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This is a achieved through the use of "inflections", or different kinds of endings. With no ending, the ARK (in a URL) gives you what you expect from a web browser. If you add a single '?' to the end, for example,

Code Block
xml
xml
  http://arktexashistory.cdlibunt.orgedu/ark:/1303067531/tf5p30086kmetapth346793/?

it returns a brief machine- and eye-readable metadata record; in this case, an Electronic Resource Citation (ERC) using Dublin Core Kernel metadata., such as

Code Block
xml
xml
erc:
    who: Dallas  (:unavTex.). unavailablePolice Dept.
   what: [Photographs Truckeeof River,Identification below Truckee Station, looking towards Eastern
            Summit. -- Photographer's number: 222 -- Photographer's series:
            Central Pacific Railroad, California.
    Cards]
when:  (:unav) unavailable
    1963
where: http://arktexashistory.cdlibunt.orgedu/ark:/1303067531/tf5p30086kmetapth346793/

Adding '??' to the end should return a policy statement. 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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