Flickr
Many of you have been taking amazing photos of ancient sites and artifacts for years. Many of you have posted some of them to Flickr and shared them with great groups like Chiron, Visibile Parlare - Greek Inscriptions and Visibile Parlare - Latin Inscriptions. If you'd like these photos to appear in queries and feeds (like those described above), right alongside the photos that we're publishing via AWIB, all you have to do is add the appropriate Pleiades machine tags in Flickr. Just look up your site on Pleiades, copy the numeric ID from the URI in your browser's location bar, append it to the string "pleiades:place=" and tag your Flickr photos with it. In this way, you can help us improve findability of good photos of ancient sites and the artifacts found there for everyone on the web. Who knows ... maybe enough people will join us in this effort that we can someday get the Flickr development team to give Pleiades machine tags some extra love.
- Aaron Straup Cope for his blog post "Wildcard Machine Tag URLs" (18 July 2008) that showed me how to construct the API queries necessary to get the RSS feeds described above. That, and the Flickr API documentation on feeds.
- Nate Nagy, Managing Editor of AWIB, who applies the tags and keeps AWIB rolling.
- Dan Pet, from the Portable Antiquities Scheme, and Ryan Baumann, from the Center for Visualization and Virtual Environments at the University of Kentucky, who put me onto machine tags in the first place and helped me get up to speed.