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  • ARKs in Action
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An ARK provides extra services above and beyond that of an ordinary URL. Instead of connecting to one thing, an ARK should connect to three things:

  • the object itself,
  • a brief metadata record if you append a single question mark to the ARK, and
  • a maintenance commitment from the current server when you append two question marks.

In a web browser, for example, if you enter

http://ark.cdlib.org/ark:/13030/tf5p30086k?

it returns a brief machine- and eye-readable metadata record, such as

erc:

    who:   (:unav) unavailable

    what:  Truckee River, below Truckee Station, looking towards Eastern

            Summit. -- Photographer's number: 222 -- Photographer's series:

            Central Pacific Railroad, California.

    when:  (:unav) unavailable

    where: http://ark.cdlib.org/ark:/13030/tf5p30086k

It is a side-benefit of ARKs that an object's metadata doesn't need an identifier different from that for the object, which cuts in half the number of identifiers that need to be generated and managed.

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