The labeling is part of a pilot project by the U.S. Library of Congress, which is making 3,115 of its archival photos available for public tagging in an attempt to bring a sort of "wisdom of the crowds" intelligence to the photos' metadata.
For now, the library is making two distinct groupings available on the popular photo-sharing site: "1930s-40s in Color" and "News in the 1910s." The former is filled with images of World War II-era industrial scenes and military personnel posing in full-dress uniform. The latter contains equally stunning shots of random ball players, barns, yacht clubs, and more.
The Commons is Flickr's attempt to showcase and add context to the archives of public-facing institutions--first the Library of Congress and later potentially others, such as museums or other civic entities.
"I'm interested in whether this can establish the usefulness of the folksonomic approach, in combination with the expertise and curatorial skills that these institutions hold," said George Oates, program manager for The Commons at Flickr. "I don't know what the future looks like, but I do know that there's a lot of interest in the museum industry about this...approach."
For now, though, The Commons is going to focus exclusively on the library's archives. One notable aspect of the project is the addition of a new Flickr copyright category in which the photos are said to have "no known copyright restrictions."
It might be tempting to read that designation as equating to "public domain," but that's not the case, say those driving the initiative at the Library of Congress.
"It's always incumbent on a user of any work to do their own due diligence" about copyright, said Matt Raymond, a public-affairs officer at the library. (The public can visit the library's Prints and Photographs Web page for an FAQ on the specifics of copyright issues pertaining to the images in The Commons project, as well as to any of the millions of other images in the library's archives.)
It may eventually be possible for the general public to submit photos to The Commons project, Oates suggested, but for now, Flickr will limit participation to public or civic institutions.
As a result, the public will have to continue using the previously existing copyright designations Flickr offers, such as "some rights reserved," "all rights reserved" and assorted licenses available under Creative Commons.
Regardless of the copyright issues involved, the library and Flickr are pushing these initiatives because of what they see as a unique opportunity to bring to bear the knowledge of the photo-sharing site's millions of users. The images, which previously had very little metadata attached, will now be searchable by the countless tags being added.
In addition, said Raymond, the project is giving the library a chance to experiment with the latest interactive technologies.
"We're moving as aggressively as a government agency can to recognize the growing importance of Web 2.0," Raymond said. "This was a very low-cost opportunity to observe the tagging behavior and evaluate the quality we could get, and get our feet wet in a Web 2.0 community."
Already, just a day after the project debut, some individual photos have received more than 50 tags. Some might think so many tags for an individual photo could water down the usefulness of the metadata, but those involved in the project disagree.
"That's where the long tail comes in," Oates said. "If you compare a photo with 3 tags with one with 26, you've increased" searchability by orders of magnitude.